Upgrading the exhaust on your OBS C1500, K1500, Tahoe, or Yukon with a small block Chevy? Speed Engineering's 1-1/2" SBC shorty headers are a direct-fit upgrade for 1988–1998 C/K1500 truck and SUV applications — mandrel bent, TIG-welded, and CNC-machined with oval ports, a 3" collector, and zinc header bolts included. Fits both 2WD C1500 and 4WD K1500 applications. Built from 304 natural stainless steel with standard graphite manifold gaskets included.
Features:
- 1-1/2" Primary Tubes — Sized for improved flow on SBC 305 and 350 applications
- 1-1/2" x 1-5/8" Oval Ports — Matches standard SBC oval port cylinder head configurations
- 3" Collector — Optimized for strong low-to-mid RPM torque
- Shorty Header Design — Compact fitment-friendly profile for OBS truck and SUV engine bays
- 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
- 3/8"-16x1" Zinc Header Bolts Included
- Fits 2WD (C1500) and 4WD (K1500) Applications
- Compatible with SBC 5.0L/305 and 5.7L/350 V8 Engines
- V8 Engines Only
Vehicle Applications:
Chevrolet C1500 Truck (2WD) — SBC 5.0L/5.7L
- 1988 Chevrolet C1500 Truck (2WD) — SBC 5.0L/5.7L
- 1989 Chevrolet C1500 Truck (2WD) — SBC 5.0L/5.7L
- 1990 Chevrolet C1500 Truck (2WD) — SBC 5.0L/5.7L
- 1991 Chevrolet C1500 Truck (2WD) — SBC 5.0L/5.7L
- 1992 Chevrolet C1500 Truck (2WD) — SBC 5.0L/5.7L
- 1993 Chevrolet C1500 Truck (2WD) — SBC 5.0L/5.7L
- 1994 Chevrolet C1500 Truck (2WD) — SBC 5.0L/5.7L
- 1995 Chevrolet C1500 Truck (2WD) — SBC 5.0L/5.7L
- 1996 Chevrolet C1500 Truck (2WD) — SBC 5.0L/5.7L
- 1997 Chevrolet C1500 Truck (2WD) — SBC 5.0L/5.7L
- 1998 Chevrolet C1500 Truck (2WD) — SBC 5.0L/5.7L
Chevrolet K1500 Truck (4WD) — SBC 5.0L/5.7L
- 1988 Chevrolet K1500 Truck (4WD) — SBC 5.0L/5.7L
- 1989 Chevrolet K1500 Truck (4WD) — SBC 5.0L/5.7L
- 1990 Chevrolet K1500 Truck (4WD) — SBC 5.0L/5.7L
- 1991 Chevrolet K1500 Truck (4WD) — SBC 5.0L/5.7L
- 1992 Chevrolet K1500 Truck (4WD) — SBC 5.0L/5.7L
- 1993 Chevrolet K1500 Truck (4WD) — SBC 5.0L/5.7L
- 1994 Chevrolet K1500 Truck (4WD) — SBC 5.0L/5.7L
- 1995 Chevrolet K1500 Truck (4WD) — SBC 5.0L/5.7L
- 1996 Chevrolet K1500 Truck (4WD) — SBC 5.0L/5.7L
- 1997 Chevrolet K1500 Truck (4WD) — SBC 5.0L/5.7L
- 1998 Chevrolet K1500 Truck (4WD) — SBC 5.0L/5.7L
Chevrolet Tahoe / Blazer SUV (2WD/4WD) — SBC 5.0L/5.7L
- 1988 Chevrolet Tahoe/Blazer (2WD/4WD) — SBC 5.0L/5.7L
- 1989 Chevrolet Tahoe/Blazer (2WD/4WD) — SBC 5.0L/5.7L
- 1990 Chevrolet Tahoe/Blazer (2WD/4WD) — SBC 5.0L/5.7L
- 1991 Chevrolet Tahoe/Blazer (2WD/4WD) — SBC 5.0L/5.7L
- 1992 Chevrolet Tahoe/Blazer (2WD/4WD) — SBC 5.0L/5.7L
- 1993 Chevrolet Tahoe/Blazer (2WD/4WD) — SBC 5.0L/5.7L
- 1994 Chevrolet Tahoe/Blazer (2WD/4WD) — SBC 5.0L/5.7L
- 1995 Chevrolet Tahoe/Blazer (2WD/4WD) — SBC 5.0L/5.7L
- 1996 Chevrolet Tahoe/Blazer (2WD/4WD) — SBC 5.0L/5.7L
- 1997 Chevrolet Tahoe/Blazer (2WD/4WD) — SBC 5.0L/5.7L
