Howards Max Effort„¢ Dual Racing Valve Springs - 1.437" O.D. - .800" I.D. DK1423641SFI diesel and Ethanol/Methanol (E85) fuels

diesel and Ethanol/Methanol (E85) fuels

5 in ID to 1

and highly-specialized silicone magnetic steel cores

3 in Backspace

Howards Max Effort„¢ Dual Racing Valve Springs - 1.437" O.D. - .800" I.D. DK1423641SFI diesel and Ethanol/Methanol (E85) fuelsEngineered 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