Looking for a mid-length option for your Gen V LT swap build? Speed Engineering's 1-3/4" universal LT swap mid-length headers offer a balance between the compact fitment of a shorty and the performance of a longtube — mandrel bent, TIG-welded, and CNC-machined for a precise, port-matched fit across the most popular classic GM LT swap platforms including Camaro, Chevelle, Nova, C10, and OBS C1500 trucks. Compatible with 5.3L and 6.2L LT1 and LT4 engines. Dyno proven to deliver over 20 rear-wheel horsepower over stock manifolds.
Built from 304 natural stainless steel with merge spikes and standard graphite manifold gaskets included.
⚠️ Important Installation Notes:
- Gen V LT direct injection engine swaps only — these headers are NOT compatible with SBC or BBC engines
- Knock sensor relocation is required for proper installation
- 4L80E or older Turbo 350/400 transmission — bellhousing ears may need to be trimmed for proper clearance due to tight fitment on narrow older frames
Features:
- Full 1-3/4" Port-Matched Primary Tubes with Merge Spikes — Full-diameter flow from cylinder head to collector for maximum exhaust scavenging
- 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 cylinder head for a leak-free seal
- 304 Natural Stainless Steel Construction — Corrosion resistant, heat tolerant, and built to last
- Mid-Length Header Design — A balance between shorty and longtube for improved flow and fitment-friendly profile
- Standard Graphite Manifold Gaskets Included
- Dyno Proven — 20+ RWHP gain on LT swap applications
- Compatible with 5.3L, 6.2L, LT1, and LT4 Engines (2014+)
- V8 LT Engines Only
Vehicle Applications:
Note: All applications listed are Gen V LT swap conversions. These headers are not compatible with the original factory engines in these vehicles.
GM F-Body (RWD) — LT Swap
Chevrolet Camaro
- 1970 Chevrolet Camaro (RWD) — LT Swap
- 1971 Chevrolet Camaro (RWD) — LT Swap
- 1972 Chevrolet Camaro (RWD) — LT Swap
- 1973 Chevrolet Camaro (RWD) — LT Swap
- 1974 Chevrolet Camaro (RWD) — LT Swap
- 1975 Chevrolet Camaro (RWD) — LT Swap
- 1976 Chevrolet Camaro (RWD) — LT Swap
- 1977 Chevrolet Camaro (RWD) — LT Swap
- 1978 Chevrolet Camaro (RWD) — LT Swap
- 1979 Chevrolet Camaro (RWD) — LT Swap
- 1980 Chevrolet Camaro (RWD) — LT Swap
- 1981 Chevrolet Camaro (RWD) — LT Swap
Pontiac Firebird & Trans Am
- 1970 Pontiac Firebird/Trans Am (RWD) — LT Swap
- 1971 Pontiac Firebird/Trans Am (RWD) — LT Swap
- 1972 Pontiac Firebird/Trans Am (RWD) — LT Swap
- 1973 Pontiac Firebird/Trans Am (RWD) — LT Swap
- 1974 Pontiac Firebird/Trans Am (RWD) — LT Swap
- 1975 Pontiac Firebird/Trans Am (RWD) — LT Swap
- 1976 Pontiac Firebird/Trans Am (RWD) — LT Swap
- 1977 Pontiac Firebird/Trans Am (RWD) — LT Swap
- 1978 Pontiac Firebird/Trans Am (RWD) — LT Swap
- 1979 Pontiac Firebird/Trans Am (RWD) — LT Swap
- 1980 Pontiac Firebird/Trans Am (RWD) — LT Swap
- 1981 Pontiac Firebird/Trans Am (RWD) — LT Swap
GM A-Body (RWD) — LT Swap
Chevrolet Chevelle & El Camino
- 1968 Chevrolet Chevelle/El Camino (RWD) — LT Swap
- 1969 Chevrolet Chevelle/El Camino (RWD) — LT Swap
- 1970 Chevrolet Chevelle/El Camino (RWD) — LT Swap
