Manley Performance Valves


Manley
Manley Performance Valves

Product images may differ from actual product appearance.

Sold individually, all Manley valves are held to the highest standards. Swirl-polished heads, chromed stems, and hardened tips provide the advantage you expect from America's premier performance valve manufacturer. Valve types/detail below.

  Budget Performance Replacement

  • For stock rebuild or mild performance applications
  • Superior to OE construction in every aspect

    Street Flo
  • For street/strip applications
  • Fully-machined combustion faces and necked-down stems

    Street Master
  • For bracket racer engines and street performance
  • Straight stems provide extra meat for outstanding durability

    Race Flo
  • For mild drag or circle track engines and street performance
  • Necked-down stems for less weight and more flow

    Race Master
  • For mild drag or circle track engines and street performance
  • Similar to Race Flo valves except with straight stems

    Pro Flo
  • For drag, circle track, and hot street engines
  • Stainless steel undercut design for less weight and up to 40% more flow

    Severe Duty
  • For applications with high spring pressures and high RPMs
  • One-piece stainless steel design



  • SB-Chevy with 11/32" stem
      660-10576-1
    Budget Performance Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 1.940"
  • Stem Diameter: .3415"
  • $7.99
    Ships
      660-10550-1
    Budget Performance Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 2.020"
  • Stem Diameter: .3415"
  • $6.99
    Ships
    in 6 days
      660-10552-1
    Budget Performance Valve
  • Type: Intake
  • Length: +.100"
  • Head Diameter: 2.020"
  • Stem Diameter: .3415"
  • $7.99
    Ships
      660-10554-1
    Budget Performance Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 2.055"
  • Stem Diameter: .3415"
  • $7.99
    Ships
    in 4 days
      660-10577-1
    Budget Performance Valve
  • Type: Exhaust
  • Length: Standard
  • Head Diameter: 1.500"
  • Stem Diameter: .3415"
  • $7.99
    Ships
      660-10549-1
    Budget Performance Valve
  • Type: Exhaust
  • Length: Standard
  • Head Diameter: 1.600"
  • Stem Diameter: .3415"
  • $7.99
    Ships
    Manley 10549-8 - Manley Performance Valves
    660-10549-8
    Budget Performance Valve
  • Type: Exhaust
  • Length: Standard
  • Head Diameter: 1.600"
  • Stem Diameter: .3415
  • $56.99
    Ships
    in 6 days
    Manley 10551-1 - Manley Performance Valves
    660-10551-1
    Budget Performance Valve
  • Type: Exhaust
  • Length: +.100"
  • Head Diameter: 1.600"
  • Stem Diameter: .3415"
  • $7.99
    Ships
      660-10722-1
    Street Flo Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 1.940"
  • Stem Diameter: .3415"
  • $12.99
    Ships
    Manley 10766-1 - Manley Performance Valves
    660-10766-1
    Street Flo Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 2.020"
  • Stem Diameter: .3415"
  • $12.99
    Ships
      660-10721-1
    Street Flo Valve
  • Type: Exhaust
  • Length: Standard
  • Head Diameter: 1.500"
  • Stem Diameter: .3415"
  • $12.99
    Ships
    Manley 10765-1 - Manley Performance Valves
    660-10765-1
    Street Flo Valve
  • Type: Exhaust
  • Length: Standard
  • Head Diameter: 1.600"
  • Stem Diameter: .3415"
  • $12.99
    Ships
    in 6 days
    Manley 10765-8 - Manley Performance Valves
    660-10765-8
    Street Flo Valve
  • Type: Exhaust
  • Length: Standard
  • Head Diameter: 1.600"
  • Stem Diameter: .3415"
  • $85.99
    Ships
    11/24/09
      660-10776-1
    Street Master Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 1.940"
  • Stem Diameter: .3415"
  • $12.99
    Ships
    in 4 days
      660-10750-1
    Street Master Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 2.020"
