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Flowmaster 817637 - American Thunder Cat Back Exhaust System

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$664.95

$738.95

You save: $74.00 (10%) off MSRP

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Check to see if this fits your vehicle

This part fits

  1. 2018 Ford Focus ST 2.0L L4 cid:122 cc:1999
  2. 2017 Ford Focus ST 2.0L L4 cid:122 cc:1999
  3. 2016 Ford Focus ST 2.0L L4 cid:122 cc:1999
  4. 2015 Ford Focus ST 2.0L L4 cid:122 cc:1999
  5. 2014 Ford Focus ST 2.0L L4 cid:122 cc:1999
  6. 2013 Ford Focus ST 2.0L L4 cid:122 cc:1999
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About this product

Part #: 817637

Flowmaster's American Thunder cat-back exhaust system for the 2013-2018 Ford Focus ST hatchback is perfect for the person looking for moderate to aggressive sound levels with all of the performance benefits that you would expect from Flowmaster. This bolt on DOR (Dual Out Rear) emissions legal system for the 2.0L L4 turbocharged engine features a specially tuned muffler and resonator, 2.25 inch mandrel bent stainless steel tubing, and 3.25 x 3.75 inch oval polished stainless steel tips. The exhaust system is covered by Flowmaster's Lifetime Limited Warranty. Designed for an easy fit, this system includes all necessary parts and hardware for installation.

More Details

Exhaust TypeSingle
Exit PositionDual Rear
Exit StyleStraight
Heat Shield AttachedNo
Inlet Diameter2.250 in.
Inlet Inside Diameter2.250 in.
MaterialStainless Steel
Muffler Count1
Muffler Part NumberKit Only
Muffler SeriesTuned Resonator
Outlet Diameter2.500 in.
Outlet Outside Diameter2.250 in.
Single or DualSingle
Sound LevelModerate/Aggressive
System TypeCat Back
Tail Pipe Diameter2.250 in.
Tip Diameter3.250 in. x 3.750 in.
Tip Length7.000 in.
Tip Quantity2
TitleFlowmaster 817637 Cat-back - Dual Rear Exit - American Thunder - Mod/Agg Sound
Tubing Diameter2.250 in.
Additional Documents
  1. Certificate of Originpdf
  2. Installation Instructionspdf
  3. Warrantypdf

See what our community says about flowmaster products

Johnathan Hirt

15

Johnathan Hirt
2015 Dodge Dart
product page reviews icon 0product page reviews icon 1product page reviews icon 2product page reviews icon 3product page reviews icon 4
What made you choose this particular product?
Price
What were you trying to accomplish by adding this product?
Better sound
Once you’ve had a chance to use the product, did it meet your expectations?
Good for the price
View on Johnathan's build
Trace Butcher

595

Trace Butcher
1979 Ford F-150
product page reviews icon 0product page reviews icon 1product page reviews icon 2product page reviews icon 3product page reviews icon 4
What made you choose this particular product?
Performance
What were you trying to accomplish by adding this product?
Sound
View on Trace's build
Christian Larsen

23

Christian Larsen
2015 Ford Mustang
product page reviews icon 0product page reviews icon 1product page reviews icon 2product page reviews icon 3product page reviews icon 4
Once you’ve had a chance to use the product, did it meet your expectations?
It sounds good, but drones a lot when on the highway.
Any additional comments?
Probably going to run a Borla Stinger S-Type soon.
View on Christian's build
product page reviews icon 0product page reviews icon 1product page reviews icon 2product page reviews icon 3product page reviews icon 4
What made you choose this particular product?
Morr aggressive sound
What were you trying to accomplish by adding this product?
Improved exhaust note
Was it easy install? Any installation tips that will help others?
Professionally installed
Once you’ve had a chance to use the product, did it meet your expectations?
Yes
View on Deandre's build
product page reviews icon 0product page reviews icon 1product page reviews icon 2product page reviews icon 3product page reviews icon 4
What made you choose this particular product?
Reviews online and sound from YouTube videos
What were you trying to accomplish by adding this product?
Better exhaust note
Was it easy install? Any installation tips that will help others?
Took a couple hours to get everything mocked up, welded and hung. Overall an easy install. Did everything at home
Once you’ve had a chance to use the product, did it meet your expectations?
Awesome sound, very deep and not too loud
View on Josh's build
California prop 65 warningWARNING: Cancer and Reproductive Harm www.p65warnings.cs.gov

*Some manufacturer restrictions apply.

About Flowmaster

Manufacturer of performance exhaust systems, mufflers, cold air intakes, turbo boost modules, catalytic converters, race mufflers, headers and numerous exhaust accessories for late model cars, trucks, off-road, Jeeps, SUV’s, classic muscle cars, powersports vehicles and more. Flowmaster® gives you lots of exhaust choices with 12 designs of chambered mufflers, 3 styles of our exclusive “laminar-flow” mufflers and a new line of FlowFX “straight-through” performance mufflers, along with 5 sound categories of exhaust systems, giving you the customer, the power to custom tailor the sound of your vehicle whether you prefer mild, moderate or aggressive tones and sound levels.

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