Manley Performance 1.600 Head Diameter / 5.080 OA Length Race Flo Exhaust Valves - Set of 8 | Multiple Fitments (11889-8)

Ford 289 - 302 - 351W Race Flo 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: 1.600"
• Stem Diameter: .3415”
• Installed Height: Stock
• O/A Length: 5.080"
• Tip Length: .395"
• Underhead Angle/Radius: Pro Flo 15° x 1/2” .
• Margin: .060”
• Seat Width: .100”
• Top Of Head: 9° Dish
• Chrome Stems and Hard Tips
• Swirl Polished and Fully Machined
• XH-426 Stainless Exhaust 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
• Up to 40% flow increase in small port OE style cylinder heads
• Proven performance improvement on the flow bench

Please Note: FOR USE WITH RAIL TYPE ROCKERS

Applications

• 1968–1974 Ford Galaxie
• 1968–1970 Ford Mustang
• 1969–1971 Mercury Cougar
• 1969–1991 Ford Country Squire
• 1969-1970 Ford Fairlane (Americas)
• 1970–1976 Ford Torino
• 1974–1976 Ford Elite
• 1975–1996 Ford E series
• 1977–1979 Ford LTD II
• 1977–1979 Ford Thunderbird
• 1979–1996 Ford Bronco
• 1979–1982 Ford LTD (Americas)
• 1987–1997 Ford F-Series
• 1977–1979 Mercury Cougar (station wagons only)
• 1978, 1986–1991 Mercury Colony Park
• 1978–1982 Mercury Marquis
• 1986–1991 Mercury Grand Marquis
• 1980 Continental Mark VI
• 1995 Ford Mustang SVT Cobra R

What's In The Box?

• 8 - Valves

Warranty

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