The factory exhaust manifolds on your C6 Corvette are leaving power on the table. Speed Engineering's 1-7/8" longtube headers are a direct-fit, dyno-proven upgrade — mandrel bent, TIG-welded, and CNC-machined from 304 natural stainless steel with merge spikes. Engineered with improved ground clearance over competitors — a strong choice for lowered C6 builds. Delivers over 25 rear-wheel horsepower over stock. Speed Engineering X-pipe kit is required for installation and sold separately.
⚠️ Important Notes:
- Speed Engineering X-pipe kit is required for proper installation — sold separately
- Base/GS models: 3" X-pipe with 2.75" reducers to factory exhaust
- Z06 models: 3" X-pipe with 3" connection
- 4L60E transmission: True dual exhaust does NOT work with early 4L60 transmissions. Modification to the passenger side tube is required for 4L60E fitment. Compatible with 6 speed automatic and manual transmissions without modification
- Rear exiting exhaust kit will NOT work with vehicles equipped with a differential cooler
Features:
- Full 1-7/8" Primary Tubes with Merge Spike — Maximum flow from cylinder head to collector for aggressive LS 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
- Improved Ground Clearance Over Competitors — Engineered with extra clearance ideal for lowered C6 builds
- Longtube Header Design — Maximum scavenging efficiency vs. shorty or mid-length headers
- Standard Graphite Manifold Gaskets Included
- Dyno Proven — 25+ RWHP gain on C6 Corvette applications
- Compatible with 6.0L LS2/LS6, 6.2L LS3/LS9, and 7.0L LS7 Engines
- V8 Engines Only
Vehicle Applications:
Chevrolet C6 Corvette Base & Grand Sport (RWD)
- 2005 Chevrolet Corvette C6 (RWD) — 6.0L LS2
- 2006 Chevrolet Corvette C6 (RWD) — 6.0L LS2
- 2007 Chevrolet Corvette C6 (RWD) — 6.0L LS2
- 2008 Chevrolet Corvette C6 (RWD) — 6.2L LS3
- 2009 Chevrolet Corvette C6 (RWD) — 6.2L LS3
- 2010 Chevrolet Corvette C6 (RWD) — 6.2L LS3
- 2011 Chevrolet Corvette C6 (RWD) — 6.2L LS3
- 2012 Chevrolet Corvette C6 (RWD) — 6.2L LS3
- 2013 Chevrolet Corvette C6 (RWD) — 6.2L LS3
Chevrolet C6 Corvette Z06 (RWD)
- 2006 Chevrolet Corvette C6 Z06 (RWD) — 7.0L LS7
- 2007 Chevrolet Corvette C6 Z06 (RWD) — 7.0L LS7
- 2008 Chevrolet Corvette C6 Z06 (RWD) — 7.0L LS7
- 2009 Chevrolet Corvette C6 Z06 (RWD) — 7.0L LS7
- 2010 Chevrolet Corvette C6 Z06 (RWD) — 7.0L LS7
- 2011 Chevrolet Corvette C6 Z06 (RWD) — 7.0L LS7
- 2012 Chevrolet Corvette C6 Z06 (RWD) — 7.0L LS7
- 2013 Chevrolet Corvette C6 Z06 (RWD) — 7.0L LS7
Chevrolet C6 Corvette ZR1 (RWD)
- 2009 Chevrolet Corvette C6 ZR1 (RWD) — 6.2L LS9
- 2010 Chevrolet Corvette C6 ZR1 (RWD) — 6.2L LS9
- 2011 Chevrolet Corvette C6 ZR1 (RWD) — 6.2L LS9
- 2012 Chevrolet Corvette C6 ZR1 (RWD) — 6.2L LS9
- 2013 Chevrolet Corvette C6 ZR1 (RWD) — 6.2L LS9
Frequently Asked Questions:
Q: Is an X-pipe included with these headers? No. These are headers only. The Speed Engineering X-pipe kit is required for installation and is sold separately. Base and Grand Sport models use a 3" X-pipe with 2.75" reducers; Z06 models use a 3" X-pipe with a 3" connection.
Q: What is the difference between these headers and the full kit (25-1128)? These are headers only. The full kit includes the 1-7/8" headers plus the X-pipe, header bolts, and MLS exhaust gaskets — a complete front-to-axle-back connection. Choose headers only if you already have or plan to source the X-pipe separately.
Q: Will these work with my 4L60E transmission? True dual exhaust does not work with early 4L60 transmissions without modification. A modification to the passenger side tube is required for 4L60E fitment. These headers work with 6 speed automatic and manual transmissions without modification.
Q: Will the rear exiting exhaust kit work on my C6? The rear exiting exhaust kit will NOT work with vehicles equipped with a differential cooler.
Q: Are these headers good for lowered C6 Corvettes? Yes. Speed Engineering engineered these headers with improved ground clearance over competitors, making them a strong choice for lowered C6 builds.
Q: How much horsepower do these headers add? Speed Engineering's 1-7/8" longtube headers are dyno proven to add over 25 rear-wheel horsepower on C6 Corvette applications compared to stock exhaust manifolds.
Q: What engines are these headers compatible with? These headers are compatible with the 6.0L LS2/LS6, 6.2L LS3/LS9, and 7.0L LS7 found in 2005–2013 C6 Corvette Base, Z06, and ZR1 models.
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).