- 1971 Chevrolet Chevelle/El Camino (RWD) — LT Swap
- 1972 Chevrolet Chevelle/El Camino (RWD) — LT Swap
- 1973 Chevrolet Chevelle/El Camino (RWD) — LT Swap
- 1974 Chevrolet Chevelle/El Camino (RWD) — LT Swap
- 1975 Chevrolet Chevelle/El Camino (RWD) — LT Swap
- 1976 Chevrolet Chevelle/El Camino (RWD) — LT Swap
- 1977 Chevrolet Chevelle/El Camino (RWD) — LT Swap
GM X-Body (RWD) — LT Swap
Chevrolet Nova
- 1975 Chevrolet Nova (RWD) — LT Swap
- 1976 Chevrolet Nova (RWD) — LT Swap
- 1977 Chevrolet Nova (RWD) — LT Swap
- 1978 Chevrolet Nova (RWD) — LT Swap
- 1979 Chevrolet Nova (RWD) — LT Swap
GM G-Body (RWD) — LT Swap
Chevrolet Monte Carlo & El Camino
- 1982 Chevrolet Monte Carlo (RWD) — LT Swap
- 1983 Chevrolet Monte Carlo (RWD) — LT Swap
- 1984 Chevrolet Monte Carlo (RWD) — LT Swap
- 1985 Chevrolet Monte Carlo (RWD) — LT Swap
- 1986 Chevrolet Monte Carlo (RWD) — LT Swap
- 1987 Chevrolet Monte Carlo (RWD) — LT Swap
- 1982 Chevrolet El Camino (RWD) — LT Swap
- 1983 Chevrolet El Camino (RWD) — LT Swap
- 1984 Chevrolet El Camino (RWD) — LT Swap
- 1985 Chevrolet El Camino (RWD) — LT Swap
- 1986 Chevrolet El Camino (RWD) — LT Swap
- 1987 Chevrolet El Camino (RWD) — LT Swap
Pontiac Grand Prix
- 1982 Pontiac Grand Prix (RWD) — LT Swap
- 1983 Pontiac Grand Prix (RWD) — LT Swap
- 1984 Pontiac Grand Prix (RWD) — LT Swap
- 1985 Pontiac Grand Prix (RWD) — LT Swap
- 1986 Pontiac Grand Prix (RWD) — LT Swap
- 1987 Pontiac Grand Prix (RWD) — LT Swap
Oldsmobile Cutlass
- 1982 Oldsmobile Cutlass (RWD) — LT Swap
- 1983 Oldsmobile Cutlass (RWD) — LT Swap
- 1984 Oldsmobile Cutlass (RWD) — LT Swap
- 1985 Oldsmobile Cutlass (RWD) — LT Swap
- 1986 Oldsmobile Cutlass (RWD) — LT Swap
- 1987 Oldsmobile Cutlass (RWD) — LT Swap
Buick Regal & Grand National
- 1982 Buick Regal/Grand National (RWD) — LT Swap
- 1983 Buick Regal/Grand National (RWD) — LT Swap
- 1984 Buick Regal/Grand National (RWD) — LT Swap
- 1985 Buick Regal/Grand National (RWD) — LT Swap
- 1986 Buick Regal/Grand National (RWD) — LT Swap
- 1987 Buick Regal/Grand National (RWD) — LT Swap
Chevrolet & GMC C10 Pickups & Panels (RWD) — LT Swap
- 1960 Chevrolet/GMC C10 Pickup/Panel (RWD) — LT Swap
- 1961 Chevrolet/GMC C10 Pickup/Panel (RWD) — LT Swap
- 1962 Chevrolet/GMC C10 Pickup/Panel (RWD) — LT Swap
- 1963 Chevrolet/GMC C10 Pickup/Panel (RWD) — LT Swap
- 1964 Chevrolet/GMC C10 Pickup/Panel (RWD) — LT Swap
- 1965 Chevrolet/GMC C10 Pickup/Panel (RWD) — LT Swap
- 1966 Chevrolet/GMC C10 Pickup/Panel (RWD) — LT Swap
- 1967 Chevrolet/GMC C10 Pickup/Panel (RWD) — LT Swap
- 1968 Chevrolet/GMC C10 Pickup/Panel (RWD) — LT Swap
- 1969 Chevrolet/GMC C10 Pickup/Panel (RWD) — LT Swap
- 1970 Chevrolet/GMC C10 Pickup/Panel (RWD) — LT Swap
- 1971 Chevrolet/GMC C10 Pickup/Panel (RWD) — LT Swap
- 1972 Chevrolet/GMC C10 Pickup/Panel (RWD) — LT Swap
- 1973 Chevrolet/GMC C10 Pickup/Panel (RWD) — LT Swap
- 1974 Chevrolet/GMC C10 Pickup/Panel (RWD) — LT Swap
- 1975 Chevrolet/GMC C10 Pickup/Panel (RWD) — LT Swap
- 1976 Chevrolet/GMC C10 Pickup/Panel (RWD) — LT Swap
- 1977 Chevrolet/GMC C10 Pickup/Panel (RWD) — LT Swap
- 1978 Chevrolet/GMC C10 Pickup/Panel (RWD) — LT Swap
