HE351 Flange
🛠️ 3rd Gen HE351 Turbo Downpipe Flange – Mild Steel | Fits S300 Turbo (4.375" OD)
This HE351 Flange is a mild steel weld-on flange designed specifically for use on 3rd Gen Dodge Ram trucks equipped with S300 turbos. With a 4 3/8" outer diameter, it’s built to match the unique outlet of HE351-style housings commonly found in performance diesel setups.
Perfect for custom downpipe fabrication, the flange accepts 3.50" exhaust tubing inside the bore or can be welded externally to 4.00" tubing. Whether you're upgrading your turbo or replacing a worn-out flange, this component provides a solid, boost-tight fit for any high-performance exhaust build.
🚀 Key Features & Benefits:
✅ Fits 3rd Gen Dodge Ram HE351/S300 Turbo Outlets
✅ 4.375" Outer Diameter – Matches OEM-style flange profile
✅ Weld-On Mild Steel – Ideal for custom fabrication
✅ Works with 4.00" Downpipes or 3.50" Pipe (Slip-Fit Inside Flange)
✅ Built for High-Boost, High-Temp Diesel Exhaust Systems
✅ Perfect for Race, Tow, or Street Performance Builds
📦 What’s Included:
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(1) Mild Steel HE351/S300 Turbo Outlet Flange – 4.375" OD
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🔥 Custom exhaust? Start with the right flange. Weld it once. Seal it for good. Order your HE351 downpipe flange today.
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HE351 Flange
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FAQs
Please read our FAQs page to find out more.
Are OEM products more expensive than aftermarket alternatives?
OEM products might have a higher upfront cost compared to aftermarket parts, but their superior quality and durability often make them a more cost-effective choice over time. Investing in OEM ensures you’re getting parts specifically designed for your vehicle, which can lead to better performance and longevity.
Can I purchase OEM parts online or do I need to visit a dealership?
You don’t need to visit a dealership to get OEM parts. You can conveniently purchase genuine OEM components from authorized distributors and reputable online retailers like Turbo Tech Performance. Our online store provides a wide selection of high-quality parts delivered straight to your door.
Are parts from brands like Mopar, ACDelco, and Motorcraft interchangeable between different vehicle brands?
No, parts from Mopar, ACDelco, and Motorcraft are typically designed for specific vehicle brands. It’s crucial to ensure compatibility with your vehicle’s make and model by checking part numbers and consulting with a knowledgeable expert.
Can I install OEM parts myself, or is it better to have a professional handle it?
While some OEM parts can be installed by DIY enthusiasts, the complexity of installation can vary. For the best results and to ensure proper fitment and performance, we recommend having a trained mechanic install the parts, especially if you’re unfamiliar with automotive repairs.
Do OEM parts come with a warranty?
Yes, many OEM auto parts come with a manufacturer’s warranty that covers defects or issues. Be sure to check the warranty details for each part at the time of purchase, and keep your receipt for any potential warranty claims.