Duramax Diesel Parts & Upgrades

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Cognito Extreme Duty Tie Rod Center Link Kit For 11-25 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito Extreme Duty Tie Rod Center Link Kit For 11-25 Silverado/Sierra 2500/3500 2WD/4WD Sale price$749.99
Cognito 12-Inch Performance Lift Kit with Fox PSRR 2.0 Shocks for 2011-2019 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito 12-Inch Performance Lift Kit with Fox PSRR 2.0 Shocks for 2011-2019 Silverado/Sierra 2500/3500 2WD/4WD Sale price$8,321.99
Cognito Ball Joint SM Series Upper Control Arm Kit For 20-25 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito Ball Joint SM Series Upper Control Arm Kit For 20-25 Silverado/Sierra 2500/3500 2WD/4WD Sale price$699.99
Cognito Tubular Series LDG Traction Bar Kit For 20-25 Silverado/Sierra 2500/3500 with 0-4.0-Inch Rear Lift Height - Southern Diesel Supply
Cognito Motorsports
Cognito Tubular Series LDG Traction Bar Kit For 20-25 Silverado/Sierra 2500/3500 with 0-4.0-Inch Rear Lift Height Sale price$1,149.99
Cognito 3-Inch Standard SM Series Leveling Kit for 20-25 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito 3-Inch Standard SM Series Leveling Kit for 20-25 Silverado/Sierra 2500/3500 2WD/4WD Sale price$1,099.99
Cognito 10-Inch Performance Lift Kit with Fox PSRR 2.0 Shocks for 2011-2019 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito 10-Inch Performance Lift Kit with Fox PSRR 2.0 Shocks for 2011-2019 Silverado/Sierra 2500/3500 2WD/4WD Sale price$8,161.99
Cognito Comfort Ride Torsion Bar Kit for 20-25 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito Comfort Ride Torsion Bar Kit for 20-25 Silverado/Sierra 2500/3500 2WD/4WD Sale price$944.99
Cognito SM Series LDG Traction Bar Kit For 20-25 Silverado/Sierra 2500/3500 2WD/4WD with 0-4.0-Inch Rear Lift Height - Southern Diesel Supply
Cognito Motorsports
Cognito SM Series LDG Traction Bar Kit For 20-25 Silverado/Sierra 2500/3500 2WD/4WD with 0-4.0-Inch Rear Lift Height Sale price$1,749.99
Cognito 5-Inch Performance Lift Kit with Fox PSRR 2.0 Shocks for 20-25 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito 5-Inch Performance Lift Kit with Fox PSRR 2.0 Shocks for 20-25 Silverado/Sierra 2500/3500 2WD/4WD Sale price$5,433.99
Cognito 3-Inch Elite Leveling Kit with Fox 2.5 Elite Performance Series Shocks for 11-19 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito 3-Inch Elite Leveling Kit with Fox 2.5 Elite Performance Series Shocks for 11-19 Silverado/Sierra 2500/3500 2WD/4WD Sale price$4,459.99
Cognito 3-Inch Elite Leveling Kit with Fox 2.5 Elite Performance Series Shocks for 20-25 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito 3-Inch Elite Leveling Kit with Fox 2.5 Elite Performance Series Shocks for 20-25 Silverado/Sierra 2500/3500 2WD/4WD Sale price$4,459.99
Cognito 2-Inch Economy Leveling Lift Kit for 20-25 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito 2-Inch Economy Leveling Lift Kit for 20-25 Silverado/Sierra 2500/3500 2WD/4WD Sale price$359.99
Cognito Super Stock Kit for 2024-25 GM 2500HD AT4X & ZR2 - Southern Diesel Supply
Cognito Motorsports
Cognito Super Stock Kit for 2024-25 GM 2500HD AT4X & ZR2 Sale price$1,059.99
Cognito 3-Inch Standard Leveling Lift Kit for 19-25 Silverado/Sierra 1500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito 3-Inch Standard Leveling Lift Kit for 19-25 Silverado/Sierra 1500 2WD/4WD Sale price$1,049.99
