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SKU: 315599 | UPC: 677418018240
Gibson 2006-2009 Chevrolet Trailblazer LT & GMC Envoy 4.2L 2.5in Cat-Back Single Exhaust - Aluminized
Gibson 315599 cat-back exhaust system upgrades 2006-2009 Chevrolet Trailblazer LT 4.2L and compatible models with 2.5-inch mandrel-bent aluminized steel tubing and single exit behind the rear tire. This setup boosts acceleration, hill climbing, towing, and passing power through dyno-proven low-end torque and horsepower from 1800 to 3000 RPM. Expect average gains of 10-15 horsepower and 15-20 lb-ft of torque while keeping the cab quieter than stock.
Key Features
- Performance Gains: Dyno tests confirm 10-15 HP and 15-20 lb-ft torque increases focused on low RPM range for real-world driving power.
- Single Side Exit: Positions outlet behind rear tire for balanced flow and aggressive sound without drone inside the vehicle.
- Quiet Cabin Operation: Engineered for minimum interior noise compared to other exhaust options while enhancing throttle response.
- Bolt-On Design: Direct fit installation uses factory hangers with no welding or cutting required for hassle-free setup.
- Durable Construction: 2.5-inch aluminized steel tubing paired with stainless steel GPX muffler for corrosion resistance and longevity.
Product Notes
- Designed exclusively for 4.2L inline-6 engines on listed fitments.
- Polished stainless steel tip adds clean finish to the single rear exit.
- Ships fully assembled in protective packaging to prevent damage.
Installation Notes
- Professional installation recommended.
- Bolts directly to factory catalytic converter and mid-pipe using provided hardware.
- Compatible with OEM hangers. torque clamps to specifications for secure fit.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2008 | Chevrolet | Trailblazer | Base |
| 2006-2007 | Chevrolet | Trailblazer | LS |
| 2006-2009 | Chevrolet | Trailblazer | LT |
| 2006-2009 | GMC | Envoy | SLE |
| 2006-2009 | GMC | Envoy | SLT |
Why Choose Gibson?
- American-made with dyno testing on every system for verified gains.
- Lifetime Limited Warranty covers defects in materials and workmanship.
- Precision mandrel bends ensure smooth exhaust flow without restrictions.
Frequently Asked Questions
-
Q: Does this fit 2006-2009 Trailblazer LT with 4.2L engine?
A: Yes, Gibson 315599 installs directly on 2006-2009 Chevrolet Trailblazer LT 4.2L and listed submodels including GMC Envoy SLE and SLT equivalents. -
Q: What material is used in this exhaust?
A: 2.5-inch aluminized steel tubing for the pipes with stainless steel muffler internals and polished tip for durability and shine. -
Q: What warranty applies and is welding needed?
A: Backed by Gibson Lifetime Limited Warranty. No welding required. full bolt-on with all hardware included.
Shipping & Handling
- Method: Standard ground shipping
- Availability: In stock - ships same or next business day
- Packaging: Single oversized box measuring 48in L x 14in W x 14in H
- Weight: 48 lbs
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