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Wehrli Custom Fabrication Cummins 4" High Mount S400 Down Pipe - WCF100262Wehrli 4" High Mount S400 Downpipe for Cummins WCF100262 Precision Fit for High Mount S400 Setups on 2nd Gen Style Manifolds Take your Cummins build to the next level with the WCFab 4 Turbo Downpipe, engineered specifically for high mount S400 turbos paired with a 2nd Gen style exhaust manifold. Whether you're chasing power or refining your custom twin setup, this pipe delivers the fit, flow, and durability serious builds demand. Key Features: 4"
Precision Fit for High Mount S400 Setups on 2nd Gen Style Manifolds
Take your Cummins build to the next level with the WCFab 4” Turbo Downpipe, engineered specifically for high mount S400 turbos paired with a 2nd Gen style exhaust manifold. Whether you're chasing power or refining your custom twin setup, this pipe delivers the fit, flow, and durability serious builds demand.
🛠️ 4" Turbo Down Pipe for Cummins
Specifically built for High Mount S400 turbos on 2nd Gen style exhaust manifolds.
📏 Upper Flange – 4.6” Diameter
Perfectly matches the S400 T6 exhaust housing, ensuring a leak-free connection under load.
🔩 Factory-Style Lower Flange
Connects to your OEM v-band flange using your factory v-band clamp — no cutting or welding needed.
🔥 High-Temp Ceramic Coated
Ready to handle extreme EGTs while keeping under-hood temps in check and improving longevity.
🧯 Includes Heat Wrap + Hose Clamps
Reduce heat soak and protect surrounding components — wrapped and clamped for a clean finish.
🔧 Includes 4” V-Band Clamp for Turbo Connection
Everything you need to bolt it up and let it eat.
📦 Compatible with 2003–2004 Cummins
Fits early 5.9L trucks that have upgraded their front pipe to the 2004.5–2007 style part.
Part #: WCF100262
Fits: High Mount S400 on Cummins w/ 2nd Gen manifold
Finish: High-temp ceramic coated
Clamp: 4" V-band included
Install Time: ~1 hour with standard tools
💯 100% Authentic | 🔥 Track-Proven Quality | 🛠️ Diesel Fabrication Ready