Camshaft, Hydraulic Tappet 231-239



True roller rockers a must. 7/16th rocker studs required.  Deep exhaust tone. Moderate to heavy Chop in exhaust. Suggested compression ratio 9.8 to 10.3. Stall speed suggested minimum 2400 for automatic transmission applications. Can be used with manual transmission as well. Suggested gear ratio with automatic 3.42 to 3.90. Manual transmission gear ratio suggested 3.73 to 4.30. Aftermarket intake, headers, enhanced ignition system suggested. RPM range 2600 to 6000

@.050 231 int.
@.050 239 exh.
Lobe separation 112
Int. Lift .540
Exh. Lift .530

suggested lifters