This “you weld it” DIY Cummins High Flow Air Intake Horn is available in two intake sizes 2.5″ and 3″. It is also available with your choice of mandrel bends, 90 or 180-degree tubing. This kit is what you need to build a custom air intake for your 4bt, 6bt Cummins. The air horn base is CNC laser cut out of 3/8″ mild steel so it can be easily MIG welded. The Mandrel bends are 16ga aluminized steel to prevent corrosion.
*Cutting, grinding, and welding is required to make this kit fit your application. We also recommend a tubing bead roller.
The 2.5″ 90-degree kit can be seen in this video: