GSC EJ series Chrome Polished Super Alloy Exhaust Valve-33mm Head(+1mm)-SET of 8 Oiling The XP series is a

The XP series is a line of bearings with advanced metallurgical and geometric technologies that meet extreme performance loads

2013 Subaru Impreza WRX STI Limited 2

and N25 cylinder heads found on the 04+ STI and other EJ257 applications

You can expect faster spool up time compared to long primary/double secondary designs

GSC EJ series Chrome Polished Super Alloy Exhaust Valve-33mm Head(+1mm)-SET of 8 Oiling The XP series is aStem Diameter (mm) 6. 0mm Overall Length (mm) 104. 25mm Head Diameter (mm) 33mm GSC Power Division Super Alloy Exhaust Valves for EJ20 25 Turbo are for those running high horsepower, high EGT set ups that need a valve that will last in 2000F conditions. The Super Alloy Exhaust valves have chrome polished stems to create a smooth, durable finish for added life and better lubricity, especially when paired with the GSC Manganese bronze valve guides.