  • Stem Diameter: .3415"
  • $12.99
    Ships
      660-10752-1
    Street Master Valve
  • Type: Intake
  • Length: +.100"
  • Head Diameter: 2.020"
  • Stem Diameter: .3415"
  • $11.99
    Ships
      660-10754-1
    Street Master Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 2.055"
  • Stem Diameter: .3415"
  • $11.99
    Ships
    Manley 10754-8 - Manley Performance Valves
    660-10754-8
    Street Master Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 2.055"
  • Stem Diameter: .3415"
  • $85.99
    Ships
    in 4 days
      660-10756-1
    Street Master Valve
  • Type: Intake
  • Length: +.100"
  • Head Diameter: 2.055"
  • Stem Diameter: .3415"
  • $11.99
    Ships
    in 4 days
      660-10777-1
    Street Master Valve
  • Type: Exhaust
  • Length: Standard
  • Head Diameter: 1.500"
  • Stem Diameter: .3415"
  • $12.99
    Ships
    in 4 days
      660-10749-1
    Street Master Valve
  • Type: Exhaust
  • Length: Standard
  • Head Diameter: 1.600"
  • Stem Diameter: .3415"
  • $12.99
    Ships
    Manley 10749-8 - Manley Performance Valves
    660-10749-8
    Street Master Valve
  • Type: Exhaust
  • Length: Standard
  • Head Diameter: 1.600"
  • Stem Diameter: .3415"
  • $85.99
    Ships
    11/29/09
      660-10751-1
    Street Master Valve
  • Type: Exhaust
  • Length: +.100"
  • Head Diameter: 1.600"
  • Stem Diameter: .3415"
  • $11.99
    Ships
      660-11522-1
    Race Flo Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 1.940"
  • Stem Diameter: .3415"
  • $16.99
    Ships
      660-11500-1
    Race Flo Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 2.000"
  • Stem Diameter: .3415"
  • $16.99
    Ships
    in 4 days
    Manley 11522-8 - Manley Performance Valves
    660-11522-8
    Race Flo Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 1.940"
  • Stem Diameter: .3415"
  • $112.99
    Ships
    in 4 days
      660-11568-1
    Race Flo Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 2.055"
  • Stem Diameter: .3415"
  • $16.99
    Ships
    Manley 11546-8 - Manley Performance Valves
    660-11546-8
    Race Flo Valve
  • Type: Intake
  • Length: .100'' Longer
  • Head Diameter: 2.055"
  • Stem Diameter: .3415"
  • Set of 8
  • $99.99
    Ships
    in 4 days
      660-11576-1
    Race Flo Valve
  • Type: Intake
  • Length: +.100"
  • Head Diameter: 2.100"
  • Stem Diameter: .3415"
  • $22.99
    Ships
    in 4 days
      660-11521-1
    Race Flo Valve
  • Type: Exhaust
  • Length: Standard
  • Head Diameter: 1.500"
  • Stem Diameter: .3415"
  • $16.99
    Ships
      660-11501-1
    Race Flo Valve
  • Type: Exhaust
  • Length: Standard
  • Head Diameter: 1.560"
  • Stem Diameter: .3415"
  • $16.99
    Ships
    in 4 days
    Manley 11565-1 - Manley Performance Valves
    660-11565-1
    Race Flo Valve
  • Type: Exhaust
  • Length: Standard
  • Head Diameter: 1.600"
  • Stem Diameter: .3415"
  • $16.99
    Ships
    Manley 11565-8 - Manley Performance Valves
    660-11565-8
    Race Flo Valve
  • Type: Exhaust
  • Length: Standard
  • Head Diameter: 1.600"
  • Stem Diameter: .3415"
  • 8/pkg
  • $112.99
    Ships
    Manley 11566-8 - Manley Performance Valves
    660-11566-8
    Race Flo Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 2.020"
  • Stem Diameter: .3415"
  • 8/pkg
  • $112.99
    Ships
      660-11864-1
    Race Master Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 2.020"
  • Stem Diameter: .3415"
  • $14.99
    Ships
      660-11318-1
    Race Master Valve
  • Type: Intake
  • Length: +.100"
  • Head Diameter: 2.020"
  • Stem Diameter: .3415"
  • $14.99
    Ships
      660-11810-1
    Race Master Valve
  • Type: Intake
  • Length: +.100"
  • Head Diameter: 2.055"
  • Stem Diameter: .3415"
  • $14.99
    Ships
    in 4 days
      660-11808-1
