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Flowmaster

Flowmaster Manifold Downpipe Kit

Part # 81068 Be the first to write a review

Fits 1964-74 GM A/F-Body with SBC engine.

Flowmaster Manifold Downpipe Kit

Estimated Ship Date: 06/26/2026
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Emissions

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

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Flowmaster's manifold downpipe kits are designed for the person who wants to use a crossmember-back exhaust system while using the factory exhaust manifolds. Utilizing mandrel bent 409S stainless steel tubing and high quality flange gaskets, Flowmaster's manifold downpipe kits are designed for the perfect leak free fit.

Features:

  • Fits Chevrolet Small Block Engines in GM A-Body and F-Bodies
  • Mandrel-bent 16 Gauge Stainless Steel Tubing
  • Designed to be Used Without Heat Riser
  • To Adapt Exhaust to Factory Manifolds
  • Large 2.50-inch Manifold Downpipes
  • Flowmaster Quality
Bend TypeMandrel
Brand Flowmaster
CategoryExhaust
Clamping TypeFlat Band
Clamps IncludedNo
ColorSilver
Emission Code3
FinishNatural
Flanged InletYes
Flanged OutletNo
Gasket Or Seal IncludedYes
Grade TypePerformance
Hanger IncludedNo
Inlet Attachment TypeBolt-On
Inlet Inside Diameter2.37 IN
Inlet Outside Diameter2.50 IN
Main Piping Diameter2.50 IN
MaterialStainless Steel
Material Gauge16
Mounting Bracket IncludedNo
Outlet Attachment TypeClamp-On
Weld-On
Outlet Inside Diameter2.37 IN
Outlet Outside Diameter2.50 IN
Pipe Diameter2.50 IN
Product TypeExhaust Accessories
Quantity1 Pair
ShapeDownpipe
Single DualDual
System TypeDownpipe Kit
Tubing Diameter2.50 IN
Type of ComponentExhaust Adapter Pipes
UPC700042025749
California Proposition 65 Chemical NameChromium (hexavalent compounds)
Nickel (Metallic)
California Proposition 65 RequiredYes
Part Number81068
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 - 81068_instructions.pdf
Instructions - Flowmaster Warranty 26 Update.pdf
Fits 1964-1974 Chevrolet Chevelle & 1967-1974 Chevrolet Camaro with a SBC engine using the factory stock Chevrolet 3-bolt manifolds. Will Not work with heat riser. Does not fit: "Ram Horn" style manifolds, or 1962-1967 Nova or X-frame Impalas.

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