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Gibson Exhaust 66566 Cat-Back Dual Extreme Exhaust System Stainless Steel

(2011-2018 Ram 1500; 2009-2010 Dodge Ram 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

66566
10 reviews
Sale Price

$801.96

Estimated ship date Tuesday, November 17

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Product Details

The Gibson 66566 Cat-Back Dual Extreme Exhaust System delivers an aggressive dual-exit configuration that exits behind the rear tires at a bold angle, combining street-ready looks with real, dyno-tuned performance gains. Built from polished T304 stainless steel with mandrel-bent 2.25-inch tubing, this bolt-on system is engineered for truck enthusiasts who demand both sound and power without compromise. Average horsepower gains of 15–20 hp are typical, backed by Gibson's Lifetime Limited Warranty.

Muffler Specifications:

  • Design: Baffled & Chambered — no internal packing
  • Sound Profile: Aggressive performance tone with minimal interior drone
  • Body Dimensions: 4 in. x 9 in. x 18 in. oval body
  • Inlet: 3.00 in. center inlet
  • Outlet: 2.25 in. dual outlet

Exhaust Tip Specifications:

  • Style: 4 in. round slash-cut tip
  • Material: Polished T304 stainless steel
  • Attachment: Clamp-on
  • Tip Inlet: 2.25 in.
  • Tip Outlet: 4 in.
  • Tip Length: 12 in.

System Features:

  • 2.25 in. mandrel-bent T304 stainless steel tubing
  • 100% bolt-on installation — no welding or cutting required
  • Dual behind-the-tire exit for aggressive stance and sound
  • Dyno-tuned and tested for street performance
  • Backed by Gibson's Lifetime Limited Warranty
  • UPC: 677418023442

The Gibson 66566 is the stainless steel version of the Dual Extreme cat-back series, offering long-lasting corrosion resistance and a polished finish that complements any truck build. Straightforward clamp-on assembly makes this a weekend-ready upgrade with professional-grade results.

Products specifications

Fits

2011-2018 Ram 1500; 2009-2010 Dodge Ram 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

Material

Stainless

Prop 65

Yes

Exit Position

Exits Behind Each Rear Tire.

Tip Description

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

Outlet

Dual

Tip Specifications

Inlet 2.25 in.; Outlet 4 in.; L-12 in.

Category

Truck and SUV

Inlet Inside Diameter

3.000 in.

Tail Pipe Diameter

4.000 in.

Muffler Body Length

18.000 in.

Tip Diameter

4.000 in.

Exit Position

Behind Rear Tire

Exhaust Type

Cat-Back

Material

Stainless Steel

Tubing Diameter

2.250 in.

Very quick easy transaction. Recommend to anyone looking for auto accessories.

Best price on the internet. A lot cheaper than amazon, so I was pretty surprised.

Wow. Great Price and extremely fast shipping. I had a CS question and they replied promptly and satisfactorily. I will definitely buy from Autoplicity again.

Good site price reasonable

Autoplicity was very helpfull in finding the right part for my vehical. I got my order in 2 days and all was in good shape. They had the best price by several dollars on my part. I will be doing business with them in the future.

No issues at this time with transaction.

Autoplicity had the best price availiable for the product I purchaced. They beat all other competititor's prices!

Well, I'll start with saying this...I wanted a specific product from COBB tuning that they sell. It was priced lower than any other company so I bought it. This happened on the 22nd, I ended up calling them almost a week later to request tracking info. They were very friendly when they notified me it wouldn't be able to ship out till the 3rd of feb. For a 2 lb item I thought this was pretty slow. They apologized for COBB holding the order up. Its now the 7th, should get my item today!! Overall its a good company with friendly employees, Shipping time is lacking but a trade off for the lowest price. I would refer a friend for price and also mention shipping time expectations. I do believe there's something to be said for quality customer service and low prices...It's becoming harder and harder to find companies that posses such qualities. Honestly, if they had a faster shipping method I would give them a perfect rating.<br>

** Update 4/18/2012<br>Everything arrived in several different shipments. I did experience a problem with some FelPro Headbolts that I had ordered. I ordered two and only received one, but after a short phone call with Paul from shipping, the problem was fixed and my second set of bolts were shipped.<br><br>They had the cheapest price that I could find on several products. I did not like the order confirmations on there website as I had to copy and paste to search for my tracking number. I am supposed to receive my order today and I am scared because the two weights do not match up. Autoplicity says 37.7 pounds and fedex says 3.8 pounds. Maybe there is more than one tracking number and I just do not know.

Excellent price on name brand items, best prices for Bosch oxygen sensors.

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