DIESELR Cast Iron High Flow Exhaust Manifold (2003-2007 Cummins 5.9L)
DIESELR Cast Iron High Flow Exhaust Manifold (2003-2007 Cummins 5.9L) is backordered and will ship as soon as it is back in stock.
Shipping & delivery
Usually ships in 2–3 business days unless a different lead time is shown on this page. Shipping cost is calculated at checkout (UPS or USPS to the contiguous U.S.).
Shipping policy · Returns · Fitment questions? (561) 207-7988
Delivery and Shipping
Delivery and Shipping
Standard order processing is 2–3 business days unless this product or your order confirmation states a different lead time. Custom-built, made-to-order, backorder, and pre-order items follow their stated lead times.
Enclosures and subwoofer boxes ship for $50 per unit. Other shipping charges are calculated at checkout. Orders outside the contiguous 48 United States may require additional shipping; we will contact you for approval before shipment.
Subwoofer boxes ship UPS Ground where available. Read our Shipping Policy and Return and Refund Policy for delivery, product-specific return windows, and warranty details.
DIESELR Cast Iron High Flow Exhaust Manifold (2003-2007 Cummins 5.9L)
DIESELR Cast Iron High Flow Exhaust Manifold (2003-2007 Cummins 5.9L) is backordered and will ship as soon as it is back in stock.
Description
Description
Built to Perform:
Engineered to outperform the stock manifold, this heavy-duty upgrade boosts exhaust flow by up to 20% over factory. Matched ports and a merged runner design reduce backpressure for noticeable gains in performance and throttle response.
Durability You Can Count On:
Cast with 0.25" thick walls—a serious step up from the OEM’s 0.15"—to eliminate warping and cracking under extreme heat. The reinforced T3 flange adds strength where it matters most.
Bolt-On Power:
Designed as a direct replacement for a seamless install. Expect quicker turbo spool-up, lower EGTs, and improved overall drivability.
Fitment:
Fits 2003-2007 Dodge Ram with 5.9L Cummins Turbo Diesel engines.
What’s Included:
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(1) Heavy Duty Cast Iron High Flow Exhaust Manifold
Overview:
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Up to 20% More Exhaust Flow
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Thicker Wall Casting (0.25")
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Reduced Backpressure
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Faster Turbo Response
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Lower EGTs
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Reinforced T3 Flange
Fitment & installation
Fitment & installation
Check the selected part against your vehicle. Need help? Call (561) 207-7988.
Selected part: 355-04600
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Read FOX’s application notes for part 987-24-001 (rear shock)
Payment & Security
Payment methods
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