Butler Spring kit with valve springs, retainers, locks, seals, shims and install tool (w/Viton Seals option). For Cast Iron Heads
Comp Dual Springs Set/16
for use with Hyd Roller Lifters and most stock Pontiac cast iron heads
155 @1.600 355 @1.050 (.550 lift), .980 Coil Bind
Advertised coil bind height- 1.020"
Actual coil bind height measured with 740-16 retainer- .980"
Recommended installed height when used with a hyd. flat tappet
115 @ 1.700
*Cutting valve seats may be required in a stock cast iron head*
Comp Retainers
Comp Locks,
Viton Valve Stem Seals w/install tool
Assortment of shims
