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Gibson 65648 Cat-Back Dual Split Exhaust System Stainless Steel

(2011-2019 Chevrolet Silverado 2500 HD; 2011-2019 Chevrolet Silverado 3500 HD; 2011-2019 GMC Sierra 2500 HD; 2011-2019 GMC Sierra 3500 HD)

Part of: Gibson Performance Exhaust Dual Split Cat-Back Exhaust System

Other options in this family: Gibson Exhaust 700001 Gibson Exhaust 312700 Gibson Exhaust 17303-B Gibson Exhaust 9508 Gibson Exhaust 66568

Manufacturer

Picture for manufacturer Gibson Exhaust

Part Number

65648
12 reviews
Sale Price

$945.47

Estimated ship date Tuesday, November 17

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Product Details

The Gibson 65648 Cat-Back Dual Split Exhaust System is engineered for enthusiasts who demand an aggressive throaty exhaust note and a bold dual-tip look. By reducing backpressure throughout the exhaust path, this system delivers meaningful performance gains — with typical horsepower improvements averaging 15–20 HP along with increased torque.

Constructed from polished T304 stainless steel, this cat-back system features a straight-back dual tip exit designed to work with most factory bumpers, roll pans, and trailer hitches. Installation is a straightforward bolt-on process — no welding or cutting required — making it an accessible upgrade for home mechanics and professionals alike. The system is backed by a Lifetime Limited Warranty.

Muffler Specifications:

  • Design: Baffled and chambered muffler — no internal packing
  • Sound Profile: Aggressive tone with minimal interior drone
  • Body: 8 in. round
  • Inlet: 3.50 in. center inlet
  • Outlet: 3.00 in. dual outlet
  • Length: 24 in.

Tip Specifications:

  • Style: Round slash-cut, polished T304 stainless steel
  • Tip Inlet: 3 in.
  • Tip Outlet: 4 in.
  • Tip Length: 12 in.
  • Attachment: Clamp-on

Key Features:

  • Dual split cat-back configuration with stainless steel construction
  • Reduces exhaust backpressure for improved performance
  • Bolt-on installation — no welding required
  • Compatible with most bumpers, roll pans, and trailer hitches
  • Note: Exhaust sound increases under towing conditions
  • Backed by Gibson's Lifetime Limited Warranty

Products specifications

Fits

2011-2019 Chevrolet Silverado 2500 HD; 2011-2019 Chevrolet Silverado 3500 HD; 2011-2019 GMC Sierra 2500 HD; 2011-2019 GMC Sierra 3500 HD

Tubing Diameter

3-in. Stainless mandrel bent tubing.

Muffler Dimension

8 in. Round Body; 3.50 in. Center Inlet; 3.00 in. Dual 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

Prop 65

Yes

Tip Description

4in. Polished T304 Stainless. Round Slash-Cut Tip. Clamp on.

Tip Specifications

Inlet 3 in.; Outlet 4 in.; L-12 in.

Outlet

Dual

Category

Truck and SUV

Tip Diameter

4.000 in.

Exhaust Type

Cat-Back

Inlet Inside Diameter

3.500 in.

Material

Stainless Steel

Exit Position

Straight Out Back

Muffler Body Length

24.000 in.

Tubing Diameter

3.000 in.

Tail Pipe Diameter

4.000 in.

Would Buy From Company Again

Fast, easy checkout!

The only recommendation I have is to include the position in the description for brake pads. I had to check another site to verify front vs. rear pads. It's not a major issue, especially because you have some of the best prices on these pads.

Best price I could find on the net and super fast shipping.

Easy lookup and like style of shock listing

the delivery times are very very long but the price is right.

Autoplicity has an abundance of name brand parts at unbeatable prices. Customer service was also great to deal with. Receipt and tracking info was provided promptly.

Simple and easy, more companies should work this way.

Competitive prices. Quick check out

First time shopper: Excellent service and value.

Product was a good price, fast shipping and great costumer service! will do business again!

very easy to find parts and great price

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