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Z71 was originally for fulsize 4x4 truck/suvs. it includes off road shocks and suspension, different tires, and skid plates. best i know they have now offered it on 2wd trucks/suvs. and the colorado/canyon models.
ZR2 was the offroad package for S-10 models for a couple years before they got replaced by the canyon/colorado.
Z66 was the ON-road suspension package for the avalanche.
Z85 is the heavy duty trailering suspension package.
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2010 CGM 2SS/RS M6 LS3 Black/Gray
Exterior American Racing BLVD Black w/Machined(20x10) Mickey Thompson Street Comps(275/40 & 305/35)
Suspension Pedders Pace Car Pkg w/ZL1 Upgrade; Pedders Upper & Lower Control Arm, Steering, & Differential Mount Bushings; Pedders SS Brake Lines; Pedders Dual Bearing Camber Plates; ZL1 Toe Link; Hawk Performance Ceramic brake pads
Drivetrain Maggie2300(8psi-3.4pulley); CompCam; 85lb injectors; ZL1 fuel pump; ZR1 MAP; Centerforce DYAD Twin Disc clutch; Stainless Works LT headers; QTP Cutouts; Rotofab intake; RX catch can; Mike Norris tune 643rwhp 598 rwtq
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