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Flowmaster American Thunder Cat-Back Exhaust System

MODEL # FLM817674


2 Reviews
4 out of 5 Stars
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
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3 of 4 people found the following review helpful
Superb Fit / Great Sound 2 years ago
5out of 5stars
2016 Crystal HDMC
Easy bolt in Installation with superb fitment. Everything tucks up nice and tight providing extra ground clearance in the rear. In a steep drop off, my rear bumper will hit before this exhaust does. Sound is nice. On acceleration, you can hear it, and at cruising speeds its just slightly louder than stock. No real bothersome interior noise at highway speeds. Very High Quality part, as to be expected from Flowmaster.
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3 of 3 people found the following review helpful
Great Clearance, Terrible Sound 2 years ago
3out of 5stars
Jay S.
I mostly bought this because I was tired of banging my stock muffler up on my JKU. It's a great kit for getting high clearance. Pretty easy to put together. The issue is the Flowmaster HP-2 that comes with it. Everyone has different taste, and this wasn't mine. If you want your Jeep to sound like a street racer, go for it. The HP-2 sounds decent at lower RPM (1k-1.5k). Once you go over 2k that's where the terrible sounds happen. I felt embarrassed driving my Jeep around town. Doing some research I found the Vibrant 1141 resonator. I modified my new exhaust to accept the Vibrant in front of the HP-2, pushing the HP-2 a bit towards the rear, next to the evap skid (there was room on the 4 door for this mod). Now it sounds great. Low grumble on idle, a bit louder than stock, but not obnoxious like it was before. I wish I did this mod before installing the kit, cause once you clamp things down, it's very difficult to take apart to put the Vibrant in.
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