Part Number: 11139-8

Description: Extreme Duty Valves; Exhaust; Set of 8

Head Diameter: 33mm

Installed Height: Stock

Margin: 0.06

O/A Length: 104.75mm

Seat Width: 0.1

Stem Diameter: 5.96mm/.2345"

Tip Length: 3.5mm

Top of Head: 20° Dish

Underhead Angle/Radius: 25° x 11/32"

Fitment: 02-05 Subaru WRX & 04-07 STI

Details:

The exhaust valves have been crafted from a XH-426 stainless exhaust material, and the intake valves have been crafted from NK-842 stainless steel.These valves also feature chrome stems, as well as hard tips, and the design will provide improved flow with the “Pro Flo” underhead.

The valves are finished off with a fully machined, swirl polished finish, and come with a 33mm head diameter.