The factory exhaust manifolds on your 5th Gen Camaro SS are one of the first restrictions holding back your LS3 or L99. This complete full kit pairs Speed Engineering's 1-7/8" longtube headers with an off-road connection pipe that ties directly into 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, an aggressive exhaust tone, and long-lasting durability. Dyno proven to deliver over 25 rear-wheel horsepower over stock.
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
- Band clamps are only included with the off-road connection pipe upgrade
Kit Includes:
- 1 Pair of 1-7/8" Stainless Longtube Headers
- 1 Off-Road Connection Pipe / Mid-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 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 LS3/L99 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
- Longtube Header Design — Maximum scavenging efficiency vs. shorty or mid-length headers
- Standard Graphite Manifold Gaskets Included
- Dyno Proven — 25+ RWHP gain on LS3/L99 applications
- Compatible with 6.2L LS3 and L99 Engines
Vehicle Applications:
Chevrolet Camaro SS — LS3/L99 6.2L (5th Gen)
- 2010 Chevrolet Camaro SS (RWD) — 6.2L LS3/L99
- 2011 Chevrolet Camaro SS (RWD) — 6.2L LS3/L99
- 2012 Chevrolet Camaro SS (RWD) — 6.2L LS3/L99
- 2013 Chevrolet Camaro SS (RWD) — 6.2L LS3/L99
- 2014 Chevrolet Camaro SS (RWD) — 6.2L LS3/L99
- 2015 Chevrolet Camaro SS (RWD) — 6.2L LS3/L99
FAQ
What is the difference between the LS3 and L99 engines?
Both are 6.2L V8 engines but the LS3 is paired with manual transmissions and the L99 is paired with automatic transmissions and includes Active Fuel Management (cylinder deactivation). These headers are compatible with both.
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.
Are band clamps included?
Band clamps are only included with the off-road connection pipe upgrade. They are not included with headers only.
What is included in this kit?
The kit includes a pair of 1-7/8" stainless longtube headers, an off-road connection 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 LS spark plug wires and plug wire fire sleeves can also be added at the time of purchase.
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 2010–2015 Camaro SS LS3/L99 applications compared to stock exhaust manifolds.
What material are these headers made from?
304 natural stainless steel with full TIG-welded construction and CNC-machined flanges.
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).
