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Gibson 5661 Cat-Back Dual Split Exhaust System Aluminized

(2014-2018 Chevrolet Silverado 1500; 2014-2018 GMC Sierra 1500)

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

5661
10 reviews
Sale Price

$769.82

Estimated ship date Wednesday, November 18

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Product Details

The Gibson Performance Exhaust 5661 is an aluminized cat-back dual split exhaust system engineered to deliver an aggressive exhaust tone alongside real, measurable performance gains. Featuring a rear-exit design with dual stainless steel slash-cut tips, this system provides a bold, dual-exhaust look that exits straight out the back and is compatible with most factory bumpers, roll pans, and trailer hitches.

Gibson's proprietary SuperFlow™ muffler uses a baffled and chambered design with no internal packing, producing an aggressive exhaust note with minimal interior drone — so you get the sound without the cabin fatigue. Exhaust volume increases naturally under towing loads, giving you audible feedback when working the engine hard.

Key Features:

  • Cat-back dual split rear-exit design — exits straight out the back
  • 3.00" / 2.25" aluminized mandrel-bent tubing for unrestricted exhaust flow
  • SuperFlow™ baffled and chambered muffler — no internal packing, minimal interior drone
  • Muffler: 8" round body, 3" offset inlet, 2.25" dual outlet, 24" body length
  • 4" polished T304 stainless steel rolled slash-cut tips (clamp-on style)
  • Tip specs: 2.25" inlet / 4.0" outlet / 12" length
  • Reduces backpressure for average gains of 18–20 horsepower
  • Compatible with most bumpers, roll pans, and trailer hitches
  • Includes all hardware and factory-style hangers for easy bolt-on installation
  • No cutting or welding required
  • Backed by a Lifetime Limited Warranty

The Gibson 5661 ships as a complete kit with everything needed for a straightforward bolt-on installation. Whether you're looking for improved throttle response, a deeper exhaust sound, or a cleaner dual-tip appearance, this aluminized cat-back system delivers on all fronts.

Products specifications

Fits

2014-2018 Chevrolet Silverado 1500; 2014-2018 GMC Sierra 1500

Tubing Diameter

3-in./2.25-in.Aluminized mandrel bent tubing.

Muffler Dimension

8 in. Round Body; 3 in. Offset Intlet;2.25 in. Dual 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.

Prop 65

Yes

Tip Description

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

Tip Specifications

Inlet 2.25 in.; Outlet 4.0 in.; L-12 in.

Outlet

Dual

Category

Truck and SUV

Exit Style

Straight

Exit Position

Dual Split Rear

Exhaust Type

Dual

Tip Diameter

4.000 in.

Tail Pipe Diameter

2.250 in.

Muffler Body Length

24.000 in.

Tubing Diameter

3.000 in.

Inlet Inside Diameter

3/2.25

Tip Logo

None

Muffler Type

Chambered

Outlet Outside Diameter

4.000 in.

System Type

Cat Back

Good

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