{ "id":7119425437739, "title":"Boxed Upper Control Arms", "handle":"boxed-upper-control-arms-2", "description":"\u003cscript type=\"text\/javascript\"\u003e\/\/ \u003c![CDATA[\n$(document).ready(function($) {\n $('#accordion').find('.accordion-toggle').click(function(){\n\n \/\/Expand or collapse this panel\n $(this).next().slideToggle('slow');\n\n \/\/Hide the other panels\n $(\".accordion-content\").not($(this).next()).slideUp('slow');\n\n });\n });\n\/\/ ]]\u003e\u003c\/script\u003e\n\u003cdiv id=\"accordion\"\u003e\n\u003ch4 class=\"accordion-toggle\"\u003e\n\u003ci aria-hidden=\"true\" class=\"fa fa-info-circle\"\u003e\u003c\/i\u003e Description\u003c\/h4\u003e\n\u003cdiv class=\"accordion-content \u0026lt;!--default--\u0026gt;\"\u003e\n\u003cp\u003eThere are multiple issues when lifting your vehicle with stock upper control arms. Both the geometry and strength are compromised due to over articulating the stock arms. We solved these problems by designing our upper control arms with increased castor and repositioned pivot angles reducing stress on the joints. The increased castor allows for proper alignment and improved handling. \u003cspan data-mce-fragment=\"1\"\u003eWe upgraded the ball joints to heavy duty Moog joints for maximum strength and increased articulation. \u003c\/span\u003eFor the inner pivots we use durable delrin bushings with grease fittings for easy servicing. All of the components on our upper control arms are rebuild-able or replaceable to make this product last a lifetime. The arms come preassembled and include detailed instructions for easy installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch4 class=\"accordion-toggle\"\u003e\n\u003ci aria-hidden=\"true\" class=\"fa fa-gears\"\u003e\u003c\/i\u003e Specifications\u003c\/h4\u003e\n\u003cdiv class=\"accordion-content\"\u003e\n\u003cul\u003e\n\u003cli\u003eAmount of Lift: 0-3”\u003c\/li\u003e\n\u003cli\u003eTrack Width: Stock\u003c\/li\u003e\n\u003cli\u003eMaximum Backspacing: 4.75”\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eMinimum Rim Size: 17”\u003c\/li\u003e\n\u003cli\u003eCompatible with Sway Bar: Yes\u003c\/li\u003e\n\u003cli\u003eCoil Over Shock Size: Stock or OEM replacement shocks\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003eWheel Travel \/ Lift\u003c\/strong\u003e\u003cbr\u003e The Dirt King upper control arms must be paired with aftermarket coilover shocks to lift the vehicle. The Dirt King arms offer maximum down travel compared to the stock upper control arms. These arms are compatible with Dirt King, King, Fox, Bilstein, ADS and Icon coilovers. Do not install these upper control arms with coil spacers paired with extended length aftermarket shocks.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003eTire Info\u003c\/strong\u003e\u003cbr\u003e The upper control arms allow for 35” tires but for proper tire clearance modifications to the wheel well and bumper may need to be made.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003eMagnetic Ride Control\u003cbr\u003e \u003c\/strong\u003eInstalling this suspension on vehicles equipped with magnetic ride control require modifications to the ride control sensors. If you choose to replace the magnetic ride control shocks with coil overs it will cause an indication light to appear on the gauge cluster.