Product Information
- HYDRAULIC - Big Mutha' Thumpr: Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle.
- 295/312 Advertised Duration, 243/257 Duration @ .050 inch, .522 inch/.507 inch Lift, 107 Lobe Separation
- Valve spring upgrade required