High quality 140lb dual valve spring set for standard to lightly modified engines. Even light performance camshafts require stronger valve springs to prevent valve float at higher rpms, and these springs are a perfect fit for standrd to mild camshafts. These springs are made out of high quality silicone spring wire and can be used with standard or upgraded top caps.
 
Advisable for engines using cams up to .400" of lift and capable of up to 7000rpm. If you have a mild to moderate camshaft consider upgrading to our 200lb springs (C-AEA526).