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch4 class=\"accordion-toggle\"\u003e\n\u003ci aria-hidden=\"true\" class=\"fa fa-check-square-o\"\u003e\u003c\/i\u003e What's Included\u003c\/h4\u003e\n\u003cdiv class=\"accordion-content\"\u003e\n\u003cul\u003e\n\u003cli\u003eBoxed plate upper control arms\u003c\/li\u003e\n\u003cli\u003eDelrin bushings\u003c\/li\u003e\n\u003cli\u003eGrease fittings\u003c\/li\u003e\n\u003cli\u003eMoog ball joints\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eZinc plated inner bushing sleeves\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eDurable black powder coat\u003c\/li\u003e\n\u003cli\u003eDirt King sticker pack\u003c\/li\u003e\n\u003cli\u003eInstallation instructions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003ch4 class=\"accordion-toggle\"\u003e\n\u003ci aria-hidden=\"true\" class=\"fa fa-list\"\u003e\u003c\/i\u003e  Features\u003c\/h4\u003e\n\u003cdiv class=\"accordion-content\"\u003e\n\u003cul\u003e\n\u003cli\u003eCAD designed \u003cstrong\u003e\u003cbr\u003e \u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eBoxed plate construction\u003c\/li\u003e\n\u003cli\u003eBrushed stainless steel logo plates\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePreassembled for fast installation\u003c\/li\u003e\n\u003cli\u003eGrease fitting ports for easy servicing\u003c\/li\u003e\n\u003cli\u003eZinc plated components for corrosion resistance\u003c\/li\u003e\n\u003cli\u003eProfessionally MIG welded\u003c\/li\u003e\n\u003cli\u003eProudly made in the USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003ch4 class=\"accordion-toggle\"\u003e\n\u003ci aria-hidden=\"true\" class=\"fa fa-car\"\u003e\u003c\/i\u003e  Compatibility\u003c\/h4\u003e\n\u003cdiv class=\"accordion-content\"\u003e\n\u003cp\u003e2007-2020 Chevy Tahoe 2WD \/ 4WD \u003cbr\u003e 2007-2020 GMC Yukon 2WD \/ 4WD\u003cbr\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003e\u003ca data-target=\"#myModal2\" data-toggle=\"modal\"\u003e\u003cimg alt=\"\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/2493\/4414\/files\/suspension.jpg?v=1513716846\"\u003e\u003c\/a\u003e\u003cbr\u003e \u003csmall\u003eClick image for larger view...\u003c\/small\u003e\u003c\/p\u003e\n\u003cdiv role=\"dialog\" class=\"modal fade\" id=\"myModal2\"\u003e\n\u003cdiv style=\"width: 95%;\" class=\"modal-dialog\"\u003e\n\u003cdiv class=\"modal-content\"\u003e\n\u003cdiv class=\"modal-header\"\u003e\u003cbutton data-dismiss=\"modal\" class=\"close\" type=\"button\"\u003e×\u003c\/button\u003e\u003c\/div\u003e\n\u003cdiv class=\"modal-body\"\u003e\u003cimg alt=\"\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/2493\/4414\/files\/suspension.jpg?v=1513716846\" width=\"100%\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e", "published_at":"2023-06-13T09:54:58-07:00", "created_at":"2023-06-13T09:39:20-07:00", "vendor":"Dirt King Fabrication", "type":"Chevy \/ GMC", "tags":["07 Tahoe","07 Yukon","08 Tahoe","08 Yukon","09 Tahoe","09 Yukon","10 Tahoe","10 Yukon","11 Tahoe","11 Yukon","12 Tahoe","12 Yukon","13 Tahoe","13 Yukon","14 Tahoe","14 Yukon","15 Tahoe","15 Yukon","16 Tahoe","16 Yukon","17 Tahoe","17 Yukon","18 Tahoe","18 Yukon","19 Tahoe","19 Yukon","20 Tahoe","20 Yukon","All Years","DK-30%MAX","Drivetrain_2WD","Drivetrain_4WD","Drivetrain_View All","Fits: Tahoe 2007-2020 | 2WD \/ 4WD","Fits: Yukon 2007-2020 | 2WD \/ 4WD","Lead time 5","Product Type_Front End","Product Type_View All","Sale","Tahoe","Yukon"], "price":84900, "price_min":84900, "price_max":84900, "available":true, "price_varies":false, "compare_at_price":null, "compare_at_price_min":0, "compare_at_price_max":0, "compare_at_price_varies":false, "variants":[{"id":40808365359147, "title":"Select", "option1":"Select", "option2":null, "option3":null, "sku":"Make Selection", "requires_shipping":true, "taxable":true, "featured_image":null, "available":true, "options":["Select"], "price":84900, "weight":0, "compare_at_price":null, "inventory_quantity":0, "inventory_management":null, "inventory_policy":"continue", "barcode":"266233119"},{"id":40808365391915, "title":"Cast Steel 07-16 Models", "option1":"Cast Steel 07-16 Models", "option2":null, "option3":null, "sku":"DK-631981", "requires_shipping":true, "taxable":true, "featured_image":null, "available":true, "options":["Cast Steel 07-16 