DHD 300-120 DURAMAX HIGH FLOW MANIFOLD & UP PIPE BUNDLE 2001-2004 LB7

*NOT LEGAL FOR SALE OR USE IN CALIFORNIA. THE MANUFACTURE, SALE, OFFER FOR SALE, OR INSTALLATION OF THIS PRODUCT MAY ALSO BE ILLEGAL NATIONWIDE UNDER THE FEDERAL CLEAN AIR ACT (42 U.S.C. § 7522(A)(3))*

*This product is ONLY designed for closed course racing where it is legal to do so. Any other use will be in violation of local, state, and federal laws. We are not responsible for unlawful use of this product.*

DHD's high flow manifold bundle increases exhaust air flow over 55% without any port modifications. Additional gains can be found in port matching and port blending. Our manifolds are cast from the same high Silca Iron that's become standard in the high flow manifold market. Included in the high flow bundle are our .120" wall thickness 304 stainless steel up pipes, featuring sleeved bellows and double welded pipe/flange connections.

Our manifolds swept back tapered inner diameter port design will accelerate exhaust gases to the turbine, lowering EGTS and making it easier for the turbo to spool quickly. 

Features / Benefits:

• Reduced Back pressure
• Improve Fuel Economy
• Lower EGT's and drive pressure
• Quicker turbo spool up
• 1/8NPT Bungs in each manifold for EGT or Drive Pressure Sensor

Bundle Includes:

• Right and Left Cast Manifolds
• Right and Left .120" Wall Stainless Up Pipes
• 16 4340 Chromoly M10 12pt Manifold Bolts (Not cheap socket cap screws)
• 2x 1/8NPT Port Plugs
• MLS Stainless Up Pipe Gasket Set (4 gaskets)
• MLS Stainless Manifold Gasket set (2 gaskets)
• 12 12.9 M10 12pt Up Pipe Bolts

Notes:

• The passenger side up pipe is D shaped to allow for use with most aftermarket downpipes. However, slight modifications may need to be made to get the best fit depending on downpipe brand.
• There is no EGR riser on the passenger side up-pipe. This kit is not a direct replacement for trucks equipped with EGR and should only be installed on pre-emission equipped trucks.