Shorty Exhaust Header for Chevrolet Suburban GMC Yukon Cadillac Escalade (2003-2006) 6.0L

High-Flow Stainless Steel Shorty Exhaust Headers for 2003-2006 Chevrolet Suburban, GMC Yukon, Cadillac Escalade (GMT800)

What it Does: The Shorty Exhaust Header set replaces the restrictive factory cast-iron exhaust manifolds on 2003-2006 6.0L Suburban, Yukon, and Escalade models to reduce exhaust backpressure and optimize low-to-mid-range torque.

The Stock GMT800 Exhaust Manifold Failure Point

Factory cast-iron exhaust manifolds on GMT800 platforms frequently suffer from thermal fatigue, resulting in warped mating surfaces and sheared rear cylinder head bolts. Beyond mechanical failure, the restrictive OEM log-manifold architecture forces exhaust pulses from adjoining cylinders to collide, creating intense backpressure and trapping excess combustion heat against the Vortec 6000 cylinder heads.

The Engineering Solution

Fabricated from CNC mandrel-bent 16-gauge 304 stainless steel, these short-tube headers feature smooth 1-3/4 in. primary runners that optimize pulse scavenging from idle through 4,500 RPM. Precision TIG welds resist thermal cracking under heavy towing duty cycles, while 3/8 in. laser-cut head flanges are hydraulically flattened to guarantee a leak-free seal. Retaining the factory 2-1/2 in. collector orientation, this system connects directly to the OEM Y-pipe without cutting or welding.

What's Included

• 2 Shorty exhaust headers (driver and passenger side)
• 2 Header-to-cylinder-head gaskets
• 2 Collector (outlet) gaskets
• Mounting bolts and hardware set

Technical Specifications

Compatibility

• 2003-2006 Chevrolet Suburban 1500 6.0L
• 2003-2006 GMC Yukon 6.0L
• 2003-2006 GMC Yukon XL 1500 / XL 2500 6.0L
• 2003-2006 Cadillac Escalade 6.0L

Frequently Asked Questions & Fitment Warnings

Does this fit the GMT800 Suburban, Yukon, Escalade?

Yes, this is a direct bolt-on fit for 2003-2006 GMT800 SUVs equipped with the LQ4 or LQ9 6.0L V8 engine. It does not fit 4.8L, 5.3L, or 8.1L platforms.

Are modifications or ECU recalibration required?

No, these shorty headers bolt directly to factory catalytic converter downpipes and retain OEM oxygen sensor locations without triggering a check engine light or requiring a custom tune.

The Chevrolet, GMC, Cadillac Truck Standard

Engineered to handle severe duty cycles, these 304 stainless steel headers withstand high exhaust gas temperatures during sustained grade towing without warping or blowing gaskets.