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3-Bolt Flange Header Reducers 3" Diameter Collector
InfoVehicle Info Needed
HEDMANPART NUMBER: 500-21118

3-Bolt Flange Header Reducers 3" Diameter Collector

$3899
1 left in stock
ShippingShips on Nov 16, 2026
Lowest PriceLowest Price Guarantee
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$800
Steel Reducers without O2 Fittings [3 in. Collector to 3 in. I.D.]

555-30035

Steel Reducers without O2 Fittings [3 in. Collector to 3 in. I.D.]

$3099

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Header Reducers
  • 2/pkg
      • 3-Bolt Flange Header Reducers
    • 3" Diameter Collector
    • 3" OD Outlet

    • 2 Per Package
    • Includes Flanges; Gaskets; And Hardware

      Smooth Transition Exhaust Components

      Hedman Headers offers reducers and collectors to provide a smooth transition from the header to the rest of the exhaust system for maximum power production. Use these reducers and collectors on any set of custom-built race headers, or street headers.

    Part TypeHeader Reducer
    Product LineHedman Header Reducers and Collectors
    BrandHEDMAN
    Package Height4.2
    Package Width4.5
    Package Length7.0
    Weight2.75 PG
    Part CategoryPerformance Parts
    Oxygen Sensor Bung IncludedNo
    QuantitySold as a pair
    Bolts/Studs IncludedYes
    Reducer FinishNatural
    MountingBolt
    Gaskets IncludedYes
    Reducer MaterialSteel
    Collector Attachment3-bolt flange
    Reducer Outlet Diameter3 in (76.2 mm)
    Collector Diameter3 in (76.2 mm)
    Gasket MaterialComposite
    Part FitmentSemi Universal
    Vendor Part Number21118
    Package Qty1
    Package TypeEA
    No Questions
    No Reviews

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    Some parts are not legal for use in California or other states with similar laws / regulations
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