Dropping an LS into your classic C10? Speed Engineering's 1-7/8" LS swap longtube headers are engineered specifically for the 1960–1987 C10 platform with excellent ground clearance for air ride and lowered suspension applications — mandrel bent, TIG-welded, and CNC-machined from 304 natural stainless steel with merge spikes and standard graphite manifold gaskets included. Compatible with the full LS engine family from 4.8L through 6.2L including LS1, LS2, LS3, LS6, and LSA. These headers do not hang below the frame and have been confirmed to fit on Roadster Shop (with Pro spindles), Porterbuilt, Chevy's Block, and other front drop members with air ride and coil-over suspension.
⚠️ Important Installation Notes:
- 2WD only — does NOT fit 4WD (K10)
- 1960–1966 model years require slider engine mounts to clear the front crossmember
- LS swap applications only — these headers are NOT compatible with standard SBC or BBC engines
- Due to older vehicle frame clearance, headers fit very tight and require Speed Engineering spark plug wires
- 4L80E or older Turbo 350/400 transmission — bellhousing ears may need to be trimmed for proper clearance
Features:
- Full 1-7/8" Primary Tubes with Merge Spike — Maximum flow from cylinder head to collector for aggressive LS swap 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 cylinder head 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
- Excellent Ground Clearance — Engineered for air ride and lowered suspension applications, including popular aftermarket front clips
- Standard Graphite Manifold Gaskets Included
- Dyno Proven
- Compatible with 4.8L, 5.3L, 6.0L, 6.2L, LS1, LS2, LS3, LS6, and LSA Engines
- V8 LS Engines Only
Vehicle Applications:
Note: All applications listed are LS swap conversions for the 2WD C10. These headers are not compatible with the original factory engines in these vehicles and do NOT fit 4WD (K10) applications.
Chevrolet C10 Truck (2WD, RWD) — LS Swap
- 1960 Chevrolet C10 Truck (2WD) — LS Swap ⚠️ Requires slider engine mounts to clear front crossmember
- 1961 Chevrolet C10 Truck (2WD) — LS Swap ⚠️ Requires slider engine mounts to clear front crossmember
- 1962 Chevrolet C10 Truck (2WD) — LS Swap ⚠️ Requires slider engine mounts to clear front crossmember
- 1963 Chevrolet C10 Truck (2WD) — LS Swap ⚠️ Requires slider engine mounts to clear front crossmember
- 1964 Chevrolet C10 Truck (2WD) — LS Swap ⚠️ Requires slider engine mounts to clear front crossmember
- 1965 Chevrolet C10 Truck (2WD) — LS Swap ⚠️ Requires slider engine mounts to clear front crossmember
- 1966 Chevrolet C10 Truck (2WD) — LS Swap ⚠️ Requires slider engine mounts to clear front crossmember
- 1967 Chevrolet C10 Truck (2WD) — LS Swap
- 1968 Chevrolet C10 Truck (2WD) — LS Swap
- 1969 Chevrolet C10 Truck (2WD) — LS Swap
- 1970 Chevrolet C10 Truck (2WD) — LS Swap
- 1971 Chevrolet C10 Truck (2WD) — LS Swap
- 1972 Chevrolet C10 Truck (2WD) — LS Swap
- 1973 Chevrolet C10 Truck (2WD) — LS Swap
- 1974 Chevrolet C10 Truck (2WD) — LS Swap
- 1975 Chevrolet C10 Truck (2WD) — LS Swap
- 1976 Chevrolet C10 Truck (2WD) — LS Swap
- 1977 Chevrolet C10 Truck (2WD) — LS Swap
- 1978 Chevrolet C10 Truck (2WD) — LS Swap
- 1979 Chevrolet C10 Truck (2WD) — LS Swap
- 1980 Chevrolet C10 Truck (2WD) — LS Swap
- 1981 Chevrolet C10 Truck (2WD) — LS Swap
- 1982 Chevrolet C10 Truck (2WD) — LS Swap
- 1983 Chevrolet C10 Truck (2WD) — LS Swap
- 1984 Chevrolet C10 Truck (2WD) — LS Swap
- 1985 Chevrolet C10 Truck (2WD) — LS Swap
- 1986 Chevrolet C10 Truck (2WD) — LS Swap
- 1987 Chevrolet C10 Truck (2WD) — LS Swap
Frequently Asked Questions:
Q: Will these headers fit my K10 4WD truck?
No. These headers do NOT fit 4WD applications. They are designed for 2WD C10 trucks only.
Q: Do these headers work with air ride or lowered suspension?
Yes. These headers do not hang below the frame and offer excellent ground clearance for air ride and lowered suspension applications. They have been confirmed to fit on Roadster Shop (with Pro spindles), Porterbuilt, Chevy's Block, and other popular aftermarket front clips with air ride and coil-over suspension.
Q: Do 1960–1966 trucks need anything special?
Yes. 1960–1966 model years require slider engine mounts to clear the front crossmember.
Q: Will these headers work with my SBC or BBC engine?
No. These headers are designed for LS series engine swaps only and are not compatible with standard small block Chevy or big block Chevy engines.
Q: Do I need special spark plug wires?
Yes. Due to tight frame clearance on classic C10 platforms, Speed Engineering spark plug wires are required for proper fitment with these headers.
Q: 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.
Q: What is the difference between these headers and the SBC C10/K10 longtubes (25-1236)?
Part 25-1026 is for LS engine swaps on 2WD C10 trucks only, with 1-7/8" primaries optimized for ground clearance on lowered and air ride builds. Part 25-1236 is for small block Chevy (SBC) applications and fits both 2WD C10 and 4WD K10. Make sure you select headers matching your engine family and drivetrain.
Q: What LS engines are these headers compatible with?
These headers are compatible with GM LS V8 engines including 4.8L, 5.3L, 6.0L, 6.2L, LS1, LS2, LS3, LS6, and LSA.
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 gaskets included?
Yes. Standard graphite manifold gaskets are included.
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).
