Upgrading the exhaust on your C10 or K10 with a small block Chevy? Speed Engineering's 1-5/8" SBC longtube headers are a direct-fit upgrade for 1960–1987 C10 and K10 truck applications — mandrel bent, TIG-welded, and CNC-machined with oval ports, a 3" collector with merge spike, and zinc header bolts included. Fits both 2WD C10 and 4WD K10 applications. Built from 304 natural stainless steel with standard graphite manifold gaskets included. Dyno proven.
Features:
- 1-5/8" Primary Tubes with Merge Spike — Sized for improved flow on SBC 305 and 350 applications
- 1-3/4" x 1-1/2" Oval Ports — Matches standard SBC oval port cylinder head configurations
- 3" Collector with Merge Spike — Optimized merge geometry for strong low-to-mid RPM torque
- Longtube Header Design — Maximum scavenging efficiency vs. shorty or mid-length headers
- Mandrel Bent Tubing — Consistent tube diameter throughout; no crimping, no restriction
- CNC Machined Flanges — Precision fit at the cylinder head for a leak-free seal
- 17-3/8" Center to Center Outer Bolt Holes — Standard SBC bolt spacing for direct fitment verification
- 304 Natural Stainless Steel Construction — Corrosion resistant, heat tolerant, and built to last
- Standard Graphite Manifold Gaskets Included
- 10x1.5x25 Zinc Header Bolts Included
- Fits 2WD (C10) and 4WD (K10) Applications
- Compatible with SBC 5.0L/305 and 5.7L/350 V8 Engines
- V8 Engines Only
Vehicle Applications:
Chevrolet C10 Truck (2WD) — SBC 5.0L/5.7L
- 1960 Chevrolet C10 Truck (RWD) — SBC 5.0L/5.7L
- 1961 Chevrolet C10 Truck (RWD) — SBC 5.0L/5.7L
- 1962 Chevrolet C10 Truck (RWD) — SBC 5.0L/5.7L
- 1963 Chevrolet C10 Truck (RWD) — SBC 5.0L/5.7L
- 1964 Chevrolet C10 Truck (RWD) — SBC 5.0L/5.7L
- 1965 Chevrolet C10 Truck (RWD) — SBC 5.0L/5.7L
- 1966 Chevrolet C10 Truck (RWD) — SBC 5.0L/5.7L
- 1967 Chevrolet C10 Truck (RWD) — SBC 5.0L/5.7L
- 1968 Chevrolet C10 Truck (RWD) — SBC 5.0L/5.7L
- 1969 Chevrolet C10 Truck (RWD) — SBC 5.0L/5.7L
- 1970 Chevrolet C10 Truck (RWD) — SBC 5.0L/5.7L
- 1971 Chevrolet C10 Truck (RWD) — SBC 5.0L/5.7L
- 1972 Chevrolet C10 Truck (RWD) — SBC 5.0L/5.7L
- 1973 Chevrolet C10 Truck (RWD) — SBC 5.0L/5.7L
- 1974 Chevrolet C10 Truck (RWD) — SBC 5.0L/5.7L
- 1975 Chevrolet C10 Truck (RWD) — SBC 5.0L/5.7L
- 1976 Chevrolet C10 Truck (RWD) — SBC 5.0L/5.7L
- 1977 Chevrolet C10 Truck (RWD) — SBC 5.0L/5.7L
- 1978 Chevrolet C10 Truck (RWD) — SBC 5.0L/5.7L
- 1979 Chevrolet C10 Truck (RWD) — SBC 5.0L/5.7L
- 1980 Chevrolet C10 Truck (RWD) — SBC 5.0L/5.7L
- 1981 Chevrolet C10 Truck (RWD) — SBC 5.0L/5.7L
- 1982 Chevrolet C10 Truck (RWD) — SBC 5.0L/5.7L
- 1983 Chevrolet C10 Truck (RWD) — SBC 5.0L/5.7L
- 1984 Chevrolet C10 Truck (RWD) — SBC 5.0L/5.7L
- 1985 Chevrolet C10 Truck (RWD) — SBC 5.0L/5.7L
- 1986 Chevrolet C10 Truck (RWD) — SBC 5.0L/5.7L
