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Gibson Exhaust 65665 Dual Extreme Cat-Back Exhaust System with Polished Stainless Tips

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

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

Other options in this family: Gibson Exhaust 9704 Gibson Exhaust 5403 Gibson Exhaust 5587 Gibson Exhaust 5572 Gibson Exhaust 65587

Manufacturer

Picture for manufacturer Gibson Exhaust

Part Number

65665
14 reviews
Sale Price

$829.81

Estimated ship date Sunday, November 15

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Product Details

The Gibson Performance Exhaust 65665 Dual Extreme Cat-Back Exhaust System is engineered for truck enthusiasts who demand maximum performance and an aggressive exhaust note. This complete bolt-on system installs entirely behind the rear tires at a bold, angled exit that turns heads on and off the road.

Dyno-tuned and tested for real-world street performance, this system delivers average gains of 15–20 horsepower over the stock exhaust. The Gibson performance muffler produces a deep, aggressive exhaust tone, while the polished stainless steel tips add a premium, high-visibility finish to complement any truck build.

Key Features:

  • Dual exit cat-back design positioned behind the rear tires for an aggressive stance
  • Dyno-tuned for average gains of 15–20 horsepower
  • Gibson performance muffler with a deep, powerful exhaust sound
  • Polished stainless steel exhaust tips for a premium appearance
  • 100% bolt-on installation — no welding required
  • Backed by Gibson's Lifetime Limited Warranty

The Gibson 65665 Dual Extreme system is a straightforward upgrade that combines show-quality looks with genuine performance improvements, making it an ideal choice for truck owners who want both street presence and proven power gains.

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

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

Stainless

Prop 65

Yes

Tip Description

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

Exit Position

Exits Behind Each Rear Tire.

Tip Specifications

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

Outlet

Dual

Category

Truck and SUV

Tubing Diameter

3.00 in. / 2.25 in.

Tip Diameter

4.000 in.

Tail Pipe Diameter

4.000 in.

Inlet Inside Diameter

3.000 in.

Exit Position

Front of Rear Tire

Muffler Body Length

24.000 in.

Exhaust Type

Cat-Back

Material

Stainless Steel

Great easy to work with

Quick, easy, and had exactly what i needed when i needed it!

excellent

Great price. Easy website to use.

great price!!

I wanted to order a couple of difficult to find accessories for my new Jeep Wrangler. Autoplicity not only had the items I was looking for, but had them at a very reasonable price. The two items were shipped separately but arrived in short order. Thanks to Autoplicity for filling my order #7860 of 3/26/12 quickly and accurately. See you again soon.

very fast and easy.

The ordering process was simple and user friendly. The pricing was the lowest I could find for a brand new AMP Powerstep for my Ford F150. The tracking number was provided and the item is scheduled for FedEx ground delivery in 3-days.

I like how fast they ship and they have great prices. I will shop Autoplicity again. Thanks Guys

Easy enough until it came to payment. "Check out with Amazon, it'll be faster." It wasn't.

Shopping was easy, and everything was easy to find.

I will use this site for all my "hard to find" car parts!!!!

They had all the parts that i needed and shipped very fast had them in two days after ordered will buy again from autoplicity.

Easy and fast. Order arrived very fast. Thanks.

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