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SKU #: WCF-WCF100693-GB
MPN #: WCF100693-GB
Wehrli Custom Fab Y-Bridge Kit 01-04 GM 6.6L Duramax LB7
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Description
Need more air? Your stock intake manifold can be restrictive, making bottlenecks in your air intake system which robs you of performance! Grab Wehrli's Y-Bridge kit that can increase airflow by up to 50% so your engine gets to breathe free.
NOTE: While some colors are kept in stock, other colors will take an extra 10-15 business day delay in powder coating.
Wehrli's Y-Bridge Kit comes with their high flow 3” kit to increase throttle response and turbo spool up by creating a full 3" intake tract from the intercooler outlet to the engine. Eliminates the angled OEM intercooler boots that are prone for failure. Includes FPRV Block off kit to allow proper clearance to larger diameter Y-bridge.
TURBOCHARGER NOTE:NOT RECOMMENDED FOR USE WITH S300 OR S400 STYLE TURBOCHARGERS. If you are planning to run a turbo other than an OEM / IHI style upgraded drop in on your setup, please check out our S300 Single Turbo Kit WCF100478 and our S400 Single Turbo Kit WCF100489 or call us for help placing your order.
Fitment Note:2001 models have the MAP sensor installed on the intake runner rather than the bridge from the factory. Due to the increased size of our bridge over stock, in order to install this kit you will need to relocate the MAP sensor to the port on the new bridge assembly and then drill and tap the runner to install a pipe plug (not included) in the original MAP port location (or source a new intake runner from a later model 02-04 LB7 truck).
BENEFITS AND FEATURES:
- 3" Fabricated Billet Y-Bridge (clearanced for OEM style intake horn)
- 3" Passenger Side Intercooler Pipe
- 14g Mandrel Bent Aluminum Construction
- 50% more airflow than OEM upper intake manifold and cold side charge pipe
- FPRV Block Off Kit
- Silicone Boots
- T-Bolt Clamps
- O-Ring Bridge Flange Gaskets
- Map Sensor Seal and Hold Down Bracket
- Durable Custom Powder Coat Finish
- Made in USA!
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.
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