Key Specs

D-115-28
MFG. Part #91674FLT
BrandFlowtech Exhaust
CARB EO#
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Flowtech Exhaust 91674FLT Details

Flowtech headers are the perfect combination of performance and value. Flowtech shorty headers are precision engineered using mandrel bent tubing, formed collectors and 3/8" flanges for a leak-free seal. Header gaskets are included for a simple installation. This header is coated in a high heat resistant black paint for a stealthy appearance. CARB EO# D-115-28.

Features:

  • Shorty design headers for popular 2011-2017 F-150 5.0L V8 “Coyote” equipped engine.
  • Mandrel-bent tubes provide consistent tubing diameters for smooth flow and increased exhaust velocity
  • Heavy duty 16-gauge tubing for increased strength and durability
  • Smooth transition, 1.625” diameter primary tubes are used for increased exhaust flow increasing performance and improving throttle response
  • Machined 3/8” header flanges for a leak-free seal and maximum strength
  • Premium aluminum header gaskets included
  • Rebates

    Holley October Promo 10% Off Select Parts Sale

    Holley October Promo 10% Off Select Parts SaleHolleyOctoberPromo10%OffSelectPartsSale

    Holley's October Promo 10% Off Select Parts Sale, running from September 28, 2026, through November 1, 2026. For a limited time, customers can save up to 10% off on select Holley parts, making it the perfect opportunity to upgrade your ride with premium Holley branded parts including Holley, Brawler, Quick Fuel, Leg Wheels, Rev Wheels, Rocket Racing, Flowtech, Edge, Racequip, Apr and Dinan. Purchases must be made between September 28, 2026, through November 1, 2026. This limited-time offer applies to qualifying Holley branded parts purchased during the promotional period. Following the promotion, these parts will revert back to standard pricing.

    Flowtech Exhaust 91674FLT Specifications

    D-115-28
    KEY SPECS
    MFG. Part #91674FLT
    BrandFlowtech Exhaust
    CARB EO#
    GENERAL
    GTIN Code090127720998

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