- 1979 Chevrolet/GMC C10 Pickup/Panel (RWD) — LT Swap
- 1980 Chevrolet/GMC C10 Pickup/Panel (RWD) — LT Swap
- 1981 Chevrolet/GMC C10 Pickup/Panel (RWD) — LT Swap
- 1982 Chevrolet/GMC C10 Pickup/Panel (RWD) — LT Swap
- 1983 Chevrolet/GMC C10 Pickup/Panel (RWD) — LT Swap
- 1984 Chevrolet/GMC C10 Pickup/Panel (RWD) — LT Swap
- 1985 Chevrolet/GMC C10 Pickup/Panel (RWD) — LT Swap
- 1986 Chevrolet/GMC C10 Pickup/Panel (RWD) — LT Swap
- 1987 Chevrolet/GMC C10 Pickup/Panel (RWD) — LT Swap
Chevrolet & GMC C1500 OBS Truck (2WD) — LT Swap
- 1988 Chevrolet C1500 Truck (2WD) — LT Swap
- 1989 Chevrolet C1500 Truck (2WD) — LT Swap
- 1990 Chevrolet C1500 Truck (2WD) — LT Swap
- 1991 Chevrolet C1500 Truck (2WD) — LT Swap
- 1992 Chevrolet C1500 Truck (2WD) — LT Swap
- 1993 Chevrolet C1500 Truck (2WD) — LT Swap
- 1994 Chevrolet C1500 Truck (2WD) — LT Swap
- 1995 Chevrolet C1500 Truck (2WD) — LT Swap
- 1996 Chevrolet C1500 Truck (2WD) — LT Swap
- 1997 Chevrolet C1500 Truck (2WD) — LT Swap
- 1998 Chevrolet C1500 Truck (2WD) — LT Swap
- 1988 GMC C1500 Truck (2WD) — LT Swap
- 1989 GMC C1500 Truck (2WD) — LT Swap
- 1990 GMC C1500 Truck (2WD) — LT Swap
- 1991 GMC C1500 Truck (2WD) — LT Swap
- 1992 GMC C1500 Truck (2WD) — LT Swap
- 1993 GMC C1500 Truck (2WD) — LT Swap
- 1994 GMC C1500 Truck (2WD) — LT Swap
- 1995 GMC C1500 Truck (2WD) — LT Swap
- 1996 GMC C1500 Truck (2WD) — LT Swap
- 1997 GMC C1500 Truck (2WD) — LT Swap
- 1998 GMC C1500 Truck (2WD) — LT Swap
FAQ
What is the difference between these LT swap mid-length headers and the LS swap mid-length headers (25-1066)?
The key difference is the engine family. Part 25-1164 is designed for Gen V LT direct injection engine swaps including LT1 and LT4. Part 25-1066 is designed for GM LS engine swaps. Both cover the same classic GM platforms. Make sure you select the correct headers for your specific engine swap.
Is knock sensor relocation required?
Yes. Knock sensor relocation is required for proper installation of these headers on Gen V LT engine swap applications.
Will these headers work with my SBC or BBC engine?
No. These headers are designed for Gen V LT direct injection engine swaps only and are not compatible with SBC or BBC engines.
Will these fit with a 4L80E or older Turbo 350/400 transmission?
These headers may require trimming of the bellhousing ears on 4L80E or older Turbo 350/400 transmissions for proper clearance due to the tight fitment design.
What LT engines are these headers compatible with?
These headers are compatible with GM Gen V LT V8 engines including 5.3L, 6.2L, LT1, and LT4 (2014 and newer).
How much horsepower do these headers add?
Speed Engineering's 1-3/4" LT swap mid-length headers are dyno proven to add over 20 rear-wheel horsepower compared to stock exhaust manifolds on LT swap applications.
What material are these headers made from?
304 natural stainless steel with full TIG-welded construction, CNC-machined port-matched flanges, and merge spikes.
Are gaskets included?
Yes. Standard graphite manifold gaskets are included with the headers.
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).
