Single Hydraulic Roller Valve Springs, Set.   A single spring with damper for TPIS line of hydraulic roller camshafts. 115lbs of seat pressure @ 1.800" installed height and 325lbs at 1.200" with coil bind at 1.150". Outside diameter is 1.250"...

Stock Diameter Dual Cam Springs, Set.   These silicon vanadium constructed springs are stress relieved and fully polished for maximum longevity. 155lbs on the seat at 1.800" installed height and 405lbs @ 1.150" with coil bind at 1.100" and max...

Camshaft, TPIS ZZx Hydraulic Roller Camshaft, 87-94 SBC/LT1 This is the largest hydraulic cam TPIS' offer for the SBC/LT engines.  This cam with its 239 degrees of duration and .558" lift, is streetable, but is intended for race engines...

Camshaft, TPIS ZZ9X Hydraulic Cam, 87-94 SBC/LT1. Designed specifically for forced induction and nitrous engines, this cam takes the intake lobe with 226 duration and .520" lift from our ZZ409 and the exhaust with 239 duration and .558" lift...

Camshaft, TPIS ZZ409 Hydraulic Roller Camshaft, 87-94 SBC/LT1. This is TPIS' most popular cam for the SBC/LT engines.  It is simply awesome!  The .520" lift, 226 duration single pattern design is an excellent choice for a wide variety of...

Camshaft, TPIS ZZ10 Hydraulic Roller Camshaft, 87-94 SBC/LT1. This 233/240 split duration cam is a good choice for a large displacement LT or small block fitted with a MiniRam intake.  Its .538"/.560" lift numbers really benefit bigger heads and...

Camshaft, TPIS Super L98 Hydraulic Roller Camshaft, SBC up to 1986. This particular cam is a great little upgrade for a TPI 305 or 350.  You can see 30-35hp and 40-50 lbs/ft on a stock aluminum head TPI Corvette engine and with the addition of 1.5...

Camshaft, TPIS 242/242i Solid Roller Camshaft, 87-92 SBC. This tight lash solid roller camshaft works great on a high rpm 350, but is ideally suited for a 383ci or larger engine.  Perfect for drag or road racing, this cam needs 11.0:1 or higher...

Camshaft, TPIS 242/242i Solid Roller Camshaft, up to 1986 SBC. This tight lash solid roller camshaft works great on a high rpm 350, but is ideally suited for a 383ci or larger engine.  Perfect for drag or road racing, this cam needs 11.0:1 or...

Camshaft, TPIS ZZ10 Hydraulic Roller Camshaft, up to 1986 SBC. This 233/240 split duration cam is a good choice for a large displacement LT or small block fitted with a MiniRam intake.  Its .538"/.560" lift numbers really benefit bigger heads and...

Camshaft, TPIS ZZx Hydraulic Roller Camshaft, up to 1986 SBC. This is the largest hydraulic cam TPIS' offer for the SBC/LT engines.  This cam with its 239 degrees of duration and .558" lift, is streetable, but is intended for race engines...

Camshaft, TPIS ZZ409 Hydraulic Roller Camshaft, SBC up to 1986. This is TPIS'  most popular cam for the SBC/LT engines.  It is simply awesome!  The .520" lift, 226 duration single pattern design is an excellent choice for a wide...