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VR38 - 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.

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.

For extreme conditions, XtremeAlloy material is available for custom exhaust valves. Please contact the factory direct for more details.

 
Part # Type Head Diameter Stem Diameter O/A Length Tip Length Underhead Angle/Radius Margin Seat Width Top of Head
  Nissan GT-R 3.8L - DOHC 24 Valve (VR38DETT)
11193-12 Exh. 32.15 mm 5.96 mm / .2345" 92 mm 2.16 mm 25 x 11/32" .060" .100" Dimple
11195-12 Exh. 33.15 mm 5.96 mm / .2345" 92 mm 2.16 mm 25 x 11/32" .060" .100" Dimple
11190-12 Int. 37.15 mm 5.97 mm / .2350" 95 mm 4.95 mm 25 x 11/32" .050" .100" Flat Face
11192-12 Int. 38.15 mm 5.97 mm / .2350" 95 mm 4.95 mm 25 x 11/32" .050" .100" Flat Face
NOTE: Tip area is reduced in diameter to 5.46mm for compatibility with factory locks and retainers.
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