GSC P-D Chrome Polished Super Alloy Exhaust Valve 32mm Head (STD) - Subaru WRX 2002-2014 / STi 2004-2020 (Set of 8; +Multiple Subaru Fitments) Volkswagen-CC-2011 The Vulcan is available in

The Vulcan is available in 17”

but designing this kit to be perfectly balanced was a requirement

Seibon products have proven to be as strong as the driver's ambition to win

Below is a dyno chart provided by Iroz Motorsport in a 3rd party test

GSC P-D Chrome Polished Super Alloy Exhaust Valve 32mm Head (STD) - Subaru WRX 2002-2014 / STi 2004-2020 (Set of 8; +Multiple Subaru Fitments) Volkswagen-CC-2011 The Vulcan is available inStem Diameter (mm) Overall Length (mm) Head Diameter (mm) 6. 0 104. 65 32. 00 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.