-3%
Click to zoom in
SKU: WCF205-190
Wehrli 2017-2019 L5P Duramax Intercooler Outlet Boot Adapter
This billet aluminum beadroll adapter flange installs on the outlet (passenger cold side) of the stock intercooler on 2017-2019 Chevy Silverado and GMC Sierra 2500/3500 HD trucks with L5P Duramax engines. It converts the factory slip/clip ring to a machined bead roll joint for secure connection of 3.5-inch silicone boots with T-bolt clamps. Perfect for aftermarket turbo kits and custom high-flow intercooler piping setups that demand reliable airtight seals and boosted performance.
Key Features
- Billet Aluminum Construction: Machined from solid aluminum for strength and resistance to boost pressure without cracking or leaking.
- Precision Bead Roll Flange: Exact fit to stock intercooler outlet ensures seamless transition to 3.5-inch piping for unrestricted airflow.
- OE Adapter Design: Directly replaces factory slip joint allowing easy upgrade to silicone boots and T-bolt clamps on custom builds.
- High-Flow Compatible: Supports aftermarket intercooler pipes and turbo kits by providing a robust bead roll connection point.
- Passenger Side Specific: Targets cold side outlet for optimal cooling efficiency in L5P Duramax applications.
Product Notes
- Intended for custom fabricated high-flow intercooler piping and turbo kits adapting stock intercooler to 3.5-inch silicone boots.
- Requires separate 3.5-inch silicone boot and T-bolt clamp for complete assembly.
- Ships securely wrapped to prevent damage during transit.
Installation Notes
- Professional installation recommended.
- Remove OE slip/clip assembly from intercooler outlet and bolt on adapter flange using factory hardware.
- Compatible with stock intercooler mounting points no modifications needed.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2017-2019 | Chevrolet | Silverado 2500 HD | High Country |
| 2017-2019 | Chevrolet | Silverado 2500 HD | LT |
| 2017-2019 | Chevrolet | Silverado 2500 HD | LTZ |
| 2017-2019 | Chevrolet | Silverado 2500 HD | WT |
| 2017-2019 | Chevrolet | Silverado 3500 HD | High Country |
| 2017-2019 | Chevrolet | Silverado 3500 HD | LT |
| 2017-2019 | Chevrolet | Silverado 3500 HD | LTZ |
| 2017-2019 | Chevrolet | Silverado 3500 HD | WT |
| 2017-2019 | GMC | Sierra 2500 HD | Base |
| 2017-2019 | GMC | Sierra 2500 HD | Denali |
| 2017-2019 | GMC | Sierra 2500 HD | SLE |
| 2017-2019 | GMC | Sierra 2500 HD | SLT |
| 2017-2019 | GMC | Sierra 3500 HD | Base |
| 2017-2019 | GMC | Sierra 3500 HD | Denali |
| 2017-2019 | GMC | Sierra 3500 HD | SLE |
| 2017-2019 | GMC | Sierra 3500 HD | SLT |
Why Choose Wehrli Custom Fabrication?
- Specializes in L5P Duramax performance components with proven track record in diesel upgrades.
- CNC machined parts deliver consistent quality and exact tolerances for leak-free performance.
- Engineered in the USA for durability under high boost and extreme towing conditions.
Frequently Asked Questions
- Q: Will this fit my 2017-2019 L5P Duramax Silverado or Sierra?
- A: Yes it bolts directly to the stock intercooler outlet on all listed 2500 HD and 3500 HD models with 6.6L L5P engine.
- Q: What material is the adapter made from?
- A: Billet aluminum machined to precise specifications for strength and heat resistance.
- Q: What is included and do I need additional parts?
- A: Adapter flange only. Pair with 3.5-inch silicone boot and T-bolt clamp sold separately. Uses factory hardware.
