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

3 in Backspace

and highly-specialized silicone magnetic steel cores

Five individual shell sizes for the lowest profile possible

Designed to mount the alternator low on the driver's side

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