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Flowtech Exhaust

Flowtech Afterburner Headers - Painted

Part # 49150FLT Be the first to write a review

1973-1974 Chevy/GMC Pick-Up 1/2, 3/4, 1-Ton, 2WD, 1973-1974 Blazer/Jimmy/Suburban 2WD: 283-400, Tube Size 1.625", Collector Size 3"

Flowtech Afterburner Headers - Painted

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Advertised Price $419.95
$299.95
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4

Emissions

This part is legal for sale or use on Racing Use Only Vehicles

The following vehicles are considered Racing Use Only Vehicles:

  • Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street.

    See Emissions Details
FLOWTECH's Afterburner Turbo Chamber Headers represent the first new major design change in exhaust technology in decades. This designs combines the race-proven 4 into 1 design with the torque managing capabilities of a Tri-Y header. The turbo chamber helps smooth out exhaust turbulence for increased performance and a broad power curve.

Features:

  • Horsepower and Torque increased over conventional header design
  • Big 3” secondary collector for reduced back pressure
  • Tuned-length primary tubes combine with Velocity Tube to smooth out exhaust pulses
  • Patented Velocity Tube increases cylinder scavenging
  • All hardware and premium gaskets included for a complete installation

About Flowtech Exhaust

Flowtech provides high-quality performance exhaust systems at a great value. Explore our lineup of headers, mufflers, and exhaust systems at our official retailer, Holley.com!​

Air Injection TubesNo
Bolt Size3/8-16 x 3/4 IN
Bolts IncludedYes
Brand Flowtech Exhaust
California Proposition 65Yes
CARB (California) CompliantNo
CategoryExhaust
Collector Attachment3-Bolt Flange
Collector Diameter3.00 IN
Collector Port Diameter3.00 IN
Collector Reducer IncludedYes
Collector Reducer Outlet Diameter2.50 IN
ColorBlack
DesignAfterburner
Drive2WD
EGT PortNo
Emission Code4
EngineChevrolet Small Block Gen I
FinishPainted
Flange Thickness0.3125 IN
5/16 IN
Gasket Or Seal IncludedYes
Grade TypePerformance
Header SeriesFlowtech I
Header StyleLong Tube
MaterialMild Steel
Mounting Hardware IncludedYes
Oxygen Sensor PortNo
Part TypeExhaust Header
Port ShapeOval
Primary Tubing Diameter1 5/8 IN
1.625 IN
Product TypeHeaders
QuantitySold as a Pair
Sheen LevelSatin
Tube Wall Thickness16 GU
UPC787480491503
Part Number49150FLT
4

This part is legal for sale or use on Racing Use Only Vehicles

The following vehicles are considered Racing Use Only Vehicles:

  • Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street.

WARNING: It is against the law to install this part on an Emissions Controlled Vehicle

Instructions - 49150-3901fltrev.pdf
Do not fit angle plug heads. Breaking in an engine with ceramic coated headers WILL result in damage to the coating and will VOID all warranties. Ceramic coated headers require several heat cycles to fully cure before they will withstand extreme heat. Flowtech recommends using cast iron exhaust manifolds or old headers to break in new engines to avoid coating damage. Please call Flowtech tech service at 270-781-9741 for additional information regarding ceramic coated exhaust products. The use of header wraps can cause the header tubes to crack or rust due to excessive heat and moisture build-up. Flowtech does not recommend the use of header wraps as this will void the warranty.
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    *Free Shipping and Handling only offered to the contiguous US on orders over $149, excludes clearance parts and oversized packages.

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

    Flowtech Afterburner Headers - Painted
    Flowtech Afterburner Headers - Painted
    Advertised Price $419.95
    $299.95
    Save $120.00