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock - ships same or next business day
- Packaging: Foam protected in 5 x 5 x 3 inch box
- Weight: 0.4 lbs
Clamps
Exhaust clamps, hose clamps, and line clamps are the small hardware that keeps performance systems sealed and rattle-free. Whether you are finishing an exhaust build, routing coolant lines, or securing boost piping on a turbocharged engine, the right clamp makes the difference between a clean install and a leak.Popular UpgradesBand clamps and slip-fit exhaust clamps are the most popular choice for performance exhaust work, providing a tight seal without crushing the pipe. T-bolt clamps are preferred for silicone couplers on intercooler and intake piping where high boost pressure demands extra clamping force. Stainless steel construction is standard on quality performance clamps for corrosion resistance under heat cycling.What clamps work best for exhaust connections?Lap-joint exhaust clamps and two-bolt band clamps are the most common choices for slip-fit exhaust connections. For a cleaner look with leak-free performance, v-band clamps paired with matching flanges offer the best res...
View Clamps Products
Fabrication
Fabrication parts and materials provide the raw components needed to build, repair, and modify custom exhaust systems, turbocharger plumbing, intercooler piping, fuel system lines, oil routing, and engine bay heat management on performance and competition vehicles. Stainless steel tubing, titanium tubing, aluminum charge piping, mandrel bends, pie cuts, flanges, merge collectors, V-band clamps, O2 sensor bungs, AN fittings, PTFE hose kits, braided fuel and oil lines, heat shields, and welding supplies are the backbone of any serious custom fabrication project. Professional fabricators, race team mechanics, and advanced DIY builders who want full control over exhaust routing, charge pipe layout, or fuel system plumbing choose raw fabrication materials rather than pre-bent kits because custom fabrication allows fitment solutions that no universal kit can accommodate. Brands including Vibrant Performance, Ticon Industries, Stainless Bros, Radium Engineering, Fragola, and DEI provide th...
View Fabrication ProductsLet customers speak for us
Looks pretty nice
Looks pretty nice, pricing was good and the reinforcement is a big plus.
Randy H.
Black Ops Auto Works
I emailed customer service to inquire about when it would be shipped
I emailed customer service to inquire about when it would be shipped. They checked and emailed me with the answer. Customer service is A1
Ralph J.
Black Ops Auto Works
Installation was easy
Installation was easy. The price is good and it looks great on the truck.
Ralph J.
RHO Small Grille Badge
Looks as good as it fits
Looks as good as it fits,
zachary d.
Seibon 70-73 Datsun 240Z OE Carbon Fiber Hood
Nothing like it
I love it great sound and response
Luis P.
Legmaker Dodge Durango HEMI Short Ram CAI 2011-Present 5.7L
Car totally diferent with the whole kit
Car totally diferent with the whole kit. Ive stood next to wide bodies and my car gets more attention at times . Ive bought the kit twice already.
Ding D.
2015-2023 Dodge Charger Carbon Fiber Wind Splitters
Fantastic emblem! Exactly what I was looking for
Fantastic emblem! Exactly what I was looking for. Great quality emblem.
Jacobus S.
Direct Connection Black Metallic Fender Badge
Worked great for my aftermarket hood on my Chrysler 2023 300C
Worked great for my aftermarket hood on my Chrysler 2023 300C. Thanks
Robert G.
Windshield Washer Squirter Relocation Kit Universal
Easy to install and makes car sound even better
Easy to install and makes car sound even better love the winn
Tracy H.
Legmaker Challenger/Charger Hellcat Demon & Redeye Air Intake
Awesome customer support
Awesome customer support. Had multiple issues with fedex and these guys were excellent in helping me sort everything out. The drop springs are great too! I highly recommend
Anonymous
Swift Spec-R Lowering springs Jeep Grand Cherokee 2011-2021
100/100! perfect CF crafted cold air intake for 6
100/100! perfect CF crafted cold air intake for 6.4 jeep .. even makes my AWE exhaust sound even deeper and you cam here this thing sucking when accelerating even at normal speeds🥶
srt.boizzz
Legmaker 392 TH Short Ram Jeep Grand Cherokee SRT 2012-2021
