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117 Rancho ® Part Numbers ending with the letter "B" Designate Black Finish. Rancho ® does not recommend or endorse the use of its products in conjunction with those of other aftermarket suspension or lift kit manufacturers. RAISED HEIGHT SUSPENSION SHOCK ABSORBERS YEAR MODEL FRONT REAR QTY DESCRIPTION KIT PART NO. FRONT REAR Suspension CHEVROLET Pickup — Silverado 2500HD ¾ Ton - 4WD 2015-11 All; w/ Torsion Bar Relocation System 4 ″ 3 ″ RS6554B★ 1 Brackets RS6554B-1 RS5380 RS5381 1 Left Knuckle RS6554B-2 — RS7381 1 Right Knuckle RS6554B-3 RS999380 RS999381 1 Subframe RS6554B-4 2015-11 All; w/ Torsion Bar Cross Member Drop System 4 ″ 3 ″ RS6564B★ 1 Miscellaneous RS6564B-1 RS5380 RS5381 1 Left Knuckle RS6564B-2 — RS7381 1 Right Knuckle RS6564B-3 RS999380 RS999381 1 Subframe RS6564B-4 2015-11 All; Torsion Key Kit (Includes Front Shocks) 2¼ ″ 0 ″ 1 Torsion Key Kit RS66351R5 Inc. RS5379 2010-01 All; Torsion Key Kit (Includes Front Shocks) 2¼ ″ 0 ″ 1 Torsion Key Kit RS66350R5 Inc. RS55274 RS5274 2010-01 w/ Automatic Transmission; w/ Torsion Bar 4 ″ 2½ ″ RS6548B★ 1 Brackets RS6548-1 RS6548B-1 RS55289 RS5289 RS55297 RS5297 1 Knuckles RS6548-2 RS6548B-2 RS7296 RS7297 1 Subframe RS6548-3 RS6548B-3 RS999289 RS999297 Pickup — Silverado 2500HD ¾ Ton - 4WD — Steering Stabilizers STABILIZER YEAR MODEL SHOCK BRACKET 2010-01 All w/ OEM Steering Damper Mounts; Single Steering Damper RS5411 — RS7411 2008-01 All w/o OEM Steering Damper Mounts; Single Steering Damper RS5407 RS5548 RS7407 Pickup — Silverado 2500HD ¾ Ton - 2WD 2015-11 All; w/ Torsion Bar Relocation System 4 ″ 3 ″ RS6554B★ 1 Brackets RS6554B-1 RS5380 RS5381 1 Left Knuckle RS6554B-2 — RS7381 1 Right Knuckle RS6554B-3 RS999380 RS999381 1 Subframe RS6554B-4 2015-11 All; w/ Torsion Bar Cross Member Drop System 4 ″ 3 ″ RS6564B★ 1 Miscellaneous RS6564B-1 RS5380 RS5381 1 Left Knuckle RS6564B-2 — RS7381 1 Right Knuckle RS6564B-3 RS999380 RS999381 1 Subframe RS6564B-4 2015-11 All; Torsion Key Kit (Includes Front Shocks) 2¼ ″ 0 ″ 1 Torsion Key Kit RS66351R5 Inc. RS5379 2010-01 All; Torsion Key Kit (Includes Front Shocks) 2¼ ″ 0 ″ 1 Torsion Key Kit RS66350R5 Inc. RS55274 RS5274 2010-01 w/ Automatic Transmission; w/ Torsion Bar 4 ″ 2½ ″ RS6548B★ 1 Brackets RS6548-1 RS6548B-1 RS55289 RS5289 RS55297 RS5297 1 Knuckles RS6548-2 RS6548B-2 RS7296 RS7297 1 Subframe RS6548-3 RS6548B-3 RS999289 RS999297