Ford 4.6L & 5.4L 4 Valve Bead Lock 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: 31mm
• Stem Diameter: .2740”
• Installed Height: Stock
• O/A Length: 4.587"
• Tip Length: .440"
• Underhead Angle/Radius: 15° x 1/2”
• Margin: .050”
• Seat Width: .080"
• Top Of Head: 9° Dish
• Chrome Stems and Hard Tips
• Swirl Polished and Fully Machined
• XH-426 Exhaust Stainless Material

Benefits

• Best for drag and oval track racers operating below 8000 rpm - above which engine speed titanium valves are generally required
• Equal to the best that the competitors have to offer

Please Note: Must use factory locks for triple grooves and use Manley’s Bead Loc® P/N 13089-32 with the Bead Loc® single radius groove.

Applications

• 1996–2004 Ford Mustang SVT Cobra
• 2003-2004 Ford Mustang Mach 1
• 2007–2012 Ford Shelby GT500
• 2004–2006 Ford GT

What's In The Box?

• 8 - Valves

Warranty

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