Howards Performance Single Racing Valve Springs w/ Damper - 1.265" O.D. - .875" I.D. Spark Plug Boot Sleeve Hedman Hedders 3" Mild Steel

Hedman Hedders 3" Mild Steel Collector Ball Flange Kit

Ignition Plug and Play with GM HEI

Includes FP Pro Cal 4 Calibration Delivery Tool M-12655-F

Holley Fast Kit for 4150 Ultra HP Carburetors

2006-2007 Mercury Grand Marquis

Howards Performance Single Racing Valve Springs w/ Damper - 1.265" O.D. - .875" I.D. Spark Plug Boot Sleeve Hedman Hedders 3" Mild SteelEngineered for racing use, springs are precisely coiled and undergo precision heat treating. Sold in sets 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, Drag