Cognito 2-Inch Economy Leveling Lift Kit for 19-25 Silverado/Sierra 1500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito 2-Inch Economy Leveling Lift Kit for 19-25 Silverado/Sierra 1500 2WD/4WD Sale price$369.99
Cognito 1-Inch Performance Ball Joint Leveling Kit With Fox PS Coilover 2.0 IFP Shocks for 19-25 Silverado Trail Boss & ZR2/Sierra AT4 & AT4X 1500 4WD - Southern Diesel Supply
Cognito Motorsports
Cognito 1-Inch Performance Ball Joint Leveling Kit With Fox PS Coilover 2.0 IFP Shocks for 19-25 Silverado Trail Boss & ZR2/Sierra AT4 & AT4X 1500 4WD Sale price$2,399.99
Cognito 3-Inch Standard SM Series Leveling Kit for 20-25 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito 3-Inch Standard SM Series Leveling Kit for 20-25 Silverado/Sierra 2500/3500 2WD/4WD Sale price$899.99
Cognito SM Series Upper Control Arm Kit for 19-25 Silverado/Sierra 1500 2WD/4WD Including AT4, AT4X, Trail Boss, & ZR2 - Southern Diesel Supply
Cognito Motorsports
Cognito SM Series Upper Control Arm Kit for 19-25 Silverado/Sierra 1500 2WD/4WD Including AT4, AT4X, Trail Boss, & ZR2 Sale price$659.99
Cognito 3-Inch Performance Ball Joint Leveling Lift Kit With Fox PS Coilover 2.0 IFP Shocks for 19-25 Silverado/Sierra 1500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito 3-Inch Performance Ball Joint Leveling Lift Kit With Fox PS Coilover 2.0 IFP Shocks for 19-25 Silverado/Sierra 1500 2WD/4WD Sale price$2,637.99
Cognito 7-Inch Performance Lift Kit with Fox PSRR 2.0 Shocks For 20-25 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito 7-Inch Performance Lift Kit with Fox PSRR 2.0 Shocks For 20-25 Silverado/Sierra 2500/3500 2WD/4WD Sale price$6,578.99
Cognito 2-Inch Economy Leveling Kit For 20-25 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito 2-Inch Economy Leveling Kit For 20-25 Silverado/Sierra 2500/3500 2WD/4WD Sale price$169.99
Cognito 3-Inch Performance Ball Joint Leveling Kit With Fox PS Coilover 2.0 IFP Shocks for 19-25 Silverado/Sierra 1500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito 3-Inch Performance Ball Joint Leveling Kit With Fox PS Coilover 2.0 IFP Shocks for 19-25 Silverado/Sierra 1500 2WD/4WD Sale price$2,409.99
Cognito 7-Inch Standard Lift Kit with Fox PSMT 2.0 Shocks For 20-25 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito 7-Inch Standard Lift Kit with Fox PSMT 2.0 Shocks For 20-25 Silverado/Sierra 2500/3500 2WD/4WD Sale price$5,064.99
Cognito Forged Pitman Idler Arm Support Kit Silverado/Sierra for 11-25 Silverado/Sierra 2500/3500 2WD/4WD - Southern Diesel Supply
Cognito Motorsports
Cognito Forged Pitman Idler Arm Support Kit Silverado/Sierra for 11-25 Silverado/Sierra 2500/3500 2WD/4WD Sale price$259.99

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Our Wildwood, FL techs will confirm the right part for your build before you buy.

Call or Text (352) 722-5295

Parts and performance upgrades for every Duramax-powered Chevy and GMC, from the 2001 LB7 to the latest L5P, plus the 3.0L and 2.8L Duramax. Southern Diesel Supply is a working diesel shop, so we stock the parts we install every week: lift pumps, injectors, CP3 and CP4 pumps, turbos, Allison transmission parts, suspension and maintenance items.

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Need more fuel? See our AirDog lift pumps. Running a Cummins or Powerstroke instead? Shop Cummins parts or Powerstroke parts.