Manley Performance 33mm Race Master Exhaust Valves - Set of 8 | 2002-2011 Subaru WRX / STi (11171-8)

2002-2011 Subaru WRX / STi Race Master Exhaust Valves - Set of 8 by Manley Performance

Race Master, and the Pro Flo versions identified as Race Flo valves, are manufactured of XH-426 material for the exhausts and NK-842 for the intakes. This series of valves is targeted at the bracket, drag and oval track racers operating below 8000 rpm - above which engine speed titanium valves are generally required.

Any engine builder successfully using EV-8 alloy ( 21-4N ) valves will find in this series of Manley valves a superior piece at a most attractive price. The Ultimate Tensile Strength charts on this page and the next, show the Manley Race Series to be equal to the best that the competitors have to offer.

Features

• Head Diameter: 33mm
• Stem Diameter: 5.96mm/.2345”
• Installed Height: Stock
• O/A Length: 104.75mm
• Tip Length: 3.5mm
• Underhead Angle/Radius: 25° x 11/32”
• Margin: .060"
• Seat Width: .080"
• Top of Head: 20° Dish
• Swirl Polished and Fully Machined
• XH-426 Stainless Exhaust Material
• Chrome Stems and Hard Tips

Benefits

• Recommended Exhaust Valves for Alcohol Engines
• Suits drag and oval track racers operating below 8000 rpm

Please Note: The image provided is generic and may not be an accurate representation of the product you will receive

Applications

• 2002-2005 Subaru Impreza WRX
• 2004-2011 Subaru Impreza WRX STI
• 2007,2011 Subaru Impreza WRX STI Limited
• 2010 Subaru Impreza WRX STI Special Edition

What's In The Box?

• 8 - Valves

Warranty

• Manley products, due to their intended use, are sold without warranty.