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Valves Spring/Retainer Kits Rods Pistons Crankshafts / Rotating Assemblies
EJ20 / EJ25 - RACE SERIES VALVES / EXTREME DUTY VALVES - learn more about our valves

Manley valves have set the standard for excellence in quality, material and design in the performance world for four decades. Manufactured from proven Race Master materials, Manley valves feature chrome stems, hard tips, fully machined surfaces and swirl polished radii. Many applications are Pro Flow design for maximum air flow. For extreme conditions, XtremeAlloy material comes standard for exhaust valves.

Note: Manley Performance strongly recommends that customers check their valve guide size in order to achieve the proper valve stem to guide clearance. Guides may need to be honed when replacing stock factory valves.

 
Part # Type Head Diameter Stem Diameter Installed Height O/A Length Tip Length Underhead Angle/Radius Margin Seat Width Top of Head
11155-8 Exh. 32 mm 5.96mm/.2345" Stock 104.75 mm 3.5 mm 25° x 11/32" .060 .080" 20° Dish
11171-8 Exh. 33 mm 5.96mm/.2345" Stock 104.75 mm 3.5 mm 25° x 11/32" .060 .080" 20° Dish
11137-8* Exh. 32 mm 5.96mm/.2345" Stock 104.75 mm 3.5 mm 25° x 11/32" .060 .100 20° Dish
11139-8* Exh. 33 mm 5.96mm/.2345" Stock 104.75 mm 3.5 mm 25° x 11/32" .060 .100 20° Dish
11138-8 Int. 36 mm 5.97mm/.2350" Stock 104.6 mm 3.5 mm Pro Flo: 22° x 5/16" .050 .080" 17° Dish
11140-8 Int. 37 mm 5.97mm/.2350" Stock 104.6 mm 3.5 mm Pro Flo: 22° x 5/16" .050 .080" 17° Dish
* ExtremeAlloy Material
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