Product Summary

400, 403, 425, 455, Full-length Header Tube Type, Steel

    Key Specs

    Header Tube TypeFull-length
    Flange StyleStandard
    Primary Tube Diameter1-3/4"
    Material TypeSteel

    Need To Know

    This Product Will Ship Free

    Shipping Policies & FAQs

    Quick and Easy Returns

    Return Policy


    Flowtech headers are the perfect combination of performance and value. Flowtech long tube headers are precision engineered using mandrel bent tubing, formed collectors and 5/16" flanges with sealing rings for a leak-free seal. All mounting hardware and gaskets are included for a simple installation. This header is coated in a high heat resistant black paint for a stealthy appearance.

    • Fuel Economy From The Engine
    • Leak Test For Max Performance
    • Mandrel-Formed Power Plenum
    • Leakproof O-Ringed Port Seals
    • Include All Mounting Hardware
    • Constructed of .049 cold roll flah mild steel tubing
    • Precision engineered for fit, performance and economy


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    CARB Warning

    For race/ off road use only

    Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.


    MFG. Part #11154FLT
    BrandFlowtech Exhaust
    Header Tube TypeFull-length
    Flange StyleStandard
    Primary Tube Diameter1-3/4"
    Material TypeSteel
    Exhaust Port ShapeRound
    Collector Diameter3 Inch
    Hardware IncludedYes
    Gasket(s) IncludedYes
    Sold in QuantityPair
    Emission Code3
    GTIN Code787480111548