

BUNDLE * CNC T6 S400 / K31 Exhaust Outlet Flange to 4in Pipe w/ Clamp
🛠️ S400 / K31 Exhaust Outlet Flange & Clamp Kit – CNC Steel | T6 5" Outlet to 4" Pipe
This CNC-Machined Exhaust Outlet Flange Kit is designed to fit Borg Warner S400 turbochargers with T6 exhaust housings and K31 turbochargers. Engineered for a smooth transition from the large 5.00" turbine outlet to standard 4.00" exhaust tubing, this flange simplifies custom downpipe fabrication while ensuring a strong, leak-free seal.
Crafted from high-strength steel, the flange resists warping under high exhaust temperatures and is precision-machined for a tight, reliable fit. The included heavy-duty v-band clamp keeps everything secure under pressure and vibration—perfect for high-boost diesel, race, or heavy-duty applications.
🚀 Key Features & Benefits:
✅ Fits Borg Warner S400 (T6 Exhaust Housing) & K31 Turbos
✅ Adapts 5.00" Turbine Outlet to 4.00" Exhaust Pipe
✅ CNC-Machined Steel Flange – Durable and weld-ready
✅ Includes High-Strength V-Band Clamp – Boost-tight and reliable
✅ Perfect for Custom Downpipes, Turbo Kits & Competition Builds
✅ Resists Warping Under High Heat & Pressure
📦 What’s Included:
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(1) CNC Steel Exhaust Outlet Flange (5" to 4")
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(1) V-Band Clamp
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🔥 Connect your big turbo to your exhaust the right way. No leaks. No warping. Just flow. Order your S400/K31 flange & clamp kit today.
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BUNDLE * CNC T6 S400 / K31 Exhaust Outlet Flange to 4in Pipe w/ Clamp
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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.