Models"], "price":84900, "weight":9843, "compare_at_price":null, "inventory_quantity":20, "inventory_management":"shopify", "inventory_policy":"continue", "barcode":"DK-631981"},{"id":40808365424683, "title":"Cast Aluminum 14-16 Models", "option1":"Cast Aluminum 14-16 Models", "option2":null, "option3":null, "sku":"DK-635981", "requires_shipping":true, "taxable":true, "featured_image":null, "available":true, "options":["Cast Aluminum 14-16 Models"], "price":84900, "weight":9979, "compare_at_price":null, "inventory_quantity":0, "inventory_management":"shopify", "inventory_policy":"continue", "barcode":"DK-635981"},{"id":40808365457451, "title":"Stamped Steel 16-20 Models", "option1":"Stamped Steel 16-20 Models", "option2":null, "option3":null, "sku":"DK-635981", "requires_shipping":true, "taxable":true, "featured_image":null, "available":true, "options":["Stamped Steel 16-20 Models"], "price":84900, "weight":10433, "compare_at_price":null, "inventory_quantity":0, "inventory_management":"shopify", "inventory_policy":"continue", "barcode":"DK-635981"}], "images":["\/\/dirtking.com\/cdn\/shop\/files\/DK-635981w-hardware_7e45c482-d8b5-491b-95a3-18daa185834a.jpg?v=1686674366","\/\/dirtking.com\/cdn\/shop\/files\/DK-635981Angle2_6aa653c3-9925-4c24-85b3-4264f72c50e7.jpg?v=1686674366","\/\/dirtking.com\/cdn\/shop\/files\/DK-635981Detail1_5f85cfa9-9af8-468f-bb4c-3f0826b9b111.jpg?v=1686674367","\/\/dirtking.com\/cdn\/shop\/files\/DK-635981Detail3_a4658293-d38c-43d9-bcfc-72ff61b9f5e3.jpg?v=1686674367"], "featured_image":"\/\/dirtking.com\/cdn\/shop\/files\/DK-635981w-hardware_7e45c482-d8b5-491b-95a3-18daa185834a.jpg?v=1686674366", "options":["OEM Suspension Type"], "content":"\u003cscript type=\"text\/javascript\"\u003e\/\/ \u003c![CDATA[\n$(document).ready(function($) {\n $('#accordion').find('.accordion-toggle').click(function(){\n\n \/\/Expand or collapse this panel\n $(this).next().slideToggle('slow');\n\n \/\/Hide the other panels\n $(\".accordion-content\").not($(this).next()).slideUp('slow');\n\n });\n });\n\/\/ ]]\u003e\u003c\/script\u003e\n\u003cdiv id=\"accordion\"\u003e\n\u003ch4 class=\"accordion-toggle\"\u003e\n\u003ci aria-hidden=\"true\" class=\"fa fa-info-circle\"\u003e\u003c\/i\u003e Description\u003c\/h4\u003e\n\u003cdiv class=\"accordion-content \u0026lt;!--default--\u0026gt;\"\u003e\n\u003cp\u003eThere are multiple issues when lifting your vehicle with stock upper control arms. Both the geometry and strength are compromised due to over articulating the stock arms. We solved these problems by designing our upper control arms with increased castor and repositioned pivot angles reducing stress on the joints. The increased castor allows for proper alignment and improved handling. \u003cspan data-mce-fragment=\"1\"\u003eWe upgraded the ball joints to heavy duty Moog joints for maximum strength and increased articulation. \u003c\/span\u003eFor the inner pivots we use durable delrin bushings with grease fittings for easy servicing. All of the components on our upper control arms are rebuild-able or replaceable to make this product last a lifetime. The arms come preassembled and include detailed instructions for easy installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch4 class=\"accordion-toggle\"\u003e\n\u003ci aria-hidden=\"true\" class=\"fa fa-gears\"\u003e\u003c\/i\u003e Specifications\u003c\/h4\u003e\n\u003cdiv class=\"accordion-content\"\u003e\n\u003cul\u003e\n\u003cli\u003eAmount of Lift: 0-3”\u003c\/li\u003e\n\u003cli\u003eTrack Width: Stock\u003c\/li\u003e\n\u003cli\u003eMaximum Backspacing: 4.75”\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eMinimum Rim Size: 17”\u003c\/li\u003e\n\u003cli\u003eCompatible with Sway Bar: Yes\u003c\/li\u003e\n\u003cli\u003eCoil Over Shock Size: Stock or OEM replacement shocks\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003eWheel Travel \/ Lift\u003c\/strong\u003e\u003cbr\u003e The Dirt King upper control arms must be paired with aftermarket coilover shocks to lift the vehicle. The Dirt King arms offer maximum down travel compared to the stock upper control arms. These arms are compatible with Dirt King, King, Fox, Bilstein, ADS and Icon coilovers. Do not install these upper control arms with coil spacers paired with extended length aftermarket shocks.