Mugen K-Series iVTEC i-VTEC Head Gasket 12251-XK5-0000
A two-layer construction is used instead of the normal three-layer gasket plate construction, and a rib (+0.07mm) is laser-welded close to the plate surface sleeve to prevent blowout occurring at high compression. This head gasket raises the compression ratio by 0.4 points. Construction is entirely of stainless steel. Mugen part number: 12251-XK5-0000
Fits: ALL RSXs 02+, ALL Civic Si 02+
*B Series headgasket shown, don't worry, you'll be getting the K series ones.