Tomei HEAD GASKET EJ255 06-08 WRX/EJ257 WRX STI 04+ 101.2-1.2mm WASHER SET however the stock blow off

however the stock blow off valve tends to keep releasing boost under high boost and it causes poor response and less peak power

25 IN 1417260102 EX 1418260102 R33(2rd)

This will greatly improve reliability and reduce the chances of problems

45 115 PONCAM RB25DE(T)

0 × 60°×60° TC 160 106 10 8 1

Tomei HEAD GASKET EJ255 06-08 WRX/EJ257 WRX STI 04+ 101.2-1.2mm WASHER SET however the stock blow offPRODUCT INFO APPLICATION BORE THICKNESS P N MATERIAL STRUCTURE NOTES EJ255 06 08 WRX EJ257 WRX STI 04 101. 2 0. 7mm 1361101071 Metal Super Grommet 2p Set 1. 0mm 1361101101 1. 2mm 1361101121 1. 5mm 1361101151 FEATURE SPEC SUPER GROMMET DESIGN Although the stock product is not metal, yet the sealing performance is limited due to the grommet type design. The sealing performance has been improved considerably with the super grommet,to suit these engines