Watch in action

High-Flow 4in Downpipe for 12V Cummins

Unlock the true potential of your 1989-1993 Dodge 2500/3500 2WD with the Diamond Eye 4in Turbo Back Downpipe. Engineered specifically for trucks equipped with an HX40 turbo flange, this downpipe replaces restrictive factory piping to significantly reduce EGTs and improve turbo spool-up. Crafted from high-quality aluminized steel using precision CNC mandrel bending, this component ensures maximum exhaust velocity and a perfect fit for your 2WD drivetrain.

Key Features and Benefits:

• Optimized Flow: 4-inch diameter design minimizes backpressure for increased horsepower.
• HX40 Compatibility: Precision-engineered flange ensures a leak-free, direct-fit connection.
• Durable Construction: Heavy-duty aluminized steel provides excellent corrosion resistance and longevity.
• Perfect Fitment: Specifically designed for 2WD 5.9L Cummins applications, ensuring clearance and easy installation.

Whether you are towing heavy loads or looking for a performance boost, this downpipe is an essential upgrade for your classic Cummins diesel. By smoothing out the exhaust path immediately after the turbo, you allow your engine to breathe more efficiently, resulting in a more responsive and reliable truck. Experience the engineering excellence of Diamond Eye Performance, brought to you by GGCRACING.