🛠️ HX40 4.00" Turbo Outlet Flange – Mild Steel Weld Flange for 2nd Gen S300 Downpipes

This HX40 4.00" Flange is designed for 2nd Gen Dodge Cummins trucks running S300 turbos with an HX40-style outlet. CNC-cut from mild steel, this weld-on flange provides a durable, high-flow connection point for custom 4" downpipe fabrication.

With a 4.00" outer diameter, it’s perfect for welding directly to 4" exhaust tubing, while also allowing 3.50" pipe to slip inside the bore for cleaner, more versatile fabrication.

🚀 Key Features & Benefits:
✅ Fits HX40-Style Outlets on 2nd Gen S300 Turbos
✅ 4.00" OD – Matches standard 4" exhaust pipe
✅ 3.50" Tubing Fits Inside – Ideal for slip-fit or stepped builds
✅ Mild Steel Construction – Weld-ready and cost-effective
✅ Great for Custom Downpipes, Race Rigs, and Street Builds
✅ Designed for High-Temp, High-Boost Diesel Applications

📦 What’s Included:

• (1) HX40 4.00" Mild Steel Weld Flange

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🔥 Build your downpipe right from the turbo out. Durable, weldable, and ready for boost—order your HX40 flange today.