My Account
My Garage
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order
MY GARAGE Select Vehicle
MY GARAGE

Gibson 312800 Cat-Back Single Exhaust System Aluminized with Polished Stainless Tip

(2006-2010 Hummer H3)

Part of: Gibson Performance Single Side Cat-Back Exhaust System

Other options in this family: Gibson Exhaust 619995 Gibson Exhaust 319675 Gibson Exhaust 315536 Gibson Exhaust 618815B Gibson Exhaust 315599

Manufacturer

Picture for manufacturer Gibson Exhaust

Part Number

312800
5 reviews
Sale Price

$530.84

Estimated ship date Monday, November 16

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Gibson 312800 Cat-Back Single Exhaust System is one of Gibson's most trusted performance exhaust solutions, engineered to deliver aggressive sound, improved exhaust flow, and measurable horsepower gains. Featuring a straight-back exit configuration and a polished stainless steel slash-cut tip, this system offers a clean, professional appearance with a true bolt-on installation.

The system utilizes a baffled and chambered muffler design with no internal packing material, resulting in minimal interior drone while producing a bold, aggressive exhaust note. Average horsepower gains of 5–10 hp can be expected over stock, making this an ideal upgrade for drivers seeking both performance and style without extensive modification.

Muffler Specifications:

  • Design: Baffled & Chambered — No Internal Packing
  • Shape: 6 in. Round
  • Inlet: 2.50 in. Offset
  • Outlet: 2.50 in. Offset
  • Length: 24 in.
  • Sound Character: Aggressive with Minimal Interior Drone

Tip Specifications:

  • Material: Polished T304 Stainless Steel
  • Style: Round Slash-Cut, Clamp-On
  • Inlet Diameter: 2.50 in.
  • Outlet Diameter: 3.50 in.
  • Length: 12 in.

Key Features:

  • Bolt-on installation — no cutting or welding required
  • Aluminized steel construction for corrosion resistance
  • Straight-back exhaust exit for a clean, factory-plus look
  • Polished T304 stainless slash-cut tip included
  • Average gains of 5–10 horsepower over stock
  • Backed by Gibson's Lifetime Limited Warranty

The Gibson 312800 is an excellent choice for enthusiasts seeking a reliable, performance-oriented cat-back exhaust upgrade with a hassle-free installation and long-lasting aluminized construction.

Products specifications

Fits

2006-2010 Hummer H3

Tubing Diameter

2.50-in. Aluminized 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

Material

Aluminized

Exit Position

Exit Is Straight Out The Back.

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.

Outlet Outside Diameter

2.500 in.

Muffler Body Length

24.000 in.

System Type

Cat Back

Inlet Inside Diameter

2.500 in.

Exit Position

Single Rear

Muffler Type

Chambered

Tail Pipe Diameter

2.500 in.

Exit Style

Straight

Tubing Diameter

2.500 in.

Exhaust Type

Single

I ordered a set of inner tie rods for my car from Autoplicity and found their prices to be the lowest online for the brand I was looking for. Items were ship out in 2 business days from the original manufacturer. Shipping prices were kind of on the expensive end considering the package size and weight so if Autoplicity adjust their shipping prices to be more competitive, I think their service and pricing would be hard to beat!

Wow talk about FAST shipping...I placed the order...and the door bell rang for delivery!!! The electronic points and coil when in the FJ 4o in just a few minutes and work perfectly...THANKS so much! Larry in Montana

Great pricing and quick shipping. I'll be using them again for sure.

Great prices and shipped promptly.

Easy website to shop on. Good phone support. Package will be arriving in a timely manner. All in all seems like a good company.

Share icon
Return Policy
Returns are easy at THMotorsports

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy