Cast T4 Turbo Exhaust Manifold for Chevrolet Silverado 1500 (1999-2013) 4.8L 5.3L 6.0L 6.2L

Cast T4 Turbo Exhaust Manifold for 1999-2013 Chevrolet Silverado (GMT800 / GMT900)

What it Does: The Cast T4 Turbo Exhaust Manifold replaces the restrictive passenger-side factory manifold on 1999-2013 Chevrolet Silverado trucks to mount a T4 turbocharger high in the engine bay for forced-induction performance.

The Stock Chevrolet Silverado Exhaust Limitations

Factory exhaust manifolds on GMT800 and GMT900 trucks are strictly configured for atmospheric discharge and cannot support turbocharger integration. Meanwhile, thin-wall fabricated tubular headers are notorious for fatigue failure: sustained high exhaust gas temperatures (EGTs) and intense thermal expansion cycles induce stress cracking at welded junctions. These thermal stress fractures cause critical boost leaks, warp mounting surfaces, and ruin exhaust drive pressure.

The Engineering Solution

Constructed from thick-wall ductile cast iron, this manifold eliminates weld failure points and resists thermal cycle fatigue under sustained boost pressure. The integrated T4 flange is precision-machined flat and true to guarantee an airtight seal against the turbine housing without corrective shimming. Designed with a 2.5-inch V-band crossover port, it integrates smoothly with hot-side crossover piping to route driver-bank flow efficiently, optimizing exhaust gas velocity into the turbine wheel on Gen III/IV LS engines.

What's Included

• 1x Passenger-Side Cast T4 Turbo Exhaust Manifold

Technical Specifications

Compatibility

• 1999-2013 Chevrolet Silverado 1500 (4.8L, 5.3L, 6.0L, 6.2L LS-based Vortec V8)
• Vortec LS engine swap configurations utilizing factory truck cylinder heads

Frequently Asked Questions & Fitment Warnings

Does this fit the GMT800 and GMT900 Silverado?

Yes, this manifold is a direct bolt-on for 1999-2013 Chevrolet Silverado trucks equipped with Vortec V8 engines; it does not fit 2014+ 5.3L or 6.2L EcoTec3 models.

Are mounting hardware and manifold gaskets included?

No, mounting hardware and gaskets are not included and must be sourced separately or reused from existing factory-grade hardware.

The Chevrolet Durability Standard

Built to endure heavy hauling duty cycles and demanding boost levels, this solid cast-iron manifold delivers the structural integrity required to eliminate thermal warping and exhaust leaks under load.