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Gibson 612800 Cat-Back Single Exhaust System Stainless Steel

(2006-2010 Hummer H3)

Manufacturer

Part Number

612800
Sale Price

$689.48

Estimated ship date Wednesday, November 18

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Product Details

The Gibson 612800 Cat-Back Single Exhaust System is a bolt-on performance upgrade engineered and dyno-tested to deliver real, measurable gains. Constructed from 409 stainless steel mandrel-bent tubing, this single-exit system routes exhaust straight out the back for a clean, factory-finished look with serious performance credentials.

At the heart of the system is the Gibson SuperFlow Muffler — a fully welded, baffled and chambered design with no internal packing to blow out. This construction delivers minimal interior drone while producing an aggressive exterior exhaust note. Dyno testing confirms average gains of 10–15 horsepower and 15–20 lb-ft of torque, concentrated in the critical low-end RPM range of 1,800 to 3,000 RPM where acceleration, towing, and passing power matter most.

Key Features:

  • Muffler Design: Baffled and chambered SuperFlow muffler — no internal packing, minimal interior drone, aggressive exterior sound
  • Muffler Dimensions: 6 in. round body; 2.50 in. offset inlet; 2.50 in. offset outlet; 24 in. length
  • Tubing: 2.50 in. diameter, 409 stainless steel mandrel-bent for unrestricted exhaust flow
  • Exhaust Tip: 3.50 in. polished T304 stainless steel round slash-cut tip — clamp-on style
  • Tip Specifications: 2.50 in. inlet; 3.50 in. outlet; 12 in. length
  • Exit Style: Single rear exit — straight out the back
  • Installation: Hassle-free bolt-on fitment using factory hangers and clamps — no welding required
  • Warranty: Backed by Gibson's Lifetime Limited Warranty
  • Origin: Proudly made in the USA

Everything needed for a clean, professional installation is included right out of the box. The Gibson 612800 is an ideal solution for drivers seeking a noticeable improvement in performance and sound without sacrificing daily drivability.

Products specifications

Fits

2006-2010 Hummer H3

Tubing Diameter

2.50-in. Stainless mandrel bent tubing.

Muffler Dimension

6 in. Round; 2.50 in. Offset Inlet; 2.50 in. Offset Outlet; L-24 in.

Muffler Description

Baffled and Chambered Muffler Design, No internal Packing, Minimal Interior Drone, Aggressive Sound

Exit Position

Exit Is Straight Out The Back.

Material

Stainless

Tip Specifications

Inlet 2.50in.; Outlet 3.50in.; L-12in.

Prop 65

Yes

Tip Description

3.5in. Polished T304 Stainless. Round Slash-Cut Tip. Clamp on.

Outlet

Single

Category

Truck and SUV

Tip Diameter

3.500 in.

Material

Stainless Steel

Exit Position

Straight Out Back

Inlet Inside Diameter

2.500 in.

Tubing Diameter

2.500 in.

Tail Pipe Diameter

2.500 in.

Muffler Body Length

24.000 in.

Exhaust Type

Cat-Back

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