- 1998 Chevrolet Tahoe/Blazer (2WD/4WD) — SBC 5.0L/5.7L
GMC C1500 Truck (2WD) — SBC 5.0L/5.7L
- 1988 GMC C1500 Truck (2WD) — SBC 5.0L/5.7L
- 1989 GMC C1500 Truck (2WD) — SBC 5.0L/5.7L
- 1990 GMC C1500 Truck (2WD) — SBC 5.0L/5.7L
- 1991 GMC C1500 Truck (2WD) — SBC 5.0L/5.7L
- 1992 GMC C1500 Truck (2WD) — SBC 5.0L/5.7L
- 1993 GMC C1500 Truck (2WD) — SBC 5.0L/5.7L
- 1994 GMC C1500 Truck (2WD) — SBC 5.0L/5.7L
- 1995 GMC C1500 Truck (2WD) — SBC 5.0L/5.7L
- 1996 GMC C1500 Truck (2WD) — SBC 5.0L/5.7L
- 1997 GMC C1500 Truck (2WD) — SBC 5.0L/5.7L
- 1998 GMC C1500 Truck (2WD) — SBC 5.0L/5.7L
GMC K1500 Truck (4WD) — SBC 5.0L/5.7L
- 1988 GMC K1500 Truck (4WD) — SBC 5.0L/5.7L
- 1989 GMC K1500 Truck (4WD) — SBC 5.0L/5.7L
- 1990 GMC K1500 Truck (4WD) — SBC 5.0L/5.7L
- 1991 GMC K1500 Truck (4WD) — SBC 5.0L/5.7L
- 1992 GMC K1500 Truck (4WD) — SBC 5.0L/5.7L
- 1993 GMC K1500 Truck (4WD) — SBC 5.0L/5.7L
- 1994 GMC K1500 Truck (4WD) — SBC 5.0L/5.7L
- 1995 GMC K1500 Truck (4WD) — SBC 5.0L/5.7L
- 1996 GMC K1500 Truck (4WD) — SBC 5.0L/5.7L
- 1997 GMC K1500 Truck (4WD) — SBC 5.0L/5.7L
- 1998 GMC K1500 Truck (4WD) — SBC 5.0L/5.7L
GMC Yukon / Jimmy SUV (2WD/4WD) — SBC 5.0L/5.7L
- 1988 GMC Yukon/Jimmy (2WD/4WD) — SBC 5.0L/5.7L
- 1989 GMC Yukon/Jimmy (2WD/4WD) — SBC 5.0L/5.7L
- 1990 GMC Yukon/Jimmy (2WD/4WD) — SBC 5.0L/5.7L
- 1991 GMC Yukon/Jimmy (2WD/4WD) — SBC 5.0L/5.7L
- 1992 GMC Yukon/Jimmy (2WD/4WD) — SBC 5.0L/5.7L
- 1993 GMC Yukon/Jimmy (2WD/4WD) — SBC 5.0L/5.7L
- 1994 GMC Yukon/Jimmy (2WD/4WD) — SBC 5.0L/5.7L
- 1995 GMC Yukon/Jimmy (2WD/4WD) — SBC 5.0L/5.7L
- 1996 GMC Yukon/Jimmy (2WD/4WD) — SBC 5.0L/5.7L
- 1997 GMC Yukon/Jimmy (2WD/4WD) — SBC 5.0L/5.7L
- 1998 GMC Yukon/Jimmy (2WD/4WD) — SBC 5.0L/5.7L
FAQ
Do these headers fit both 2WD and 4WD trucks?
Yes. These shorty headers fit both 2WD C1500 and 4WD K1500 applications across Chevrolet and GMC.
What is the difference between these shorty headers and the SBC longtube headers for the C10/K10 platform (25-1236)?
Part 25-1227 is a direct-fit shorty header for the 1988–1998 OBS C/K1500 platform with a more compact profile suited for tight engine bay fitment. Part 25-1236 is a longtube header for the 1960–1987 C10/K10 platform, offering maximum scavenging efficiency with longer primaries. Different vehicles and different header designs — make sure you match to your chassis year.
What port shape do these headers use?
These headers use 1-1/2" x 1-5/8" oval ports, compatible with standard SBC oval port cylinder head configurations.
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.
What bolts are included?
3/8"-16x1" zinc header bolts are included with the headers.
What material are these headers made from?
304 natural stainless steel with full TIG-welded construction and CNC-machined flanges.
Are gaskets included?
Yes. Standard graphite manifold gaskets are included.
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).