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 Exhaust 65637 Cat-Back Dual Extreme Exhaust System Stainless Steel

(2010-2013 Chevrolet Silverado 1500; 2010-2013 GMC Sierra 1500)

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

Other options in this family: Gibson Exhaust 9704 Gibson Exhaust 5403 Gibson Exhaust 17306-B Gibson Exhaust 5587 Gibson Exhaust 65587

Manufacturer

Picture for manufacturer Gibson Exhaust

Part Number

65637
9 reviews
Sale Price

$802.86

Estimated ship date Monday, November 23

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 65637 Cat-Back Dual Extreme Exhaust System is engineered for truck owners who demand aggressive performance and bold street presence. This complete bolt-on cat-back system exits behind the rear tires at a sharp, aggressive angle, delivering a powerful exhaust tone and significant performance gains. Dyno-tuned and tested, this system is designed to deliver average gains of 15–20 horsepower with no welding required for installation. Backed by Gibson's Lifetime Limited Warranty.

Key Features:

  • Dual exit cat-back system with aggressive rear-exit angle behind rear tires
  • Dyno-tuned for street performance — average gains of 15–20 horsepower
  • Easy bolt-on installation, no welding required
  • Baffled and chambered muffler design with no internal packing
  • Minimal interior drone with an aggressive, mean performance sound
  • Includes polished T304 stainless steel round slash-cut tip
  • Backed by a Lifetime Limited Warranty

Muffler Specifications:

  • Design: Baffled and Chambered, No Internal Packing
  • Body: 4 x 9 x 18 in. Oval
  • Inlet: 3.00 in. Center
  • Outlet: 2.25 in. Dual

Tip Specifications:

  • Material: Polished T304 Stainless Steel
  • Style: Round Slash-Cut, Clamp-On
  • Inlet: 2.25 in.
  • Outlet: 3.50 in.
  • Length: 12 in.

The Gibson 65637 Dual Extreme delivers the perfect combination of aggressive exhaust sound, polished stainless finish, and measurable performance gains — making it an ideal upgrade for truck and SUV enthusiasts seeking a true dual exhaust transformation.

Products specifications

Fits

2010-2013 Chevrolet Silverado 1500; 2010-2013 GMC Sierra 1500

Tubing Diameter

2.25-in. Stainless mandrel bent tubing.

Muffler Dimension

4 x 9 x 18 in. Oval Body; 3.00 in. Center Inlet; 2.25 in. Dual Outlet.

Muffler Description

Baffled and Chambered Muffler Design, No internal Packing, Minimal Interior Drone, Aggressive Sound

Tip Specifications

Inlet 2.25in.; Outlet 3.50in.; L-12in.

Material

Stainless

Prop 65

Yes

Tip Description

3.5in. Polished T304 Stainless. Round Slash-Cut Tip. Clamp on.

Exit Position

Exits Behind Each Rear Tire.

Outlet

Dual

Category

Truck and SUV

Muffler Body Length

18.000 in.

Tail Pipe Diameter

2.250 in.

Material

Stainless Steel

Inlet Inside Diameter

3.000 in.

Tip Diameter

3.500 in.

Exhaust Type

Cat-Back

Tubing Diameter

2.250 in.

Exit Position

Behind Rear Tire

I was very skeptical of ordering from Autoplicity, as I've never heard of them. They had everything I needed in stock and shipped very quickly, and for a much better price than my normal suppliers at Jegs and Summit Racing. I would recommend them to everyone...............Jeff

cant wait

The order was placed on a weekend (Order #30758 <br>Order Date: Saturday, September 15, 2012 Order Total: $31.73 <br>It was processed on the first business day. I couldn't ask for a quicker response.<br><br>Good joob all !!!<br>Marty Spellman

Fast shipping, product was excellent .

Very friendly customer service! They also shipped my radiator out very quickly. I will definetly be ordering from autoplicity again!

Amazing !! FAST SHIPPING and GREAT PRICES !! I couldn't ask for better !! I will definitely shop with Autoplicity again !!

Ordered Thursday, shipped Monday... guess all in all we can't be disappointed. At least they had them in stock.

I build engines for Classic muscle cars and hot rods. Presently assembling chev. SB 383 cu/in. Went shopping for a Name Brand rotating assembly that was complete and ready to install.Shopped several other sites before finding "Autoplicity" Prices were GREAT (best I could find Anywhere), Shipping Very prompt, Shpg. charges Very reeasonable,I will Defenitely use them again!!!

Good prices. Good communication.

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