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American Thunder Cat Back Exhaust System - Flowmaster 817725 UPC: 700042032167


Flowmaster American Thunder Cat Back Exhaust System # 817725 - Dual - Dual Rear Exit - Incl. 2.5 in. Tailpipes - Super 40 Series Mufflers - 2.5 in. OEM Style Stainless Tips - 409S Stainless Steel

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Was: $1,003.69
Sale: $802.95
Save: 20%
Save: $200.74


Flowmaster American Thunder Cat Back Exhaust System 817725 Features:

  • Mandrel Bent 16ga 409 Stainless Tubing
  • Limited Lifetime Warranty
  • Aggressive And Powerful Exterior Exhaust Tone
  • Incl. Hangers and Hardware For Easy Installation
  • Axle Back System
  • Dual Rear Exit
  • Dyno Tuned for Maximum Performance
  • Premium Flowmaster Quality

Product Documents:

View the Full List of Automotive Applications »

Below is an abreviated list of applications for the American Thunder Cat Back Exhaust System.
F-150, Ford, 2016, 2015 more...


Flowmaster operates the only exhaust Research & Design facilities of its kind in the world, centered around the SuperFlow SF-7100 engine dynamometer complete with E.C.A. (engine cycle analysis) equipment and also SuperFlow chassis dyno's. Through use of these dyno's, Flowmasters engineering staff can track the complete engine cycle in millionths of a second and can obtain exact technical data of each degree of cam rotation, from induction to the tip of the exhaust system, while also showing the power numbers that really matter, the power numbers to the ground. Flowmaster also utilizes Spectrum Analyzers to fine tune the sound of each of the eleven different series of mufflers that Flowmaster currently offers, both for peak performance and just the right sound levels and tones. Flowmasters product line includes exhaust products for Performance Street, Muscle cars, Trucks, Street Rods, RV's, Motorhomes, and all types of race applications. With over 400 different muffler models, 370+ exhaust systems and numerous exhaust accessories available, Flowmaster offers you the choice of sound to fit your sound preference from wild to mild and of your specific vehicle needs. Call our experienced tech staff for live help and detailed information regarding your vehicles. With Ray still active and hands on with the R&D department in the development, not only of new exhaust products, but also with new technologies currently being tested in third and new R&D facility, the future looks to be very exciting indeed.


  • 6481445
  • 6481445
  • 700042032167
  • Flowmaster
  • New


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