Manley Performance 1.615 Head DIA / .3136 Stem DIA Race Master Exhaust Valves – Set of 8 | 2006–2013 Chevrolet Corvette / 2014–2015 Chevrolet Camaro Z28 (11689-8) Manley Performance

Chevrolet LS7 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: 1.615″
• Stem Diameter: .3136″
• Installed Height: Stock
• O/A Length: 5.230″
• Tip Length: .290″
• Underhead Angle/Radius: 25° x 7/16”
• Margin: .075”
• Seat Width: .100″
• Top Of Head: 18° Dish
• O.E. Style Radius Keeper Grooves
• Chrome Stems and Hard Tips
• Swirl Polished and Fully Machined
• XH-426 Stainless Exhaust Material

Benefits

• Suited for 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

• 2006 – 2013 Chevrolet Corvette Z06
• 2013 Corvette 427 Convertible
• 2014 – 2015 Chevrolet Camaro Z/28

What’s In The Box?

• 8 – Valves

Warranty

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