The factory exhaust manifolds on your 4th Gen Camaro or Firebird are one of the first restrictions holding back your LS1. 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, 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, 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.
Note: These headers also work on 1993–1997 Camaro and Firebird applications equipped with an LS swap conversion.
Kit Includes:
- 1 Pair of 1-7/8" Stainless Longtube Headers
- 1 Three-inch 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 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 — Maximum flow from cylinder head to collector for aggressive LS1 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 LS1 applications
- Compatible with 5.7L LS1 Engines
Vehicle Applications:
Chevrolet Camaro Z28 & SS — LS1 5.7L (4th Gen F-Body)
- 1998 Chevrolet Camaro SS/Z28 (RWD) — 5.7L LS1
- 1999 Chevrolet Camaro SS/Z28 (RWD) — 5.7L LS1
- 2000 Chevrolet Camaro SS/Z28 (RWD) — 5.7L LS1
- 2001 Chevrolet Camaro SS/Z28 (RWD) — 5.7L LS1
- 2002 Chevrolet Camaro SS/Z28 (RWD) — 5.7L LS1
Pontiac Firebird Formula & Trans Am — LS1 5.7L (4th Gen F-Body)
- 1998 Pontiac Firebird Formula/Trans Am (RWD) — 5.7L LS1
- 1999 Pontiac Firebird Formula/Trans Am (RWD) — 5.7L LS1
- 2000 Pontiac Firebird Formula/Trans Am (RWD) — 5.7L LS1
- 2001 Pontiac Firebird Formula/Trans Am (RWD) — 5.7L LS1
- 2002 Pontiac Firebird Formula/Trans Am (RWD) — 5.7L LS1
Note: Also fits 1993–1997 Camaro and Firebird applications with an LS swap conversion.
Frequently Asked Questions:
Q: What is the difference between this full kit and the headers-only listing (25-1020)? This full kit includes the headers plus the Speed Engineering Y-pipe, header bolts, MLS exhaust gaskets, and O₂ extension harnesses — everything needed for a complete front-to-cat-back connection. The headers-only listing includes just the headers. Choose the full kit for an all-in-one purchase; choose headers only if you already have or plan to source the Y-pipe 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: Will these headers work on a 1993–1997 3rd Gen Camaro or Firebird? Yes, with an LS swap conversion. These headers are confirmed to work on 1993–1997 Camaro and Firebird applications equipped with an LS engine swap.
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 sensor 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.
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 1998–2002 Camaro and Firebird LS1 applications compared to stock exhaust manifolds.
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).