    Race Master Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 2.080"
  • Stem Diameter: .3415"
  • $16.99
    Ships
      660-11328-1
    Race Master Valve
  • Type: Intake
  • Length: +.100"
  • Head Diameter: 2.100"
  • Stem Diameter: .3415"
  • $15.99
    Ships
    in 4 days
      660-11863-1
    Race Master Valve
  • Type: Exhaust
  • Length: Standard
  • Head Diameter: 1.600"
  • Stem Diameter: .3415"
  • $14.99
    Ships
      660-11877-1
    Race Master Valve
  • Type: Exhaust
  • Length: +.100"
  • Head Diameter: 1.600"
  • Stem Diameter: .3415"
  • $16.99
    Ships
      660-11879-1
    Race Master Valve
  • Type: Exhaust
  • Length: +.100"
  • Head Diameter: 1.625"
  • Stem Diameter: .3415"
  • $14.99
    Ships
    in 4 days
      660-11830-1
    Pro Flo Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 2.020"
  • Stem Diameter: .3415"
  • $25.99
    Ships
    Manley 11823-8 - Manley Performance Valves
    660-11823-8
    Pro Flo Valve
  • Type: Exhaust
  • Length: +.100''
  • Head Diameter: 1.600"
  • Stem Diameter: .3415"
  • 8/pkg
  • $183.99
    Ships
      660-11827-1
    Pro Flo Valve
  • Type: Exhaust
  • Length: Standard
  • Head Diameter: 1.600"
  • Stem Diameter: .3415"
  • $25.99
    Ships
    Manley 11545-8 - Manley Performance Valves
    660-11545-8
    Pro Flo Valve
  • Type: Exhaust
  • Length: +.100"
  • Head Diameter: 1.600"
  • Stem Diameter: .3415"
  • $114.99
    Ships
    in 4 days
      660-11596-1
    Severe Duty Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 2.020"
  • Stem Diameter: .3415"
  • $25.99
    Ships
    in 4 days
      660-11826-1
    Severe Duty Valve
  • Type: Intake
  • Length: +.100"
  • Head Diameter: 2.020"
  • Stem Diameter: .3415"
  • $26.99
    Ships
    in 4 days
      660-11598-1
    Severe Duty Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 2.055"
  • Stem Diameter: .3415"
  • $23.99
    Ships
    in 4 days
      660-11846-1
    Severe Duty Valve
  • Type: Intake
  • Length: +.100"
  • Head Diameter: 2.055"
  • Stem Diameter: .3415"
  • $25.99
    Ships
      660-11818-1
    Severe Duty Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 2.080"
  • Stem Diameter: .3415"
  • $25.99
    Ships
    in 4 days
      660-11844-1
    Severe Duty Valve
  • Type: Intake
  • Length: +.100"
  • Head Diameter: 2.080"
  • Stem Diameter: .3415"
  • $25.99
    Ships
      660-11543-1
    Severe Duty Valve
  • Type: Exhaust
  • Length: Standard
  • Head Diameter: 1.600"
  • Stem Diameter: .3415"
  • $25.99
    Ships
      660-11539-1
    Severe Duty Valve
  • Type: Exhaust
  • Length: +.100"
  • Head Diameter: 1.600"
  • Stem Diameter: .3415"
  • $25.99
    Ships
      660-11541-1
    Severe Duty Valve
  • Type: Exhaust
  • Length: Standard
  • Head Diameter: 1.625"
  • Stem Diameter: .3415"
  • $22.99
    Ships
    in 4 days
      660-11537-1
    Severe Duty Valve
  • Type: Exhaust
  • Length: +.100"
  • Head Diameter: 1.625"
  • Stem Diameter: .3415"
  • $25.99
    Ships
    in 4 days
      660-11567-1
    Severe Duty Valve
  • Type: Exhaust
  • Length: Standard
  • Head Diameter: 1.500"
  • Stem Diameter: .3415"
  • $23.99
    Ships
    in 4 days
    BB-Chevy with 3/8" stem
      660-10714-1
    Street Flo Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 2.065"
  • Stem Diameter: .3715"
  • $12.99
    Ships
      660-10728-1
    Street Flo Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 2.190"
  • Stem Diameter: .3715"
  • $12.99
    Ships
    in 6 days
      660-10726-1
    Street Flo Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 2.250"
  • Stem Diameter: .3715"
  • $11.99
    Ships
      660-10717-1
    Street Flo Valve
  • Type: Exhaust
  • Length: Standard
  • Head Diameter: 1.725"
  • Stem Diameter: .3715"
  • $12.99
    Ships
      660-10727-1
    Street Flo Valve
  • Type: Exhaust
