SKU: 13707253671

Flowmaster 817628 Force II Cat Back System

Sale price$488.25 Regular price$542.50
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Ships within 48 hours · Estimated delivery Aug 17 - Aug 22

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Description

Flowmaster 817628 Force II Cat Back SystemFlowmaster introduces our Force II stainless steel cat back exhaust systems for the 2011 2021 Jeep Grand Cherokees with the 3. 6 and 5. 7 liter engines. These systems use a Super 50 series muffler for a moderate to mild sound level and increased performance. Tuned resonators help keep the interior sound level low for a comfortable ride. Mandrel bent 409 stainless steel tubing allows for maximum exhaust flow and durability. The systems use larger 4. 00

Flowmaster introduces our Force II stainless steel cat-back exhaust systems for the 2011-2021 Jeep Grand Cherokees with the 3.6 and 5.7-liter engines. These systems use a Super 50 series muffler for a moderate to mild sound level and increased performance. Tuned resonators help keep the interior sound level low for a comfortable ride. Mandrel bent 409 stainless steel tubing allows for maximum exhaust flow and durability. The systems use larger 4.00-inch polished stainless steel tips for a custom look. Max dyno gains of 11 hp and 15 lb-ft at the rear wheels with the 817628 kit. 817575 is a dual exit system that fits both 3.6 and 5.7-liter models with dual bumper cutouts. 817628 is a single exit system for 3.6-liter models only with a single bumper cutout. All of the necessary hardware is included, and factory-mounting locations are used for an easy installation. Backed by Flowmaster's Lifetime Limited Warranty.

Shipping Notes
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 13707253671

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4.8 ★★★★★
Based on 11 reviews
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Verified Purchase
David
Belleville, US
★★★★★ 5
Worth it!
Size: 50 sqft
I was worried it wouldn't work as well since it's 50 mil and I thought I got the wrong thing. Nope! Works great. Did all four doors on my 93 civic and I have enough for the floor I think. Solid price. Noise reduced by about 5 decibels hive difference. Very sticky and easy to apply I'm so happy I was able to cover most all of my car. If I need more, definitely buying this since I got so much extra and I thought I would. PS: that five decibel thing is only with the four doors. My firewall is next and then my floor, but it's such a huge difference
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Reviewed in the United States on April 2, 2026
T
Verified Purchase
Teresa A. Patterson
Houston, US
★★★★★ 5
Quiet your vehicle noises
Size: 50 sqft
Put this in our high roof van and couldn’t believe how much quieter it was at once. Really cut down on the vibration noise Nice and easy to install just peel n stick. Was also easy to cut with scissors for smaller areas. Seemed to be really nice quality. Didn’t notice any odor.
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Reviewed in the United States on June 9, 2026
S
Verified Purchase
Stephanie
Bozeman, US
★★★★★ 5
Sound deadening the Hot Rod
Size: 20 sqft, Size: 20 sqft
Works well, good value for the money. It’s very sticky and conforms to what you are applying it to. One 20 sq ft box did approximately the passenger side
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Reviewed in the United States on April 3, 2026
M
Verified Purchase
M. Del
Phoenix, US
★★★★★ 5
Good stuff
Size: 50 sqft, Size: 50 sqft
Good stuff. I did a lot of work on my 91 Toyota Land Cruiser 3FE. I did the inside and outside doors, as well as the under-hood area, with some extra work. I like this stuff. It sticks down good but you have to clean your surface so there's a good grip. I think these are going to do well for noise cancellation. The deadening material does well with absorbing vibrations too. But the install roller tools it will come in handy. Trust me trying to do it by hand is not worth it.
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Reviewed in the United States on June 6, 2026
C
Verified Purchase
Charlie J
Draper, US
★★★★★ 4
Good quality
Size: 10 sqft
I wish it was a little better but it definitely works great and look good for how cheap it is
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Reviewed in the United States on January 23, 2026

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