Jim Evans valve spring kit - designed to complement our range of performance / race camshafts and valve gear.
Under extreme use some competition valve springs can bind their inner and outer springs - these will not.
Recommended installed valve spring height for cams up to 12mm lift - 35mm.
Above 12mm add the difference in lift to the fitted length, eg for 12.5mm fitted length should be 35.5mm
Please use valve spring retainer EN600 when using this valve spring set.