  • Length: Standard
  • Head Diameter: 1.880"
  • Stem Diameter: .3715"
  • $12.99
    Ships
    Manley 11514-1 - Manley Performance Valves
    660-11514-1
    Race Flo Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 2.065"
  • Stem Diameter: .3715"
  • $16.99
    Ships
    11/29/09
      660-11528-1
    Race Flo Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 2.190"
  • Stem Diameter: .3715"
  • $16.99
    Ships
      660-11526-1
    Race Flo Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 2.250"
  • Stem Diameter: .3715"
  • $16.99
    Ships
      660-11517-1
    Race Flo Valve
  • Type: Exhaust
  • Length: Standard
  • Head Diameter: 1.725"
  • Stem Diameter: .3715"
  • $16.99
    Ships
      660-11527-1
    Race Flo Valve
  • Type: Exhaust
  • Length: Standard
  • Head Diameter: 1.880"
  • Stem Diameter: .3715"
  • $16.99
    Ships
      660-11832-1
    Pro Flo Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 2.190"
  • Stem Diameter: .3720"
  • $23.99
    Ships
    in 4 days
      660-11831-1
    Pro Flo Valve
  • Type: Exhaust
  • Length: Standard
  • Head Diameter: 1.880"
  • Stem Diameter: .3715"
  • $23.99
    Ships
    in 4 days
      660-11520-1
    Severe Duty Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 2.190"
  • Stem Diameter: .3720"
  • $25.99
    Ships
      660-11538-1
    Severe Duty Valve
  • Type: Intake
  • Length: +.100"
  • Head Diameter: 2.190"
  • Stem Diameter: .3720"
  • $23.99
    Ships
    in 4 days
      660-11562-1
    Severe Duty Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 2.250"
  • Stem Diameter: .3720"
  • $25.99
    Ships
      660-11524-1
    Severe Duty Valve
  • Type: Intake
  • Length: +.100"
  • Head Diameter: 2.250"
  • Stem Diameter: .3720"
  • $22.99
    Ships
      660-11530-1
    Severe Duty Valve
  • Type: Intake
  • Length: +.100"
  • Head Diameter: 2.300"
  • Stem Diameter: .3720"
  • $23.99
    Ships
    in 4 days
      660-11563-1
    Severe Duty Valve
  • Type: Exhaust
  • Length: Standard
  • Head Diameter: 1.880"
  • Stem Diameter: .3715"
  • $25.99
    Ships
      660-11525-1
    Severe Duty Valve
  • Type: Exhaust
  • Length: +.100"
  • Head Diameter: 1.880"
  • Stem Diameter: .3715"
  • $23.99
    Ships
    in 4 days
      660-11561-1
    Severe Duty Valve
  • Type: Exhaust
  • Length: Standard
  • Head Diameter: 1.940"
  • Stem Diameter: .3715"
  • $22.99
    Ships
    in 4 days
    BB-Chevy with 11/32" stem
      660-11872-1
    Race Master Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 2.190"
  • Stem Diameter: .3415"
    More info on Manley 11872-1
  • $16.99
    Ships
      660-11874-1
    Race Master Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 2.250"
  • Stem Diameter: .3415"
    More info on Manley 11874-1
  • $16.99
    Ships
      660-11842-1
    Race Master Valve
  • Type: Intake
  • Length: +.100"
  • Head Diameter: 2.300"
  • Stem Diameter: .3415"
  • $24.99
    Ships
    in 4 days
      660-11800-1
    Severe Duty Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 2.190"
  • Stem Diameter: .3415"
    More info on Manley 11800-1
  • $25.99
    Ships
    Manley 11802-1 - Manley Performance Valves
    660-11802-1
    Severe Duty Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 2.250"
  • Stem Diameter: .3415"
    More info on Manley 11802-1
  • $25.99
    Ships
      660-11850-1
    Severe Duty Valve
  • Type: Intake
  • Length: +.100"
  • Head Diameter: 2.250"
  • Stem Diameter: .3415"
    More info on Manley 11850-1
  • $22.99
    Ships
      660-11854-1
    Severe Duty Valve
  • Type: Intake
  • Length: +.250"
  • Head Diameter: 2.300"
  • Stem Diameter: .3415"
  • $24.99
    Ships
    Manley 11843-1 - Manley Performance Valves
    660-11843-1
    Severe Duty Valve
  • Type: Exhaust
  • Length: Standard
