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Flowmaster Exhaust Systems Cat Back Exhaust - American Thunder Series - 817435

  • $136.95 - $2,266.95  List Price
  • $749.95
  • What Do You Drive?


  • Style:
    Dual Rear or Side Exit (409 Stainless)
  • Material:
    With Dual Exhaust Tips
  • Part #:
  • Main piping diameter: 2.5"
  • Super 50 Series Muffler
  • Includes dual 3" exhaust tips
  • Includes exit pipes for dual rear or dual side exit
  • Download installation instructions (PDF)

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Flowmaster Exhaust Systems Part #817435 Customer Reviews

Average Rating

5 Customer Reviews

Good for the price

Reviewed by Hollitte G (GARRETT, IN) Reviewed for a 1999 Chevy Silverado — Feb 20, 2016 12:37 PM

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It doesn't have the sound I was expecting. I have the same system on my 2015 Ram and it sounds awesome, not much difference on the Chevy. FYI - the installation directions and pictures suck! Both pipes go between the differential and the shock and the hangers go on the inside of the frame. Also, if you have a hitch use the rear exit and they will mount inside the hitch frame.

Bad System For A 1999 Chev. Silverado Reg. Cab Short Bed

Reviewed by Dean S (MERIDEN, CT) Reviewed for a 1999 Chevy Silverado — Sep 10, 2015 10:00 AM

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I installed the system the right side fits fine but the left side is a nightmare.The first pipe you have to cut the hanger off. can not install pipe unless you do.The second pipe is too long. You have to cut 3/4 of a inch off pipe right tight against the spare tire.You have to ajust pipe between spare tire and differential about a 1/4 inch on each side.Pulled tire back as far as it will go.Lousy engineering FLOWMASTER.

Better than expected

Reviewed by alan k (WAUCONDA, IL) Reviewed for a 2017 Toyota RAV4 — Aug 31, 2014 11:48 AM

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I have a friend who has his own auto repair shop and he offered it's use, made everything easier. Once the truck was up on the rack, layout all the parts was next, checked to the instructions and off we were. Never had to look at the instructions again. Everything fit, no leftover parts, lowered the truck, started the truck and had a big smile on the face!!!! Total time 1 1/2 hours including clean-up. Having the use of the lift was the key, made it so easy to remote (cut) the old system.

I love it!

Reviewed by Devan G (LITTLE ELM, TX) Reviewed for a 1999 Chevy Silverado — Jul 23, 2013 8:56 AM

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2 of 2 people found the following review helpful.

Just some advice, get someone to install it for you and see if they can weld it too.

Sounds Great

Reviewed by Max O (Jay, FL) Reviewed for a 2004 GMC Sierra — Aug 15, 2011 9:29 PM

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Awesome sound at startup and when you get on it. Only a little bit of drone at crusing speed so its not obtrusive. The dual chrome tips look awesome going straight out the back. Only small disappointment was that the wire hanger on the left over axle pipe did appear to be welded on somewhat wrong and required some bending of it and the mating hanger on the frame to make enough clearance for the rubber piece to fit between.