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Gibson 65673 Cat-Back Dual Split Exhaust System Stainless Steel

(2014-2018 Chevrolet Silverado 1500 High Country/LTZ; 2014-2018 GMC Sierra 1500 Denali/SLT)

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

65673
10 reviews
Sale Price

$826.29

Estimated ship date Wednesday, November 18

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Product Details

The Gibson Performance Exhaust 65673 is a cat-back dual split exhaust system engineered for performance enthusiasts who demand an aggressive sound profile and real power gains. Constructed from mandrel-bent 409 stainless steel tubing (3.5-in. headpipe / 2.25-in. tailpipe), this system is built for long-term durability and corrosion resistance under demanding conditions.

Dyno-proven to deliver measurable results, this Gibson cat-back system maximizes low-end torque and horsepower in the 1,800–3,000 RPM range, producing gains of 10–15 horsepower and 15–20 lb-ft of torque by reducing backpressure and improving exhaust flow.

Gibson Superflow Muffler — Aggressive Sound, Minimal Drone:

  • Baffled and chambered muffler design with no internal packing
  • Produces a deep, aggressive exhaust note with minimal interior cabin drone
  • Muffler dimensions: 4 x 9 x 18 in. oval body
  • 3.0 in. center inlet; 2.25 in. dual outlet

Tip Specifications:

  • 4 in. polished T304 stainless steel rolled slash-cut tips
  • Clamp-on style — tip inlet: 2.25 in., outlet: 4.0 in., length: 12 in.
  • Dual tip exit straight out the back
  • Compatible with most factory bumpers, roll pans, and trailer hitches

Installation & Construction:

  • Hassle-free bolt-on installation — no welding required
  • Includes all hardware and factory-style hangers
  • 409 stainless mandrel-bent tubing for precision fitment and maximum flow
  • Note: Exhaust sound may be louder under towing conditions

Proudly made in the USA and backed by a Lifetime Limited Warranty, the Gibson 65673 cat-back exhaust delivers the performance, sound, and style serious truck owners expect.

Products specifications

Fits

2014-2018 Chevrolet Silverado 1500 High Country/LTZ; 2014-2018 GMC Sierra 1500 Denali/SLT

Tubing Diameter

3.5-in./2.25-in. Stainless mandrel bent tubing.

Muffler Dimension

4 x 9 x 18 in Oval Body; 3..0. in. Center Inlet; 2.25 in. Dual Outlet.

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 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

Exhaust Type

Cat-Back

Exit Position

Straight Out Back

Muffler Body Length

18.000 in.

Inlet Inside Diameter

3.000 in.

Tip Diameter

4.000 in.

Tail Pipe Diameter

4.000 in.

Tubing Diameter

3.00 in. / 2.25 in.

Material

Stainless Steel

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