| This is a complete set of high performance valve springs for all L 4 engines. It includes 8 chrome silicon dual valve springs which is enough to do one 4 cylinder L series engine, regardless of size. It does not include retainers, those must be purchased separately, see listing. These should be used with high performance cams. Be sure to check the condition of your rocker arms and lash pads as well. These springs increase seat pressure to 110 psi. This helps eliminate valve floating at higher revs. The stock valve springs are only good to about 6700 rpm. Last update 07/10 | 
