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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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