- 1987 Chevrolet C10 Truck (RWD) — SBC 5.0L/5.7L
Chevrolet K10 Truck (4WD) — SBC 5.0L/5.7L
- 1960 Chevrolet K10 Truck (4WD) — SBC 5.0L/5.7L
- 1961 Chevrolet K10 Truck (4WD) — SBC 5.0L/5.7L
- 1962 Chevrolet K10 Truck (4WD) — SBC 5.0L/5.7L
- 1963 Chevrolet K10 Truck (4WD) — SBC 5.0L/5.7L
- 1964 Chevrolet K10 Truck (4WD) — SBC 5.0L/5.7L
- 1965 Chevrolet K10 Truck (4WD) — SBC 5.0L/5.7L
- 1966 Chevrolet K10 Truck (4WD) — SBC 5.0L/5.7L
- 1967 Chevrolet K10 Truck (4WD) — SBC 5.0L/5.7L
- 1968 Chevrolet K10 Truck (4WD) — SBC 5.0L/5.7L
- 1969 Chevrolet K10 Truck (4WD) — SBC 5.0L/5.7L
- 1970 Chevrolet K10 Truck (4WD) — SBC 5.0L/5.7L
- 1971 Chevrolet K10 Truck (4WD) — SBC 5.0L/5.7L
- 1972 Chevrolet K10 Truck (4WD) — SBC 5.0L/5.7L
- 1973 Chevrolet K10 Truck (4WD) — SBC 5.0L/5.7L
- 1974 Chevrolet K10 Truck (4WD) — SBC 5.0L/5.7L
- 1975 Chevrolet K10 Truck (4WD) — SBC 5.0L/5.7L
- 1976 Chevrolet K10 Truck (4WD) — SBC 5.0L/5.7L
- 1977 Chevrolet K10 Truck (4WD) — SBC 5.0L/5.7L
- 1978 Chevrolet K10 Truck (4WD) — SBC 5.0L/5.7L
- 1979 Chevrolet K10 Truck (4WD) — SBC 5.0L/5.7L
- 1980 Chevrolet K10 Truck (4WD) — SBC 5.0L/5.7L
- 1981 Chevrolet K10 Truck (4WD) — SBC 5.0L/5.7L
- 1982 Chevrolet K10 Truck (4WD) — SBC 5.0L/5.7L
- 1983 Chevrolet K10 Truck (4WD) — SBC 5.0L/5.7L
- 1984 Chevrolet K10 Truck (4WD) — SBC 5.0L/5.7L
- 1985 Chevrolet K10 Truck (4WD) — SBC 5.0L/5.7L
- 1986 Chevrolet K10 Truck (4WD) — SBC 5.0L/5.7L
- 1987 Chevrolet K10 Truck (4WD) — SBC 5.0L/5.7L
Frequently Asked Questions:
Q: Do these headers fit 4WD K10 trucks as well as 2WD C10s? Yes. Unlike the LS swap longtube headers for this platform which are 2WD only, these SBC longtube headers are engineered for both 2WD C10 and 4WD K10 applications.
Q: What is the difference between these headers and the LS swap C10 longtube headers (25-1025)? Part 25-1236 is designed for original small block Chevy 305 and 350 engines and fits both C10 (2WD) and K10 (4WD) trucks. Part 25-1025 is designed for LS engine swap conversions and fits 2WD C10 applications only. Make sure to select the correct headers for your engine.
Q: What port shape do these headers use? These headers use 1-3/4" x 1-1/2" oval ports, compatible with standard SBC oval port cylinder head configurations.
Q: What is the bolt hole spacing on these headers? The outer bolt holes are 17-3/8" center to center, matching standard SBC head bolt spacing.
Q: What bolts are included? 10x1.5x25 zinc header bolts are included with the headers.
Q: What material are these headers made from? 304 natural stainless steel with full TIG-welded construction, CNC-machined flanges, and a merge spike.
Q: Are gaskets included? Yes. Standard graphite manifold gaskets are included with the headers.
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).