Howards Performance Hydraulic Roller Dual Valve Springs - 300 lb/in - 1.437 OD H764C34M Bolts are included for use

Bolts are included for use on tubing up to 1-5/8"

Durable steel construction with rubber hand grips

Refer to our instructions for more information

Provides quicker warm-up temperatures

Features: Fuel Rail Kit with Sniper logo for OE LS3 manifold

Howards Performance Hydraulic Roller Dual Valve Springs - 300 lb/in - 1.437 OD H764C34M Bolts are included for useProduct Description: Valve Spring Dual Spring Damper 300 lb in Spring Rate 1. 125 in Coil Bind 1. 437 in OD Set of 16 The name Howards Cams has been synonymous with high performance camshafts since the 1950s. Howards Cams have always used on track experience to design the most powerful designs. This includes early Top Fuel favorites driven by Jack Chrisman and Larry Dixon Sr. Today we have even a greater group of experienced racers in Circle Track,