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 Performance Exhaust 65664 Dual Split Cat-Back Exhaust System Stainless

(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

65664
10 reviews
Sale Price

$830.41

Estimated ship date Wednesday, November 18

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 Performance Exhaust 65664 is a cat-back dual split exhaust system built for drivers who demand a deep, aggressive exhaust note combined with real, dyno-proven power gains. Engineered with a split rear exit design, this system delivers dual exhaust style while maintaining compatibility with most factory bumpers, roll pans, and trailer hitches.

Performance:

  • Dyno-proven to maximize low-end torque and horsepower in the 1,800–3,000 RPM range
  • Average gains of 10–15 horsepower and 15–20 lb-ft of torque
  • Reduces exhaust backpressure for improved engine efficiency
  • Note: Exhaust sound level may increase under towing conditions

Gibson Superflow Muffler:

  • Baffled and chambered internal design — no internal packing
  • Produces a deep, aggressive exhaust tone with minimal interior drone
  • Oval body measuring 4 x 9 x 18 in. with 3.0 in. center inlet and 2.25 in. dual outlet

Construction & Materials:

  • 3.5 in. / 2.25 in. 409 stainless steel mandrel-bent tubing for maximum flow and long-term durability
  • Exits straight out the back of the vehicle
  • Includes two 4 in. polished T304 stainless rolled slash-cut tips (clamp-on, 2.25 in. inlet / 4.0 in. outlet / 12 in. length)

Installation & Warranty:

  • Complete bolt-on installation — no welding required
  • Includes all hardware and factory-style hangers for a clean, professional fit
  • Made in the USA
  • Backed by a Gibson Lifetime Limited Warranty
  • UPC: 677418027068

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

Tubing Diameter

3.00 in. / 2.25 in.

Material

Stainless Steel

Exit Position

Straight Out Back

Exhaust Type

Cat-Back

Tail Pipe Diameter

4.000 in.

Muffler Body Length

24.000 in.

Inlet Inside Diameter

3.000 in.

Tip Diameter

4.000 in.

Great service

Easy interface

Very quick and very simple! Thank you!

Found what I needed at a great price.

excellent

This was my first purchase on Autoplicity, it has been great will definitely put it in my favorites.

Shipping for a 2 ounce part was over the top expensive.

Great prices & fast shipping.

good?

great ordering process. Just waiting for product to arrive.

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