Supertech Valve stem seal suitable for Toyota GT86 & Subaru BRZ FA20
Sport valve spring set from Supertech made of high quality tempered steel with titanium spring plates for all FA20 Boxer engines.These valve springs have an extra adjusted spring rate.- Better and faster response- Higher engine speed possible- Lighter valve train due to titanium plates- Absolutely stable for high rpm Outer spring outer diameter:29,05mmOuter spring inner diameter:21,85mmInner spring outer diameter:20,50mmInner spring inner diameter:15,50mmValve seat pressure:33,57kg/33,5mmPressure open:78,93kg/10mmMax. Stroke:14.00mmMin. spring height (when compressed):19.50mmSpring rate in lbs./mm:10.00Included in kit: Outer spring outer diameter: Outer spring inner diameter: Inner spring outer diameter: Valve seat pressure Pressure open: Max. Stroke: Min. spring height (when compressed): Spring rate in lbs./mm: 16 valve springs Spring retainer made of titanium top Spring retainer from steel below
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