The factory exhaust manifolds on your 5.0L Coyote F-150 are a known restriction. Speed Engineering's 1-7/8" longtube headers and 3" off-road Y-pipe replace them with a complete, direct-fit stainless system that unlocks real exhaust flow, improves throttle response, and delivers over 25 rear-wheel horsepower over stock. The Y-pipe connects directly to the existing cat-back location, making this a true bolt-on system — everything you need is in the box.
Built from 304 natural stainless steel with mandrel-bent primary tubes, CNC-machined port-matched flanges, and full TIG-welded construction.
Kit Includes:
- 1 Pair of 1-7/8" Stainless Longtube Headers
- 1 3" Off-Road Y-Pipe / Connection Pipe
- 2 MLS Exhaust Gaskets
- O₂ Sensor Extension Harnesses (included based on year selected — see O₂ Extension Guide below)
Optional: Zinc Coated Header Bolts (M10x1.5) can be added at the time of purchase.
Features:
- 1-7/8" Port-Matched Primary Tubes — 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 Port-Matched 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
- Longtube Header Design — Maximum scavenging efficiency vs. shorty or mid-length headers
- Standard Graphite Manifold Gaskets Included
- Dyno Proven — 25+ RWHP gain on 5.0L Coyote applications
- V8 Only — Compatible with 5.0L Coyote engines only
O₂ Extension Guide — Select Your Year at Checkout:
- 2011–2014: No O₂ Extensions Required
- 2015–2017: Square 6-Pin O₂ Extensions
- 2018–2025: Flat 5-Pin O₂ Extensions
Make sure to select the correct year range at checkout to receive the proper O₂ extensions for your truck.
Important Installation Notes:
- 2011–2020 models will require minor modification at the cat-back mounting location
- Rear downstream O₂ sensors will no longer be used — a check engine light for catalyst efficiency will appear and must be disabled via PCM tuning
- Header bolt thread pitch varies by Coyote generation — verify before installation:
- Early Gen 1 (2011) and some Gen 3 (2018+): M10x1.25
- Late Gen 1 (2011) and Gen 2 (2015–2017): M10x1.5
Vehicle Applications:
Ford F-150 — 5.0L Coyote (2WD/4WD)
- 2011 Ford F-150 (2WD/4WD) — 5.0L Coyote ⚠️ Minor cat-back modification required
- 2012 Ford F-150 (2WD/4WD) — 5.0L Coyote ⚠️ Minor cat-back modification required
- 2013 Ford F-150 (2WD/4WD) — 5.0L Coyote ⚠️ Minor cat-back modification required
- 2014 Ford F-150 (2WD/4WD) — 5.0L Coyote ⚠️ Minor cat-back modification required
- 2015 Ford F-150 (2WD/4WD) — 5.0L Coyote ⚠️ Minor cat-back modification required
- 2016 Ford F-150 (2WD/4WD) — 5.0L Coyote ⚠️ Minor cat-back modification required
- 2017 Ford F-150 (2WD/4WD) — 5.0L Coyote ⚠️ Minor cat-back modification required
- 2018 Ford F-150 (2WD/4WD) — 5.0L Coyote ⚠️ Minor cat-back modification required
- 2019 Ford F-150 (2WD/4WD) — 5.0L Coyote ⚠️ Minor cat-back modification required
- 2020 Ford F-150 (2WD/4WD) — 5.0L Coyote ⚠️ Minor cat-back modification required
- 2021 Ford F-150 (2WD/4WD) — 5.0L Coyote
- 2022 Ford F-150 (2WD/4WD) — 5.0L Coyote
- 2023 Ford F-150 (2WD/4WD) — 5.0L Coyote
- 2024 Ford F-150 (2WD/4WD) — 5.0L Coyote
- 2025 Ford F-150 (2WD/4WD) — 5.0L Coyote
FAQ
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, and O₂ sensor extension harnesses based on the year range selected at checkout. Zinc coated header bolts (M10x1.5) are available as an optional add-on at the time of purchase.
Which O₂ extensions do I need for my F-150?
It depends on your model year. 2011–2014 trucks do not require O₂ extensions. 2015–2017 trucks use square 6-pin O₂ extensions. 2018–2025 trucks use flat 5-pin O₂ extensions. Select the correct year range at checkout and the proper extensions will be included.
Will I get a check engine light after installing this kit?
Yes. The rear downstream O₂ sensors are no longer used with this system, which will trigger a catalyst efficiency code. This must be resolved through PCM tuning — it cannot be cleared by simply resetting the ECU.
Do 2011–2020 F-150 models require any modifications?
Yes. 2011–2020 models will require minor modification at the cat-back mounting location for proper fitment of the Y-pipe. 2021–2025 models are a direct bolt-on with no modification needed.
How much horsepower do these headers add to a 5.0L Coyote F-150?
Speed Engineering's 1-7/8" longtube headers are dyno proven to add over 25 rear-wheel horsepower on 5.0L Coyote F-150 applications compared to stock exhaust manifolds.
What header bolt size do I need for my F-150?
Header bolt thread pitch varies by Coyote generation. Early Gen 1 (2011) and some Gen 3 (2018+) engines use M10x1.25 bolts. Late Gen 1 (2011) and Gen 2 (2015–2017) engines use M10x1.5 bolts. Verify your thread pitch before installation.
Will this Y-pipe connect to my existing cat-back exhaust?
Yes. The 3" Y-pipe connects directly to the factory cat-back location on 2021–2025 models. 2011–2020 models will require minor modification at the cat-back mounting flange.
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).
