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
Frequently Asked Questions:
Q: 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.
Q: 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.
Q: 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.
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? 3/8"-16x1" 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 and CNC-machined flanges.
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).