BD Diesel 1045947-T4 Wastegated Exhaust Pulse Manifold T4 Mount 40-Degree

The BD Diesel 1045947-T4 is a performance wastegated exhaust pulse manifold engineered for Dodge 5.9L Cummins diesel applications running a high-flow T4 or T6 turbocharger. The cast and machined wastegate port completely divides the manifold into two sections, preserving true divided pulse manifold flow for optimized turbo response and lower exhaust gas temperatures (EGTs).

Internal geometry is engineered using Computational Fluid Dynamics (CFD) modeling to maximize exhaust flow across the entire RPM band. Thick-wall, high-silicon ductile iron construction retains heat energy while resisting cracking under extreme thermal cycling. Precision slip joints allow the manifold to expand and contract with heat, significantly reducing cyclic thermal fatigue and extending long-term durability. Pre-drilled and tapped 1/8-NPT ports are ready for pyrometer probes and pressure gauge installations.

The wastegate port is machined for use with a 45mm Hyper Gate or TurboSmart external wastegate. A block-off plate and clamp are included. The gate port area measures 1.67 sq. in. (33%) of total flow area. High-temperature POR-15 paint protects the exterior finish.

Key Features:

• Fully divided pulse manifold design retains exhaust pulse energy for quicker turbo spool
• CFD-optimized internal geometry increases flow throughout the RPM band
• Thick-wall high-silicon ductile iron casting for extreme durability
• Precision slip joints reduce cyclic thermal fatigue and prevent cracking
• Machined wastegate port compatible with 45mm Hyper Gate or TurboSmart wastegates
• Gate port area: 1.67 sq. in. (33%)
• Pre-drilled 1/8-NPT ports for pyrometer probes and pressure gauges
• High-temperature POR-15 exterior paint
• Block-off plate and clamp included
• Better cylinder exhaust evacuation to keep EGTs down
• Gasket, bolt, and spacer kits available separately

Install Time: Approximately 2 hours 30 minutes

Warranty: 36 months / 75,000 miles

Note: Not for sale on licensed California vehicles.