Ready to give your square body C10 a proper true dual exhaust system to match your LS or LT swap? Speed Engineering's axle exit true dual exhaust kit is built specifically for the 1973–1987 C10 platform — 3" mandrel bent 304 natural stainless steel with a true dual X-pipe design, insulated bullet style blow-through mufflers, 3" stainless band clamps, and an adjustable transmission crossmember included for proper fitment clearance. Designed to work with Speed Engineering LS and LT C10 longtube headers.
⚠️ Important Installation Notes:
- Designed to work with Speed Engineering LS & LT C10 1-3/4" and 1-7/8" longtube headers only — part numbers 25-1025, 25-1026, and 25-1058. NOT designed to work with SBC or BBC headers
- Transmission crossmember was prototyped using a 4L60E transmission with the engine in a 1" offset back location. Depending on your transmission and engine offset location, some frame drilling or minor fabrication may be required
Features:
- 3" Mandrel Bent Tubing — Consistent diameter throughout for maximum exhaust flow
- True Dual X-Pipe Design — Balances exhaust pulses between banks for improved tone and mid-range power
- Axle Exit Design — Clean, tucked exit at the rear axle
- Insulated Bullet Style Blow-Through Mufflers — Deep, aggressive exhaust tone with straight-through flow
- Adjustable Transmission Crossmember Included — Engineered for proper exhaust clearance on LS/LT C10 swap configurations
- 3" Stainless Band Clamps Included
- 304 Natural Stainless Steel Construction — Corrosion resistant, heat tolerant, and built to last
- Compatible with LS and LT Engine Swaps
- V8 Engines Only
- Dyno Proven
Vehicle Applications:
Chevrolet C10 Pickup — Square Body (RWD) — LS/LT Swap
- 1973 Chevrolet C10 Pickup (RWD) — LS/LT Swap
- 1974 Chevrolet C10 Pickup (RWD) — LS/LT Swap
- 1975 Chevrolet C10 Pickup (RWD) — LS/LT Swap
- 1976 Chevrolet C10 Pickup (RWD) — LS/LT Swap
- 1977 Chevrolet C10 Pickup (RWD) — LS/LT Swap
- 1978 Chevrolet C10 Pickup (RWD) — LS/LT Swap
- 1979 Chevrolet C10 Pickup (RWD) — LS/LT Swap
- 1980 Chevrolet C10 Pickup (RWD) — LS/LT Swap
- 1981 Chevrolet C10 Pickup (RWD) — LS/LT Swap
- 1982 Chevrolet C10 Pickup (RWD) — LS/LT Swap
- 1983 Chevrolet C10 Pickup (RWD) — LS/LT Swap
- 1984 Chevrolet C10 Pickup (RWD) — LS/LT Swap
- 1985 Chevrolet C10 Pickup (RWD) — LS/LT Swap
- 1986 Chevrolet C10 Pickup (RWD) — LS/LT Swap
- 1987 Chevrolet C10 Pickup (RWD) — LS/LT Swap
Frequently Asked Questions:
Q: What headers does this exhaust system require? This system is designed to work with Speed Engineering LS and LT C10 1-3/4" and 1-7/8" longtube headers only — specifically part numbers 25-1025 (LS 1-3/4"), 25-1026 (LS 1-7/8"), and 25-1058 (LT). It is not compatible with SBC or BBC headers of any kind.
Q: What is the transmission crossmember for? The included adjustable transmission crossmember is designed to provide proper clearance for the exhaust system routing on LS/LT C10 swap configurations. It was prototyped using a 4L60E transmission with the engine in a 1" offset back location. Depending on your specific transmission and engine offset, some frame drilling or minor fabrication may be required.
Q: What mufflers does this system use? Insulated bullet style blow-through mufflers for a deep, aggressive exhaust tone with straight-through flow design.
Q: What size tubing does this system use? All tubing is 3" diameter, mandrel bent for consistent flow throughout. 3" stainless band clamps are included.
Q: Is this the same system as the 1963–1972 C10 true dual axle exit (25-1174)? No. Part 25-1060 is designed specifically for the 1973–1987 square body C10 generation. Part 25-1174 is designed for the 1963–1972 generation. Each system is engineered for the chassis-specific routing of its respective C10 body generation.
Q: What material is this exhaust system made from? 304 natural stainless steel with mandrel-bent tubing and TIG-welded construction. 3" stainless band clamps are included.
Q: Is this exhaust system street legal? No. This is a race-only product 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).
