Comp Cams 54-601-11 Mutha Thumpr 3-Bolt Camshaft for Chevrolet Gen III IV LS 563/546 LiftMutha' Thumpr 227 241 Hydraulic Roller Cam for GM LS GEN III IV Grind Number: 283THR9 Engine Family: GM LS GEN III IV 3 Bolt 8 Cylinder (1997 2015) RPM Operating Range: 2,300 6,600 Cam Type: Hydraulic Roller Lifter Style: Hydraulic Roller Camshaft Series: Thumpr Camshaft Gear Attachment: 3 Bolt Usage: Street Strip Valve Springs Required: Yes Camshaft Material: Billet Steel Advertised Intake Duration: 283 Advertised Exhaust Duration: 303 Intake

Diameter (in): 5

Holley's Street Avenger 4-barrel carbs give you trouble-free performance in a good-looking

250" Stroke

This kit includes everything needed to delete AFM/DOD (Active Fuel Management) from GM Gen IV 5

Note:  These rocker arms will require you to change your pushrod length

Specially designed 1/2 inch drive socket allows rotation of engine assembly

Enginetech RCF302LP Rebuild Ford 302 5

Includes dual springs

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The aggressive exhaust note of a Thumpr cams comes from a combination of early exhaust valve opening

•No modifications required to install

Notes:32 pieces