The factory exhaust manifolds on your C7 Corvette are leaving power on the table. This complete full kit pairs Speed Engineering's 1-7/8" longtube headers with a 3" off-road X-pipe that connects directly to the existing axle-back location — replacing the restrictive factory exhaust manifolds and mid-pipes with a free-flowing stainless system engineered for maximum horsepower gains, aggressive exhaust tone, and great ground clearance for lowered builds. Dyno proven to deliver over 25 rear-wheel horsepower over stock. Covers both the Stingray/Grand Sport (LT1) and Z06 (LT4).
Built from 304 natural stainless steel with mandrel-bent primary tubes, CNC-machined flanges, and full TIG-welded construction.
⚠️ Important Notes:
- Rear downstream O₂ sensors are not used — a check engine light for catalyst efficiency will appear and must be disabled via PCM tuning
- X-pipe is natural stainless steel finish, not polished
- Manual transmission applications will need to reuse the factory exhaust hanger for X-pipe installation
Kit Includes:
- 1 Pair of 1-7/8" Stainless Longtube Headers
- 1 3" Off-Road X-Pipe / Connection Pipe
- 1 Set of Zinc-Coated Header Bolts (upgrade to stainless ARP bolts available at checkout)
- 2 MLS Exhaust Gaskets
Optional: Speed Engineering LT Spark Plug Wires and Plug Wire Fire Sleeves can be added at the time of purchase.
Features:
- Full 1-7/8" Port-Matched Primary Tubes — Maximum flow from cylinder head to collector for aggressive LT performance
- 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
- Great Ground Clearance for Lowered Vehicles — Engineered with extra clearance ideal for lowered C7 builds
- Longtube Header Design — Maximum scavenging efficiency vs. shorty or mid-length headers
- Standard Graphite Manifold Gaskets Included
- Dyno Proven — 25+ RWHP gain on C7 Corvette applications
- Compatible with 6.2L LT1 and LT4 Engines
Vehicle Applications:
Chevrolet C7 Corvette — LT1 6.2L
- 2014 Chevrolet Corvette C7 — 6.2L LT1
- 2015 Chevrolet Corvette C7 — 6.2L LT1
- 2016 Chevrolet Corvette C7 — 6.2L LT1
- 2017 Chevrolet Corvette C7 — 6.2L LT1
- 2018 Chevrolet Corvette C7 — 6.2L LT1
- 2019 Chevrolet Corvette C7 — 6.2L LT1
Chevrolet C7 Corvette Z06 — LT4 6.2L
- 2015 Chevrolet Corvette C7 Z06 — 6.2L LT4
- 2016 Chevrolet Corvette C7 Z06 — 6.2L LT4
- 2017 Chevrolet Corvette C7 Z06 — 6.2L LT4
- 2018 Chevrolet Corvette C7 Z06 — 6.2L LT4
- 2019 Chevrolet Corvette C7 Z06 — 6.2L LT4
Frequently Asked Questions:
Q: What is the difference between this full kit and the headers-only listing (25-1044)? This full kit includes the headers plus the Speed Engineering X-pipe, header bolts, and MLS exhaust gaskets — everything needed for a complete front-to-axle-back connection. The headers-only listing includes just the headers; the X-pipe would need to be purchased separately.
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: Does my manual transmission C7 require any special considerations? Yes. Manual transmission applications will need to reuse the factory exhaust hanger for proper X-pipe installation.
Q: What finish is the X-pipe? The X-pipe is natural stainless steel — not polished.
Q: Are these headers good for lowered C7 Corvettes? Yes. These headers are engineered with great ground clearance, making them a solid choice for lowered C7 builds.
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 C7 Corvette LT1 and LT4 applications compared to stock exhaust manifolds.
Q: What engines are these headers compatible with? These headers are compatible with the 6.2L LT1 found in the 2014–2019 C7 Corvette Base and Grand Sport, and the 6.2L LT4 found in the 2015–2019 C7 Corvette Z06.
Q: What material are these headers made from? 304 natural stainless steel with full TIG-welded construction and CNC-machined flanges.
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)).
