Stage 1 Thumpr 222/233 Master Cam Kit for GEN IV LS 4.8/5.3/6.0L Trucks
Stage 1 Thumpr 222/233 Master Cam Kit for GEN IV LS 4.8/5.3/6.0L Trucks. Perfect choice for strong idle lope and great power in 4.8 & 5.3L truck engines. No Springs Required (NSR) version of popular Thumpr lobe designs. AFM & VVT delete.