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Flowmaster

Flowmaster Manifold Downpipe Kit

Fits 1967-1972 GM C10 2wd trucks with SBC engine.

Part # 81072 Be the first to write a review

Flowmaster Manifold Downpipe Kit

Estimated Ship Date: 05/14/2025
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3

Emissions

This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles.

See Emissions Details

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Flowmaster introduces their manifold downpipes for 1967-1972 GM C10/C15 1/2 ton 2WD pickups with small block V8 engines. These 2.50-inch mandrel bent 409S stainless steel downpipes fit only the factory Angled GM Ram Horn style manifolds and include 3 bolt flanges, donut gaskets and donut sleeves. These downpipes are covered by Flowmaster's Lifetime Limited Warranty and can be used with systems part number 17654 or part number 817654 for a complete engine back exhaust installation.

Features:

  • To Adapt Exhaust to Factory Rams Horns Manifolds
  • Mandrel-bent 16 Gauge Stainless Steel Tubing
  • Includes all Necessary Hardware
  • For SBC Engine Applications
  • Lifetime Limited Warranty
  • Flowmaster Quality
2WD/4WD2WD
Bend TypeMandrel
Brand Flowmaster
CategoryExhaust
Clamping TypeRound Band
Clamps IncludedNo
ColorSilver
Emission Code3
FinishNatural
Flanged InletYes
Flanged OutletNo
Gasket Or Seal IncludedYes
Grade TypePerformance
Hanger IncludedNo
Heat ShieldNo
Inlet Attachment TypeBolt-On
Inlet Diameter2.00 IN
Inlet Inside Diameter2.37
Inlet Outside Diameter2.50
Main Piping Diameter2.50 IN
MaterialStainless Steel
Mounting Bracket IncludedNo
Outlet Attachment TypeClamp-On
Weld-On
Outlet Diameter2.50 IN
Outlet Inside Diameter2.37
Outlet Outside Diameter2.50
Pipe Diameter2.50
Product TypeExhaust Accessories
Quantity1 Pair
ShapeDownpipe
Single DualDual
System TypeManifold Downpipes
Tubing Diameter2.50 IN
UPC700042029884
California Proposition 65 Chemical NameChromium (hexavalent compounds)
Nickel (Metallic)
California Proposition 65 RequiredYes
Part Number81072
3

This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles.


The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:

  • 1965 and older U.S. manufactured California Certified vehicles
  • 1967 and older U.S. manufactured Federally Certified vehicles
  • 1967 and older Foreign manufactured vehicle


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


The following vehicles are considered Emissions Controlled Vehicles:

  • 1966 and newer U.S. manufactured California Certified vehicles
  • 1968 and newer U.S. manufactured Federally Certified vehicles
  • 1968 and newer Foreign manufactured vehicle
Instructions - fm_warranty_general.pdf
Fits 1967-1972 GMC/Chevrolet C10 and C15 1/2 Ton 2 wheel drive pickup with SBC engine. Includes flanges and gaskets. Fits only with factory GM Angled Ram Horn manifolds

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