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Flowmaster American Thunder 3in Exhaust System w/ X-Pipe (87-93 LX, 86 GT)

Item #:18411
Manufacturer Info:Flowmaster 17389
Market Price:$799.99 - You Save 10% ($80.00)
Our price:$719.99
Availability:Usually ships the same business day.
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Flowmaster American Thunder 3in Exhaust System w/ X-Pipe (87-93 LX, 86 GT) - Flowmaster 17389
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Product Features
Quick Facts
  • Aggressive Flowmaster sound.
  • Super 40 Series Mufflers.
  • 3.0" Polished stainless steel tips.
  • Mandrel Bent Off-road X-pipe.
  • Durable Aluminized Steel Construction.
  • Fits 1987-1993 LX and 1986 GT Mustangs.
Prepare your 5.0 Pony for the track with a Flowmaster American Thunder 3 inch Exhaust System with Off-road X-Pipe from AmericanMuscle.
Product Description

Flowmaster Sound. The Flowmaster American Thunder Exhaust System will improve your 1987-1993 LX or 1986 GT Mustangs exhaust flow for an increase in horsepower and sound. This system features 3" mandrel bent free flow tubing, an off-road X-pipe and Flowmasters Super 40 Series Mufflers for a deeper throatier muscle car exhaust note.

Quality Construction. Constructed from mandrel bent 3.0" 16 gauge aluminized steel tubing for it's corrosion resistant properties the Flowmaster American Thunder Kit features Super 40 Series chambered mufflers with 3.0 " diameter OEM style polished stainless steel tips for muscle car looks and sound. And as an added bonus the tips are embossed with the "Flowmaster" logo for true custom styling.

Fitment. This Flowmaster American Thunder Exhaust System is designed to fit the 1987-1993 LX and the 1986 GT Mustangs from the manifolds (shorty headers) back. This Kit is intended for off road use only.

Catback Exhaust Specifications
Piping Material: Aluminized Steel Tip Material : Polished Stainless Steel
Piping Size: 3.0" Tip Size: 3.0"
Muffler Type: Chambered Fitment: 87-93 LX and 86 GT Mustangs


Mid Pipe Specifications
Style Mid Pipe: Standard length "X" Type Headers Required: Shorty
Piping Material: Aluminized Steel Piping Size: 3.0"
Catalytic Converter: "No" - For off-road use only Fitment: 87-93 LX and 86 GT Mustangs


Brick's Picks - AmericanMuscle's Mustang Expert
The Flowmaster American Thunder 3" Exhaust System is an excellent system for running your Pony at the track in your quest for more power. Constructed from aluminized steel, Flowmaster makes a good quality product at a great price. This Exhaust System is a great choice for your 5.0 LX Mustang.brick sig
Brick's Sound RatingStock Sound Rating 3 out of 9
Stock Exhaust Flowmaster Sound Rating 8 out of 9 Flowmaster Exhaust


Installation Instructions
Mustang Rear Gears - Tech Article Buyers Guide to Mustang Exhaust - Tech Article Mustang Rear Gears - Tech Article Understanding Mustang Exhaust - Tech Article

Mustang Fitment: 1987, 1988, 1989, 1990, 1991, 1992, 1993

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