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003eTire Info\u003c\/strong\u003e\u003cbr\u003e The upper control arms allow for 35” tires but for proper tire clearance modifications to the wheel well and bumper may need to be made.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003eMagnetic Ride Control\u003cbr\u003e \u003c\/strong\u003eInstalling this suspension on vehicles equipped with magnetic ride control require modifications to the ride control sensors. If you choose to replace the magnetic ride control shocks with coil overs it will cause an indication light to appear on the gauge cluster.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch4 class=\"accordion-toggle\"\u003e\n\u003ci aria-hidden=\"true\" class=\"fa fa-check-square-o\"\u003e\u003c\/i\u003e What's Included\u003c\/h4\u003e\n\u003cdiv class=\"accordion-content\"\u003e\n\u003cul\u003e\n\u003cli\u003eBoxed plate upper control arms\u003c\/li\u003e\n\u003cli\u003eDelrin bushings\u003c\/li\u003e\n\u003cli\u003eGrease fittings\u003c\/li\u003e\n\u003cli\u003eMoog ball joints\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eZinc plated inner bushing sleeves\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eDurable black powder coat\u003c\/li\u003e\n\u003cli\u003eDirt King sticker pack\u003c\/li\u003e\n\u003cli\u003eInstallation instructions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003ch4 class=\"accordion-toggle\"\u003e\n\u003ci aria-hidden=\"true\" class=\"fa fa-list\"\u003e\u003c\/i\u003e  Features\u003c\/h4\u003e\n\u003cdiv class=\"accordion-content\"\u003e\n\u003cul\u003e\n\u003cli\u003eCAD designed \u003cstrong\u003e\u003cbr\u003e \u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eBoxed plate construction\u003c\/li\u003e\n\u003cli\u003eBrushed stainless steel logo plates\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePreassembled for fast installation\u003c\/li\u003e\n\u003cli\u003eGrease fitting ports for easy servicing\u003c\/li\u003e\n\u003cli\u003eZinc plated components for corrosion resistance\u003c\/li\u003e\n\u003cli\u003eProfessionally MIG welded\u003c\/li\u003e\n\u003cli\u003eProudly made in the USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003ch4 class=\"accordion-toggle\"\u003e\n\u003ci aria-hidden=\"true\" class=\"fa fa-car\"\u003e\u003c\/i\u003e  Compatibility\u003c\/h4\u003e\n\u003cdiv class=\"accordion-content\"\u003e\n\u003cp\u003e2007-2020 Chevy Tahoe 2WD \/ 4WD \u003cbr\u003e 2007-2020 GMC Yukon 2WD \/ 4WD\u003cbr\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003e\u003ca data-target=\"#myModal2\" data-toggle=\"modal\"\u003e\u003cimg alt=\"\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/2493\/4414\/files\/suspension.jpg?v=1513716846\"\u003e\u003c\/a\u003e\u003cbr\u003e \u003csmall\u003eClick image for larger view...\u003c\/small\u003e\u003c\/p\u003e\n\u003cdiv role=\"dialog\" class=\"modal fade\" id=\"myModal2\"\u003e\n\u003cdiv style=\"width: 95%;\" class=\"modal-dialog\"\u003e\n\u003cdiv class=\"modal-content\"\u003e\n\u003cdiv class=\"modal-header\"\u003e\u003cbutton data-dismiss=\"modal\" class=\"close\" type=\"button\"\u003e×\u003c\/button\u003e\u003c\/div\u003e\n\u003cdiv class=\"modal-body\"\u003e\u003cimg alt=\"\" src=\"\/\/cdn.shopify.com\/s\/files\/1\/2493\/4414\/files\/suspension.jpg?v=1513716846\" width=\"100%\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e"}

