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Comp Cams Mutha Thumpr Camshaft & Lifter Kit Chevy 8cyl '55-'98
This kit is high performance street/strip, needs 9:1 CR, 2500+ stall, intake, gears and headers. It has a rough idle.
Advertised Duration |
287 int./305 exh. |
Advertised Exhaust Duration |
305 |
Advertised Intake Duration |
287 |
Assembly Lubricant Included |
Yes |
Basic Operating RPM Range |
2,200-6,100 |
Brand |
COMP Cams |
Cam Style |
Hydraulic flat tappet |
Camshaft Gear Attachment |
3-bolt |
Computer-Controlled Compatible |
No |
Duration at 050 inch Lift |
235 int./249 exh. |
Exhaust Duration at 050 inch Lift |
249 |
Exhaust Valve Lash |
0.000 in. |
Exhaust Valve Lift with Factory Rocker Arm Ratio |
0.476 in. |
Gaskets Included |
No |
Grind Number |
287TH7 |
Intake Duration at 050 inch Lift |
235 |
Intake Valve Lash |
0.000 in. |
Intake Valve Lift with Factory Rocker Arm Ratio |
0.489 in. |
Lifter Style |
Hydraulic flat tappet |
Lifters Included |
Yes |
Lobe Separation (degrees) |
107 |
Locks Included |
No |
Part Type |
Camshaft and Lifter Kits |
Product Line |
COMP Cams Thumpr Hydraulic Flat Tappet Cam and Lifter Kits |
Pushrods Included |
No |
Quantity |
Sold as a kit. |
Retainers Included |
No |
Rocker Arms Included |
No |
Timing Chain and Gears Included |
No |
Valve Lift with Factory Rocker Arm Ratio |
0.489 int./0.476 exh. lift |
Valve Springs Included |
No |
Valve Stem Seal Set Included |
No |
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