  • Head Diameter: 1.880"
  • Stem Diameter: .3415"
  • $25.99
    Ships
    Manley 11843-8 - Manley Performance Valves
    660-11843-8
    Severe Duty Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 1.880"
  • Stem Diameter: .3415"
  • 8/pkg
  • $171.99
    Ships
    in 4 days
      660-11815-1
    Severe Duty Valve
  • Type: Exhaust
  • Length: +.100"
  • Head Diameter: 1.880"
  • Stem Diameter: .3415"
  • $25.99
    Ships
    Manley 11854-8 - Manley Performance Valves
    660-11854-8
    Severe Duty Valve
  • Type: Intake
  • Length: +.250''
  • Head Diameter: 2.300"
  • Stem Diameter: .3415"
  • 8/pkg
  • $183.99
    Ships
      660-11878-8
    Severe Duty Valve
  • Type: Intake
  • Length: +.350''
  • Head Diameter: 2.300"
  • Stem Diameter: .3415"
  • 8/pkg
  • $193.99
    Ships
    SB-Ford with 11/32" stem (for use with non-rail or roller rockers)
      660-11532-1
    Race Flo Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 1.940"
  • Stem Diameter: .3415"
  • $16.99
    Ships
    in 4 days
    Manley 11566-1 - Manley Performance Valves
    660-11566-1
    Race Flo Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 2.020"
  • Stem Diameter: .3415"
  • $16.99
    Ships
      660-11531-1
    Race Flo Valve
  • Type: Exhaust
  • Length: Standard
  • Head Diameter: 1.600"
  • Stem Diameter: .3415"
  • $16.99
    Ships
    SB-Ford with 11/32" stem (for use with rail-type rockers)
      660-11572-1
    Race Flo Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 1.785"
  • Stem Diameter: .3415"
  • $16.99
    Ships
      660-11578-1
    Race Flo Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 1.850"
  • Stem Diameter: .3415"
  • $16.99
    Ships
    in 4 days
      660-11523-1
    Race Flo Valve
  • Type: Exhaust
  • Length: Standard
  • Head Diameter: 1.465"
  • Stem Diameter: .3415"
  • $16.99
    Ships
      660-11575-1
    Race Flo Valve
  • Type: Exhaust
  • Length: Standard
  • Head Diameter: 1.550"
  • Stem Diameter: .3415"
  • $16.99
    Ships
    in 4 days
    Ford 351C with 11/32" stem
      660-11873-1
    Race Master Valve
  • Type: Exhaust
  • Length: Standard
  • Head Diameter: 1.710"
  • Stem Diameter: .3415"
    More info on Manley 11873-1
  • $16.99
    Ships
      660-11805-1
    Severe Duty Valve
  • Type: Exhaust
  • Length: Standard
  • Head Diameter: 1.710"
  • Stem Diameter: .3415"
    More info on Manley 11805-1
  • $23.99
    Ships
    Ford 429-460 with 11/32" stem
      660-11875-1
    Race Master Valve
  • Type: Exhaust
  • Length: Standard
  • Head Diameter: 1.760"
  • Stem Diameter: .3415"
  • $16.99
    Ships
    in 4 days
      660-11529-1
    Severe Duty Valve
  • Type: Exhaust
  • Length: Standard
  • Head Diameter: 1.760"
  • Stem Diameter: .3415"
  • $25.99
    Ships
      660-11801-1
    Severe Duty Valve
  • Type: Exhaust
  • Length: +.100"
  • Head Diameter: 1.760"
  • Stem Diameter: .3415"
  • $23.99
    Ships
    BB-Chrysler with 3/8" stem
      660-11890-1
    Race Flo Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 2.140"
  • Stem Diameter: .3725"
  • $16.99
    Ships
      660-11891-1
    Race Flo Valve
  • Type: Exhaust
  • Length: Standard
  • Head Diameter: 1.810"
  • Stem Diameter: .3720"
  • $16.99
    Ships
      660-11834-1
    Severe Duty Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 2.140"
  • Stem Diameter: .3725"
  • $23.99
    Ships
    in 4 days
      660-11839-1
    Severe Duty Valve
  • Type: Exhaust
  • Length: Standard
  • Head Diameter: 1.810"
  • Stem Diameter: .3720"
  • $23.99
    Ships
    in 4 days
    Buick 3.8L Turbo with 11/32" stem
      660-11504-1
    Severe Duty Valve
  • Type: Intake
  • Length: Standard
  • Head Diameter: 1.775"
  • Stem Diameter: .3415"
  • $17.99
    Ships
    in 4 days

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