LS Engine Swap Headers for Chevrolet S-10 Blazer GMC Sonoma Jimmy (1982-2004) 4.8L 5.3L 5.7L 6.0L 6.2L

High-Flow LS Swap Headers for 1982-2004 Chevrolet, GMC S-10, Blazer, Sonoma, Jimmy (GMT325 / GMT330)

What it Does: The LS engine swap headers eliminate tight engine bay clearance restrictions on 1982-2004 S-10, Blazer, Sonoma, and Jimmy 2WD models to optimize exhaust scavenging when installing a GM Gen III or Gen IV V8.

The Stock Chevrolet, GMC S-10, Blazer, Sonoma, Jimmy Engine Bay Clearance Deficit

Swapping an LS V8 into the compact GMT325 and GMT330 chassis introduces immediate packaging issues. Factory truck and passenger-car cast exhaust manifolds collide directly with the steering shaft, frame rails, and firewall. Reusing standard manifolds causes severe physical interference, restrictive exhaust gas choking, excessive backpressure, and localized heat soak that degrades underhood wiring and steering linkages.

The Engineering Solution

Constructed from polished stainless steel, these headers utilize precision mandrel-bent 1-5/8" primary tubes to accelerate exhaust gas velocity and bolster low-to-mid range torque. Robotically TIG-welded seams prevent thermal fatigue and cracking, while heavy-duty 3/8" CNC-machined head flanges resist thermal warpage to eliminate gasket blowout. The primaries merge seamlessly into 2-1/2" collectors, engineered specifically to route exhaust gases cleanly around the 2WD steering column and chassis components.

What's Included

• 1x Driver-Side (Left) Stainless Steel LS Swap Header
• 1x Passenger-Side (Right) Stainless Steel LS Swap Header
• Exhaust Header Gaskets
• Header Flange Mounting Bolts and Installation Hardware

Technical Specifications

Compatibility

• 1982-2004 Chevrolet S-10 Pickup (2WD Only)
• 1983-2004 Chevrolet S-10 Blazer / Blazer (2WD Only)
• 1982-2004 GMC S-15 / Sonoma Pickup (2WD Only)
• 1983-2001 GMC S-15 Jimmy / Jimmy (2WD Only)
• Compatible with GM Gen III & Gen IV LS-series V8 swaps: 4.8L, 5.3L, 5.7L, 6.0L, 6.2L

Frequently Asked Questions & Fitment Warnings

Does this fit the GMT325 / GMT330 S-10, Blazer, Sonoma, Jimmy?

Yes, this is a direct fit for the 1982-2004 Chevrolet, GMC S-10, Blazer, Sonoma, Jimmy equipped with an LS-series V8 engine swap. Does not fit 4WD or AWD configurations, and will not bolt up to factory 2.2L, 2.5L, 2.8L, or 4.3L engines.

Are modifications required to clear the steering shaft?

These headers are routed specifically to clear the factory 2WD steering shaft, though minor engine placement adjustments may be required depending on your specific aftermarket swap mount brackets.

The Chevrolet, GMC Truck Caliber

Built to handle high-demand street and track duty, this stainless steel header assembly withstands intense exhaust gas temperatures and chassis flex, maintaining leak-free performance and dependable power delivery.