12.5 to 1 stock stroke 440 906 heads with Entry Level FAST porting by Dwayne Porter Custom Solid Roller by Porter Exhaust manifolds and Dynomax mufflers 3,850LB 69 Six Pack Superbee Stock Hemi 4-speed with Centerforce clutch On hard street tires went 11.80's @ 119 first time out........Take out 850LBS and it'd run 127+ which is enough for 10.30's with slicks and an automatic, and that's through exhaust manifolds......