Connecting your Speed Engineering longtube headers to the cat-back on your K2XX Silverado, Sierra, or full-size SUV? This is the Y-pipe that completes the system. Built from 3" mandrel bent 304 natural stainless steel with a 3.5" exit, an optional 3" reducer, TIG-welded construction, and stainless band clamps included. An optional wideband O₂ bung is available for tuning applications. Compatible with 6 speed and 8 speed automatic transmissions.
⚠️ Important: This system is designed to work with Speed Engineering longtube headers only. It is NOT compatible with factory exhaust manifolds.
Features:
- 3" Mandrel Bent Tubing — Consistent diameter throughout for maximum exhaust flow
- 3.5" Y-Pipe Exit with Optional 3" Reducer — Flexibility to connect to standard 3" cat-back systems
- Optional Wideband Tuning Bung — Available for wideband O₂ sensor placement for tuning applications
- Compatible with 6 Speed and 8 Speed Automatic Transmissions
- Stainless Steel Band Clamps Included
- 304 Natural Stainless Steel Construction — Corrosion resistant, heat tolerant, and built to last
- Dyno Proven
Vehicle Applications:
Chevrolet Silverado 1500 (2WD/4WD) — 4.8L/5.3L/6.2L
- 2014 Chevrolet Silverado 1500 (2WD/4WD) — 4.8L/5.3L/6.2L
- 2015 Chevrolet Silverado 1500 (2WD/4WD) — 4.8L/5.3L/6.2L
- 2016 Chevrolet Silverado 1500 (2WD/4WD) — 4.8L/5.3L/6.2L
- 2017 Chevrolet Silverado 1500 (2WD/4WD) — 4.8L/5.3L/6.2L
- 2018 Chevrolet Silverado 1500 (2WD/4WD) — 4.8L/5.3L/6.2L
- 2019 Chevrolet Silverado 1500 (2WD/4WD) — 4.8L/5.3L/6.2L ⚠️ Classic body style only
GMC Sierra 1500 (2WD/4WD) — 4.8L/5.3L/6.2L
- 2014 GMC Sierra 1500 (2WD/4WD) — 4.8L/5.3L/6.2L
- 2015 GMC Sierra 1500 (2WD/4WD) — 4.8L/5.3L/6.2L
- 2016 GMC Sierra 1500 (2WD/4WD) — 4.8L/5.3L/6.2L
- 2017 GMC Sierra 1500 (2WD/4WD) — 4.8L/5.3L/6.2L
- 2018 GMC Sierra 1500 (2WD/4WD) — 4.8L/5.3L/6.2L
- 2019 GMC Sierra 1500 (2WD/4WD) — 4.8L/5.3L/6.2L ⚠️ Classic body style only
Chevrolet Tahoe (2WD/4WD)
- 2015 Chevrolet Tahoe (2WD/4WD) — 5.3L/6.2L
- 2016 Chevrolet Tahoe (2WD/4WD) — 5.3L/6.2L
- 2017 Chevrolet Tahoe (2WD/4WD) — 5.3L/6.2L
- 2018 Chevrolet Tahoe (2WD/4WD) — 5.3L/6.2L
- 2019 Chevrolet Tahoe (2WD/4WD) — 5.3L/6.2L
- 2020 Chevrolet Tahoe (2WD/4WD) — 5.3L/6.2L
GMC Yukon & Yukon Denali (2WD/4WD)
- 2015 GMC Yukon/Yukon Denali (2WD/4WD) — 5.3L/6.2L
- 2016 GMC Yukon/Yukon Denali (2WD/4WD) — 5.3L/6.2L
- 2017 GMC Yukon/Yukon Denali (2WD/4WD) — 5.3L/6.2L
- 2018 GMC Yukon/Yukon Denali (2WD/4WD) — 5.3L/6.2L
- 2019 GMC Yukon/Yukon Denali (2WD/4WD) — 5.3L/6.2L
- 2020 GMC Yukon/Yukon Denali (2WD/4WD) — 5.3L/6.2L
Cadillac Escalade (2WD/4WD)
- 2015 Cadillac Escalade (2WD/4WD) — 6.2L
- 2016 Cadillac Escalade (2WD/4WD) — 6.2L
- 2017 Cadillac Escalade (2WD/4WD) — 6.2L
- 2018 Cadillac Escalade (2WD/4WD) — 6.2L
- 2019 Cadillac Escalade (2WD/4WD) — 6.2L
- 2020 Cadillac Escalade (2WD/4WD) — 6.2L
FAQ
Will this Y-pipe work with my factory exhaust manifolds?
No. This Y-pipe is designed for use with Speed Engineering longtube headers only. It is not compatible with factory exhaust manifolds.
What transmissions does this Y-pipe work with?
This Y-pipe is compatible with 6 speed and 8 speed automatic transmissions.
What is the exit diameter on this Y-pipe?
This Y-pipe features a 3.5" exit with an optional 3" reducer available for connecting to standard 3" cat-back systems.
Is a wideband O₂ bung included?
An optional wideband O₂ bung is available for wideband sensor placement for tuning applications.
Does this fit the 2019 Silverado and Sierra?
Yes, but Classic body style only. The 2019 model year saw both the outgoing K2XX Classic body and the new T1XX body. This Y-pipe fits the K2XX Classic body style only. For 2019+ T1XX body style trucks see part 25-1153.
What material is this Y-pipe made from?
304 natural stainless steel with mandrel-bent tubing and TIG-welded construction. Stainless band clamps are included.
Is this Y-pipe street legal?
No. This is a race-only product intended for closed-course competition use only. Installation on a street-driven vehicle may violate the Clean Air Act (42 U.S.C. 7522(a)(3)).
⚠️ Race Use Only: This product is manufactured and sold for installation on vehicles used solely for competition. Once installed, the vehicle may not be used, registered, or licensed for use on a public road or highway. Installation on a street-driven vehicle may violate the Clean Air Act 203(a)(3), 42 U.S.C. 7522(a)(3).
