Howards Single Spring/Damper Valve Spring Kit - 380 lb/in Rate - 1.265" OD - Steel Cups/Locks/Retainers 3550224-9151- L NEW PATENTED ADJUSTABLE MUFFLER DESIGN

NEW PATENTED ADJUSTABLE MUFFLER DESIGN ALLOWS ADJUSTMENT OF SOUND AND EXHAUST FLOW FOR A GREAT PERFORMANCE SOUNDING EXHAUST

GM Fullsize Truck 2004-05

w/Maximum Velocity At Ports

Backed by a limited lifetime warrantyGreat looking

Howards Single Spring/Damper Valve Spring Kit - 380 lb/in Rate - 1.265" OD - Steel Cups/Locks/Retainers 3550224-9151- L NEW PATENTED ADJUSTABLE MUFFLER DESIGNProduct Description: Valve Spring Kit Single Spring Damper 430 lb in Rate 1. 100 in Coil Bind 1. 265 in OD Locks Chromoly Retainers 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