Cummins
Shop All
SKU #: WCF-WCF100564-FB
MPN #: WCF100564-FB
Wehrli Custom Fab 3.5" Passenger-Side Hot-Side Intercooler Pipe Kit 98.5-02 Ram 5.9L Cummins
Description
Overview
Designed for 5.9L Cummins applications with the factory turbocharger or upgraded drop-in style turbochargers, this 3.5-inch intercooler pipe helps provide a reliable path for pressurized intake air between the turbocharger and intercooler. The larger diameter and smooth mandrel-bent construction help support increased airflow while reducing potential restrictions in the charge-air system.
The kit includes high-quality silicone boots and stainless steel T-bolt clamps to provide secure connections and help prevent boost leaks. WCFab finishes the pipe with its signature powder coating, with multiple color options available. Installation is straightforward and requires no tuning or additional modifications, making this a true bolt-on upgrade for a stock truck.
NOTE: While some colors are kept in stock, other colors will take an extra 10-15 business day delay in powder coating.
Enter your zip and we'll see if installation is available.
- Request quotes from local installers at checkout
- Compare options and choose the best fit for your install
About WrenchConnected
WrenchConnected is an independent installation marketplace operating in partnership with Diesel Power Products.
How it works
After checkout, we route your vehicle info and part SKU to verified installation shops near you. Local installers review the job and submit competitive bids; you pick the shop you want based on price, reviews, and availability. Your name and email stay private until you select an installer.
Pricing
You pay for the bid from your preferred shop. The full amount is shown before you confirm — installers cannot add charges without your written consent. Payments are processed securely by Stripe.
Your privacy
During bidding, shops see only your service ZIP code, vehicle year/make/model, and the part SKU — not your name, email, or address. Only the shop you select receives your contact details after payment. We never sell your personal information.
More detail at wrenchconnected.com.
A 3.5" high-flow intake horn and intercooler pipe kit that replaces restrictive OEM plastic piping with mandrel-bent aluminum for improved airflow and turbo efficiency.
- Fits
- 1998.5 - 2002 Ram 5.9L Cummins
- Brand
- Wehrli Custom Fabrication
- Best for
- towing, daily driving, or performance builds
- Key features
- 3.5" high-flow intake horn for increased air volume
- Upgraded intercooler piping for improved boost flow and reliability
- High-quality mandrel-bent aluminum construction
- Eliminates restrictive factory intake and piping components
- Includes silicone boots and stainless steel T-bolt clamps
- Multiple 1/8" NPT ports for boost reference or water-meth injection
- Durable powder-coated finish for corrosion resistance
- Direct bolt-on installation – no tuning required
- Key specs
- 3.5" intake horn
- 1/8" NPT ports
- Important
- Some colors are kept in stock, but other colors will take an extra 10-15 business day delay in powder coating.
Summarized by AI from this product’s description and specs. Confirm fitment for your year, make and engine before ordering.
FEATURES & BENEFITS:
- 3.5-inch passenger-side hot-side intercooler pipe
- Precision mandrel-bent aluminum construction
- Designed for the OEM intercooler
- Compatible with OEM and upgraded drop-in style turbochargers
- High-quality silicone boots included
- Stainless steel T-bolt clamps included
- Powder-coated finish with multiple color options
- Helps support increased charge-airflow
- Helps reduce the potential for boost leaks from aging factory components
- No tuning required
- Direct bolt-on installation
- Fits a stock truck without additional modifications
About Wehrli Custom Fabrication
Born from a garage dream in Sandwich, Illinois, and now headquartered in DeKalb, Illinois, Wehrli Custom Fabrication (WCFab) has earned a formidable reputation in the diesel performance world. From its hands-on beginnings to its expansion into a team of 50-plus skilled builders, WCFab continues to elevate diesel upgrades, even as the brand evolves into fabrication and powder coating excellence.
At its core, Wehrli is dedicated to powering Duramax, Powerstroke, and Cummins trucks with rugged, high-performance parts that meet the real-world demands of hauling, towing, and racing. Every product is proudly Made in the USA, from turbo kits and cold air intakes to heavy-duty Allison transmission builds capable of handling up to 750hp, thoroughly crafted in a climate-controlled clean room.
Whether you’re upping airflow with precision CNC-machined intakes and intake horns, clearing the engine bay with billet block-off plates, or commanding raw transportation power with a 750+hp Allison transmission, Wehrli’s work is synonymous with resilience and peak performance. Products like their L5P Duramax high-flow turbo intake horn boast a 27% increase in flow, proving that function and form can coexist beautifully.
Customer support is a serious affair at WCFab they stand firmly behind their fits and finishes Led by the Wehrli brothers and a crew fueled by diesel passion, the brand’s mission is clear: deliver top-tier craftsmanship, unmatched performance, and relentless customer service.
Wehrli Custom Fabrication—where diesel dreams are forged into reality, in metal you can feel and performance you can trust.
Blog
October 06, 2026
The P0087 code signals low fuel rail pressure in diesel trucks, often traced to a failing lift...
Read MoreP0087 Code: Low Fuel Rail Pressure Explained
October 05, 2026
White smoke from a diesel engine means different things depending on when it shows up, how long...
Read MoreWhat Causes White Smoke From a Diesel Engine?
September 28, 2026
This guide covers how a turbo makes boost, the parts that do it, and how to tell...
Read MoreWhat Does a Turbocharger Do? Diesel Turbo Guide
September 11, 2026
In this guide, we’re going to go a little deeper into what exactly DEF is, and then...
Read MoreWhat Is DEF Fluid? Diesel Truck DEF Explained