WCFab High Flow Y-Bridge Kit | 2017-2026 L5P Duramax
Maximize airflow and engine efficiency with the WCFab High Flow Y-Bridge Kit. Designed for 2017-2026 Chevrolet Silverado and GMC Sierra 2500HD/3500HD 6.6L L5P Duramax diesel trucks, this upgraded upper intake manifold delivers 33% greater airflow than the OEM Y-bridge while providing more balanced charge-air distribution to both cylinder heads.
Cast in the USA from high-quality 356 aluminum and precision CNC-machined by WCFab, this Y-bridge features an enlarged, port-matched inlet and integrated MAP sensor mounting bosses that position the sensors outside the main airflow path. This design helps reduce oil and soot buildup, maintain accurate sensor readings, and improve long-term reliability. Compatible with stock and modified applications, the kit installs without additional tuning and features a custom powder coat finish.
Key Features
- 33% greater airflow than the factory Y-bridge
- Evenly distributes charge air between both cylinder heads, improving upon the factory 70% driver-side and 30% passenger-side distribution
- High-quality 356 cast aluminum construction, precision CNC-machined by WCFab
- Enlarged air inlet tract with port-matched throttle valve opening
- Integrated MAP sensor mounting bosses reduce exposure to oil and soot buildup
- Compatible with 2017-2022 single MAP sensor and 2023-2026 dual MAP sensor systems
- No additional MAP sensor spacers required
- Compatible with OEM and aftermarket air intake systems and drop-in turbocharger upgrades
- Emissions-compatible, direct bolt-on installation with no tuning required
- Improves throttle response, turbo spool-up, and engine efficiency
- Helps reduce exhaust gas temperatures (EGTs), particularly during towing
- Supports additional horsepower gains with performance tuning and upgraded turbochargers
- Custom powder coat finish
- Made in the USA
Benefits
The WCFab High Flow Y-Bridge Kit reduces intake restrictions and improves charge-air distribution for more efficient engine operation. Its increased airflow capacity supports quicker turbo response, lower EGTs, and improved performance under load, while providing additional airflow potential for high-horsepower builds. The integrated MAP sensor mounting design also helps protect sensor performance by minimizing oil and soot accumulation.
Fitment
Fits 2017-2026 Chevrolet Silverado and GMC Sierra 2500HD/3500HD trucks equipped with the 6.6L L5P Duramax diesel engine. Supports both single and dual MAP sensor configurations.
What's Included
- WCFab High Flow Y-Bridge
- Installation hardware
- Integrated wiring harness mounting points
- Billet aluminum plug for the second MAP sensor port on 2017-2022 applications