Boxed Upper Control Arms

Overview

 Description

There are multiple issues when lifting your vehicle with stock upper control arms. Both the geometry and strength are compromised due to over articulating the stock arms. We solved these problems by designing our upper control arms with increased castor and repositioned pivot angles reducing stress on the joints. The increased castor allows for proper alignment and improved handling. We upgraded the ball joints to heavy duty Moog joints for maximum strength and increased articulation. For the inner pivots we use durable delrin bushings with grease fittings for easy servicing. All of the components on our upper control arms are rebuild-able or replaceable to make this product last a lifetime. The arms come preassembled and include detailed instructions for easy installation.

 Specifications

  • Amount of Lift: 0-3”
  • Track Width: Stock
  • Maximum Backspacing: 4.75”
  • Minimum Rim Size: 17”
  • Compatible with Sway Bar: Yes
  • Coil Over Shock Size: Stock or OEM replacement shocks

Wheel Travel / Lift
The Dirt King upper control arms must be paired with aftermarket coilover shocks to lift the vehicle. The Dirt King arms offer maximum down travel compared to the stock upper control arms. These arms are compatible with Dirt King, King, Fox, Bilstein, ADS and Icon coilovers. Do not install these upper control arms with coil spacers paired with extended length aftermarket shocks.


Tire Info
The upper control arms allow for 35” tires but for proper tire clearance modifications to the wheel well and bumper may need to be made.


Magnetic Ride Control
Installing this suspension on vehicles equipped with magnetic ride control require modifications to the ride control sensors. If you choose to replace the magnetic ride control shocks with coil overs it will cause an indication light to appear on the gauge cluster.

 What's Included

  • Boxed plate upper control arms
  • Delrin bushings
  • Grease fittings
  • Moog ball joints
  • Zinc plated inner bushing sleeves
  • Durable black powder coat
  • Dirt King sticker pack
  • Installation instructions

  Features

  • CAD designed 
  • Boxed plate construction
  • Brushed stainless steel logo plates
  • Preassembled for fast installation
  • Grease fitting ports for easy servicing
  • Zinc plated components for corrosion resistance
  • Professionally MIG welded
  • Proudly made in the USA

  Compatibility

2007-2020 Chevy Tahoe 2WD / 4WD
2007-2020 GMC Yukon 2WD / 4WD




Click image for larger view...

Sku: Make Selection
Maximum quantity available reached.

Please view our shipping policy, exchange policy, and disclaimer information for details. If you would like more information or have any questions regarding our products,  feel free to contact us for assistance by visiting our contact page. 

Shipping & Delivery
Dirt King ships their products within the United States and Internationally. Most products ship via UPS or USPS. Orders that exceed $500 require a signature confirmation. On bulk orders contact Dirt King for a freight quote. The customer is responsible for import taxes and fees on international shipments.

Damaged or Missing Parts
In an instance where you receive a damaged package a claim must be made with Dirt King. The claim can be submitted by sending an email to sales@dirtkingfabrication.com containing photos of the damaged packages and damaged products. The email must also include your order number as well. Do not discard any of the original packaging or try installing the products.

While every precaution is taken there could be a case where you are missing parts. If this happens please send an email to sales@dirtkingfabrication.com with your order number, list of missing parts, photo of the package or packages, and a photo of the quality control tag located on the back of the box.

If the shipping carrier losses your package please contact Dirt King. A claim will be filled with the shipping carrier. Unfortunately, we do not have much control over this situation and must wait for the carrier to process the claim.

Freight Shipping
The customer must contact Dirt King to arrange for freight shipping. Dirt King will palletize the order and the customer can deal directly with the freight carrier if preferred. The shipment can be delivered to a home or business. The customer must be present for the delivery to inspect and sign for the package. Before signing confirm that you received all items listed on the packing slip and nothing is damaged. If you receive damaged parts or are missing parts leave a note on the bill of landing and sign it. Make sure the driver is aware of the situation and signs your copy of the bill of landing with the noted damages or missing parts. Once you have taken possession of the package file a claim with Dirt King by sending an email to sales@dirtkingfabrication.com. Please include your order number, copy of your bill of landing, and photos of the damaged items or list of missing parts. Do not discard any of the original packaging or try installing the products. Dirt King will do everything possible to resolve the issue as quickly as possible.

Returns & Exchange
  • Returns are only accepted within 30 days.
  • Product must have been purchased from us and not a dealer.
  • A 3% processing fee is deducted from all refunds.
  • On shipped orders a 7% restocking fee and a 3% processing fee is deducted from all refunds.
  • Products such as bumpers, hitches, and bed cages that have optional powder coat added are subject to a 7% restocking fee and a 3% processing fee. If the order is canceled before the product is powder coated then the 7% restocking fee can be waived.
  • On shipped orders we are not responsible for return shipping or refunding the original shipping amount.
  • Parts must be returned in the original package and condition as they were sent.
  • No returns on items that have been damaged or installed.
  • Refund will be issued once the parts have been received and inspected.
  • Custom products are non refundable.
  • Crypto orders will be refunded the same coin amount that was paid originally.
Disclaimer

All products sold or manufactured by Dirt King are intended for off-road use only. Our products are strictly engineered and tested and are not to be modified from their original design in any way. Welding should always be done at a qualified and certified facility only. Customer assumes all liability in assuring that parts are installed correctly, maintained, and not modified or altered in any way. Dirt King is not responsible or liable for any accidents, injuries, or deaths that may occur from the use of any products offered. Suspension modifications may change the dynamics and stability characteristics of the vehicle. Ensuring prompt wheel alignment and ADAS recalibration after suspension modifications is critical and the sole responsibility of the customer.