HYDRAULIC - Big Mutha' Thumpr Retro-Fit: Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle.
Product Features:- HYDRAULIC - Big Mutha' Thumpr Retro-Fit: Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle.
- 295/313 Advertised Duration, 243/257 Duration @ .050", .512"/.489" Lift, 107 Lobe Separation
- Valve spring upgrade required