Image coming soonWehrli LBZ/LMM Duramax High Flow 3" Y-Bridge (Bridge Assembly Only)
Can I pick up my order or have it installed at your shop?
Can I pick up my order or have it installed at your shop?
Absolutely. We offer local pickup on most products and full professional installation at our shop in Washington, MO. Whether you just want to grab your parts or have our techs handle the install, we’ve got you covered. Give us a quick call at 636-429-7020 or message us to schedule a visit — we’ll make sure the parts are ready when you arrive.
How do I know if this part fits my vehicle?
How do I know if this part fits my vehicle?
Unsure if it’ll fit? No problem — that’s what we’re here for. Send us your vehicle’s year, make, and model, and we’ll verify fitment before you order. We can also point you toward compatible upgrades or supporting parts if needed.
What if I need to return a product or it’s defective?
What if I need to return a product or it’s defective?
Most unused items can be returned within 30 days in their original packaging. Some products are covered by a manufacturer’s warranty as well. If something arrives damaged or doesn’t meet your expectations, just let us know — we’ll help you get it replaced, refunded, or repaired. (Tracking updates are also emailed automatically once your order ships.)
What's the lead time on custom or fabricated parts?
What's the lead time on custom or fabricated parts?
Many of our parts are built to order — especially fabricated or performance components. These can take additional time to produce before shipping. Lead times vary by manufacturer and demand, but we’ll always keep you updated along the way. If you’re working on a tight schedule, reach out before ordering at 636-429-7020 and we’ll confirm current availability or estimated ship dates.
The factory LBZ and LMM Duramax Y-bridge is a slip-fit two piece design with almost no support, and on a hard working or high boost truck it blows apart. The Wehrli High Flow 3" Y-Bridge (Manufacturer Part # WCF100235) is a bolt-together two piece replacement built for custom performance and racing builds. Bridge assembly only — read the Notes before ordering.
Why Choose the Wehrli High Flow 3" Y-Bridge?
- Bolts together instead of slipping together – the OEM design separates under boost. This one is mechanically fastened, which is the whole point of the part.
- Full 3" high flow path – sized for aftermarket piping and turbo kits running real boost pressure.
- Bolts to the OEM intake runners – the engine side stays factory, no runner modification.
- 3" bead roll connection at the inlet – gives the boot and clamp something to hold onto.
- O-ring seals included – for both the bridge inlet and the intake runners.
- Raw finish as standard – ready for polishing or paint, with custom powder coat available as an upgrade.
- Made in the USA.
Kit Includes
- 3" high flow Y-bridge, two piece bolt together assembly
- O-ring seals for the bridge inlet and intake runners
Fits These Models
2006-2007 Chevrolet Silverado 2500HD/3500HD and GMC Sierra 2500HD/3500HD with the 6.6L Duramax LBZ, and 2007.5-2010 with the 6.6L Duramax LMM.
Specifications
- Bridge: 3" high flow, two piece bolt together
- Inlet: 3" bead roll connection
- Finish: raw as standard, custom powder coat optional
- Shipping weight: 5.0 lbs
- Package dimensions: 20" W x 8" H x 8" L
- Direct replacement for the Y-bridge used in WCF100163 and WCF100164
- Made in the USA
Key Features at a Glance
- Bolt together two piece design - fixes the OEM separation problem.
- Full 3" flow path - built for high boost applications.
- Bolts to OEM intake runners - no engine side modification.
- O-ring seals included - inlet and runners.
- Raw or powder coat - pick your finish above.
Notes
- ⚠ BRIDGE ASSEMBLY ONLY. This does not include the upper cross-over pipe or the passenger side intercooler pipe. If you want a complete Y-bridge kit rather than the bridge on its own, call us before ordering.
- ⚠ Not compatible with OEM piping. This is designed for aftermarket and custom fabricated high flow piping and turbo kits. Integrating it with a factory intercooler system requires additional fabrication work. This is a build part, not a bolt-on.
- Lead time varies by finish. Gloss Black and Raw are stocked and ship in 3-5 business days. Custom powder coat colors are made to order and carry additional lead time.
FASS SKU: [ADD FASS SKU]
Manufacturer Part #: WCF100235
Questions? We’re Here to Help.
Have questions about upgrades for your 6.6L Duramax? Contact FASS Motorsports and we’ll get you dialed:
Phone: 636-429-7020
Email: info@fassmotorsports.com
