2015 Product
BD 2015-2016 Fall Catalog

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5.9L Exhaust Manifolds
1045987 - 2-piece Exhaust Manifold - Dodge 2003-2007
1045987 - 2-piece Exhaust Manifold - Dodge 2003-2007
Gaskets 1988-1998 12-valve
Gaskets 1998-2007 24-valve 5.9L

Great as a stock replacement, our exhaust manifolds were designed with expansion joints and heavy webbing to prevent cracking. The exhaust runner design maintains exhaust velocity to drive the turbine wheel. Runner size does not go beyond the size of the exhaust ports on the head because when the runners are larger, the velocity to drive the turbo is lost due to the expansion and temperature in the exhaust manifold reduces the turbine drive pressure needed for turbocharger response.
On engines with enhanced fuel flow and larger turbochargers, the principal remains the same. Velocity and temperatures are needed to drive the turbine wheel which turns the larger compressor wheel that supplies the extra volume to attain proper air-to-fuel ratios.
BD’s 1-Piece Stainless Exhaust Manifolds do not require the expansion joints because of the ability of the Stainless Steel to withstand higher heat without cracking.

Product Warranty 36-Month Part
  • Available Makes
  • Dodge
  • Available Engines
  • 2003 - 2007 5.9L CR
  • 1998 - 2002 5.9L 24-Valve
  • 1988 - 1998 5.9L 12-Valve
  • Available Transmissions
  • Automatic
  • Manual
Product Rating
CloseOnline Reviews:
  • Jul 27, 2014
    Installation: 5
    Peformance: 5

    Bought the BD three piece manifold to replace the stock Cummins. Installed it without having to pull the turbo out, easy install if you have the right tools. Noticeable gain in engine performance...Great upgrade

    Reviewed By: DieselTech88
  • Feb 11, 2008
    Installation: 4
    Peformance: 4

    Part# 1045986 - only complaint is that it did not include new manifold bolts, the others do. Install was fine. Looks good and turbo spools a little faster. All in all a good product.

    Reviewed By: chris

Exhaust Manifold Kits (gaskets sold seperately, see below):
1045980      Manifold, Exhaust Pulse - 1988-1998 Dodge 12-valve
1045985*     Manifold, Exhaust Pulse - 1998-2002 Dodge 24-valve
1045987**    Manifold, 2-piece Exhaust Pulse - 2003-2007 Dodge 5.9L
                        and Common Rail 5.9L Motor Homes

Exhaust Manifold Gasket Sets:
1045981     Gasket Set, Exhaust Manifold - 1988-1998 Dodge 12-valve
1045986     Gasket Set, Exhaust Manifold - 1998-2007 Dodge 5.9L

* 1045985 can be used as a direct replacement for Cummins part number 3946036 used on pick-up engines.
**1045987 can be used as a direct replacement for Cummins part numbers 3967995, 3943871 & 3943875 used on pick-up, motor homes, industrial and commercial engines.