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Flowtech Exhaust

Flowtech Long Tube Header - Black Paint

Part # 11150FLT Be the first to write a review

1968-1974 Oldsmobile Cutlass (not Supreme)/442 350-403ci Standard Headers Primary Tube Collector Size 1.75 in. x 3 in.

Flowtech Long Tube Header - Black Paint

In Stock
Free Shipping - Lower 48 US States
$319.95
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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 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.

Features:

  • 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 flash mild steel tubing
  • Precision engineered for fit, performance and economy

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
Catalytic Converter Quantity0
CategoryExhaust
Collector Attachment3-Bolt Flange
Collector Diameter3.00 IN
Collector Port Diameter3.00 IN
Collector Reducer IncludedYes
Collector Reducer Outlet Diameter2.50 IN
ColorBlack
DesignLong Tube
Drive2WD
EGT PortNo
Emission Code4
EngineOldsmobile V8
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 ShapeRectangle
Primary Tubing Diameter1 3/4 IN
1.75 IN
Product TypeHeaders
QuantitySold as a Pair
Sheen LevelSatin
Sub CategoryExhaust Manifolds
Tube Wall Thickness18 GU
UPC787480111500
Part Number11150FLT
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 - 11150-3901fltrev1.pdf
Recommended replacement gasket - Mr. Gasket part# 453 Must modify exhaust system to retain catalytic converters.
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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 Long Tube Header - Black Paint
    Flowtech Long Tube Header - Black Paint
    $319.95