Shorty Exhaust Header for Chevrolet Tahoe Suburban GMC Yukon (2000-2006) 4.8L 5.3L

High-Flow Shorty Exhaust Headers for 2000-2006 Chevrolet, GMC Tahoe, Suburban, Yukon (GMT800)

What it Does: The shorty exhaust header set replaces restrictive factory cast iron manifolds on 2000-2006 GMT800 SUVs to minimize exhaust backpressure and optimize low-to-mid RPM scavenging efficiency.

The Stock Chevrolet, GMC Tahoe, Suburban, Yukon Manifold Restrictions

Factory GMT800 trucks and SUVs equipped with the LR4 and LM7 engines rely on heavy cast iron log manifolds. These OEM units suffer from abrupt internal turns and unequal runner paths that choke cylinder evacuation, trapping exhaust heat and creating high pumping losses. Over repeated thermal cycles, factory cast iron is notorious for warping and shearing the rear cylinder head exhaust manifold bolts (cylinders 7 and 8), creating persistent exhaust leaks that trigger faulty downstream oxygen sensor readings.

The Engineering Solution

This header system is built from fully mandrel-bent 16-gauge (1.5mm) 304 stainless steel, providing a smooth, uniform internal radius across all 1-5/8 in. (42mm) primary runners. The tubular primaries feed directly into 2-1/2 in. (64mm) collectors, accelerating exhaust gas velocity without shifting the stock collector location. Mating surfaces feature 3/8 in. (9.5mm) laser-cut head flanges flattened under hydraulic pressure to ensure a dead-flat seal against aluminum cathedral-port cylinder heads. TIG-welded construction prevents thermal fatigue cracking under heavy load and sustained towing conditions.

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

• 2000-2006 Chevrolet Tahoe 4.8L V8
• 2000-2006 Chevrolet Tahoe 5.3L V8
• 2000-2006 Chevrolet Suburban 1500 5.3L V8
• 2000-2006 GMC Yukon 4.8L V8
• 2000-2006 GMC Yukon 5.3L V8
• 2000-2006 GMC Yukon XL 1500 5.3L V8

Frequently Asked Questions & Fitment Warnings

Does this fit the GMT800 Tahoe, Suburban, Yukon?

Yes, this is a direct bolt-on fit for the 2000-2006 Chevrolet and GMC full-size SUVs running the LR4 (4.8L) or LM7/L59 (5.3L) Vortec V8 engines; it does not fit 6.0L or 8.1L big-block platforms.

Are modifications required to retain the factory Y-pipe?

No, the 2-1/2 in. collector locations match OEM manifold geometry, bolting directly to the factory Y-pipe without cutting, welding, or ECU tuning required.

The Chevrolet, GMC Towing & Durability Standard

Engineered to handle severe duty cycles, this 304 stainless steel assembly resists oxidation under high cylinder head temperatures, ensuring maximum mid-range torque retention and leak-free performance during heavy payload and trailer hauling.