The factory exhaust manifolds on your 2019–2024 Silverado or Sierra are one of the first restrictions holding back your LT engine. This complete full kit pairs Speed Engineering's 1-7/8" longtube headers with a 3" off-road Y-pipe that connects directly to the existing cat-back location — replacing the restrictive factory exhaust manifolds and mid-pipes with a free-flowing stainless system designed for significant horsepower gains, improved throttle response, and a deeper, more aggressive exhaust tone. Dyno proven to deliver over 25 rear-wheel horsepower over stock.
Built from 304 natural stainless steel with mandrel-bent primary tubes, merge spikes, CNC-machined flanges, and full TIG-welded construction.
⚠️ Important Note: Rear downstream O₂ sensors are not used. A check engine light for catalyst efficiency will appear and must be disabled via PCM tuning.
Kit Includes:
- 1 Pair of 1-7/8" Stainless Longtube Headers
- 1 3" Off-Road Y-Pipe / Connection Pipe
- 1 Set of Zinc-Coated Header Bolts (upgrade to stainless ARP bolts available at checkout)
- 2 MLS Exhaust Gaskets
- 2 O₂ Extension Harnesses
Optional: Speed Engineering LS/LT Spark Plug Wires and Plug Wire Fire Sleeves can be added at the time of purchase.
Features:
- Full 1-7/8" Primary Tubes with Merge Spikes — Full-diameter flow from cylinder head to collector for maximum exhaust scavenging
- 3" Collector — Optimized for strong low-to-mid RPM torque
- Mandrel Bent Tubing — Consistent tube diameter through every bend; no crimping, no restriction
- CNC Machined Flanges — Precision fit at the head and collector for a leak-free seal
- 304 Natural Stainless Steel Construction — Corrosion resistant, heat tolerant, and built to last
- Compatible with 8 Speed and 10 Speed Automatic Transmissions
- Longtube Header Design — Maximum scavenging efficiency vs. shorty or mid-length headers
- Standard Graphite Manifold Gaskets Included
- Dyno Proven — 25+ RWHP gain on 5.3L and 6.2L applications
- Compatible with 5.3L and 6.2L LT V8 Engines
- V8 Engines Only
Vehicle Applications:
Chevrolet Silverado 1500 (2WD/4WD) — 5.3L/6.2L
- 2019 Chevrolet Silverado 1500 (2WD/4WD) — 5.3L/6.2L
- 2020 Chevrolet Silverado 1500 (2WD/4WD) — 5.3L/6.2L
- 2021 Chevrolet Silverado 1500 (2WD/4WD) — 5.3L/6.2L
- 2022 Chevrolet Silverado 1500 (2WD/4WD) — 5.3L/6.2L
- 2023 Chevrolet Silverado 1500 (2WD/4WD) — 5.3L/6.2L
- 2024 Chevrolet Silverado 1500 (2WD/4WD) — 5.3L/6.2L
GMC Sierra 1500 (2WD/4WD) — 5.3L/6.2L
- 2019 GMC Sierra 1500 (2WD/4WD) — 5.3L/6.2L
- 2020 GMC Sierra 1500 (2WD/4WD) — 5.3L/6.2L
- 2021 GMC Sierra 1500 (2WD/4WD) — 5.3L/6.2L
- 2022 GMC Sierra 1500 (2WD/4WD) — 5.3L/6.2L
- 2023 GMC Sierra 1500 (2WD/4WD) — 5.3L/6.2L
- 2024 GMC Sierra 1500 (2WD/4WD) — 5.3L/6.2L
Chevrolet Tahoe (2WD/4WD)
- 2021 Chevrolet Tahoe (2WD/4WD) — 5.3L/6.2L
- 2022 Chevrolet Tahoe (2WD/4WD) — 5.3L/6.2L
- 2023 Chevrolet Tahoe (2WD/4WD) — 5.3L/6.2L
- 2024 Chevrolet Tahoe (2WD/4WD) — 5.3L/6.2L
GMC Yukon & Yukon Denali (2WD/4WD)
- 2019 GMC Yukon (2WD/4WD) — 5.3L/6.2L
- 2020 GMC Yukon (2WD/4WD) — 5.3L/6.2L
- 2021 GMC Yukon/Yukon Denali (2WD/4WD) — 5.3L/6.2L
- 2022 GMC Yukon/Yukon Denali (2WD/4WD) — 5.3L/6.2L
- 2023 GMC Yukon/Yukon Denali (2WD/4WD) — 5.3L/6.2L
- 2024 GMC Yukon/Yukon Denali (2WD/4WD) — 5.3L/6.2L
Cadillac Escalade (2WD/4WD)
- 2021 Cadillac Escalade (2WD/4WD) — 6.2L
- 2022 Cadillac Escalade (2WD/4WD) — 6.2L
- 2023 Cadillac Escalade (2WD/4WD) — 6.2L
- 2024 Cadillac Escalade (2WD/4WD) — 6.2L
Frequently Asked Questions:
Q: Will I get a check engine light after installing this kit? Yes. The rear downstream O₂ sensors are not used with this system, which will trigger a catalyst efficiency code. This must be resolved through PCM tuning and cannot be cleared by simply resetting the ECU.
Q: What transmissions does this kit work with? The Y-pipe and X-pipe kit are compatible with 8 speed and 10 speed automatic transmissions.
Q: What is included in this kit? The kit includes a pair of 1-7/8" stainless longtube headers, a 3" off-road Y-pipe, two MLS exhaust gaskets, two O₂ extension harnesses, and zinc-coated header bolts. An upgrade to stainless ARP bolts is available at checkout. Speed Engineering spark plug wires and plug wire fire sleeves can also be added at the time of purchase.
Q: How much horsepower does this kit add? Speed Engineering's 1-7/8" longtube headers are dyno proven to add over 25 rear-wheel horsepower on 2019–2024 Silverado and Sierra 5.3L and 6.2L applications compared to stock exhaust manifolds.
Q: What engines are compatible with this kit? These headers are compatible with 5.3L and 6.2L LT V8 engines found in 2019–2024 Silverado 1500, Sierra 1500, and full-size SUV applications.
Q: What material are these headers made from? 304 natural stainless steel with full TIG-welded construction, CNC-machined flanges, and merge spikes.
Q: Are these headers street legal? No. These are race-only headers 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).