Description
Stainless Diesel's 2ND Gen exhaust manifolds are designed to provide a significant improvement in airflow to improve overall performance with faster turbo spooling and reduced EGT's.
IMPORTANT NOTES
These exhaust manifolds are a direct fit for the 1998.5-2002 5.9 Cummins and are compatible with all factory and drop in style turbochargers. They will also fit the 2003-2025 common rail engines when paired with most aftermarket 2nd gen swaps and compound kits.
The T6 competition manifold features a 0 degree turbo flange that will likely require minor tweaks/modifications to traditional downpipes/intercooler pipes.
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Advanced Shell-Molded Casting: Smooth interior and exterior surfaces ensure superior exhaust flow compared to older, rough “60 grit sandpaper” style castings commonly found elsewhere.
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Bolt-On CNC-Ported Center Section: ¾” thick center section allows for custom porting to meet your exact specifications.
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Dual Drilled & Tapped Ports: Ready for EGT and Drive sensors to keep precise track of engine conditions.
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Thick-Wall Construction: Retains heat effectively to improve turbo spool and overall efficiency.
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Generous 1.650" Runner Diameter: Full-length runners maintain high flow rates right to the center outlet.
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Improved Turbo Driveability: Enhances responsiveness and reduces spool time by several hundred RPMs on large turbo setups.
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Increases Power & Expands Powerband: Provides noticeable horsepower gains and a wider, more usable torque curve.
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Better Fuel Economy: Optimizes efficiency when combined with complementary modifications.
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Excellent Fit & Finish: Designed for a precise fit with robust construction and smooth runners featuring extra porting room.
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Superior Flow Compared to Competitors: Engineered to outperform other exhaust manifolds on the market.