Flowmaster 86-91 Chevrolet Camaro/Pontiac Firebird 2.5in. American Thunder Cat-Back Exhaust System

For the person who wants the look of a traditional dual exhaust system with all the benefits that a Flowmaster Cat-back exhaust system provides. This dual out American Thunder cat-back exhaust system is the perfect choice with a 2.50-inch flanged pipe connecting directly to the catalytic converter and quickly transitioning to a full 3.00-inch mandrel-bent aluminized steel inlet tube flowing into a large case 80 Series Cross-flow performance muffler for a deep powerful sound. The system uses the factory hanger locations for an easy installation and features dual 3.00-inch mandrel-bent tailpipes exiting out the back and are finished off with dual 3.00-inch polished stainless steel tips for a muscular look and sound. American Thunder systems deliver a moderate to aggressive exterior tone with a mild-moderate interior tone and are best suited for the enthusiast who wants their performance to be heard. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, these systems include all necessary parts and hardware for easy installation. Comes with our 3-year Limited Warranty. 1986-1991 Chevrolet Camaro and Pontiac Firebird with a 5.0L or 5.7L Engine using 2.50-inch Flanged Catalytic Converter. - Moderate sound Fits 1986-1991 Chevrolet Camaro and Pontiac Firebird with a 5.0L or 5.7L engine using 2.50-inch flanged catalytic converter.

• Includes Hangers and Hardware for an Easy Installation
• Mandrel-bent 16-gauge Aluminized Steel Tubing
• For 2.50-inch Flanged Catalytic Converters
• 80 Series Crossflow Performance Muffler
• Dyno Tuned for Maximum Performance
• Uses the Factory Hanger Locations
• Moderate Exterior Exhaust Tone
• Mild Interior Tone
• Easy Installation

Give your 1986-1991 Chevrolet Camaro or Pontiac Firebird the appearance and performance of a traditional dual-exhaust system with the Flowmaster American Thunder Part Number 17234 cat-back exhaust system. Designed for 5.0L and 5.7L engines equipped with a 2.50-inch flanged catalytic converter, this system connects at the catalytic converter and transitions into a full 3.00-inch mandrel-bent aluminized steel exhaust path. The dual-outlet layout provides an aggressive, muscular appearance while supporting improved exhaust flow, throttle response, power, and fuel mileage.
The system features a large-case Flowmaster 80 Series Cross-flow performance muffler, delivering a moderate exterior exhaust tone with a mild-to-moderate interior sound level. Dyno-tuned performance helps optimize airflow, while the mandrel-bent tubing maintains consistent exhaust passage throughout the system. Dual 3.00-inch tailpipes exit at the rear and are finished with polished stainless steel tips for a clean, durable appearance. This configuration is well suited to enthusiasts who want noticeable performance sound without an excessively loud cabin.
Installation is designed to be straightforward using the vehicle’s factory hanger locations. The Flowmaster American Thunder 17234 includes the required hangers and hardware for installation, helping simplify fitment and reducing the need for fabrication. Built from 16-gauge aluminized steel tubing, the system provides dependable durability for street-driven performance vehicles. This cat-back exhaust system is covered by Flowmaster’s 3-year limited warranty. Professional installation is recommended, and buyers should verify vehicle configuration and catalytic-converter flange compatibility before ordering.

Features:

• Application: Fits 1986-1991 Chevrolet Camaro and Pontiac Firebird models with 5.0L or 5.7L engines

• Compatibility: Designed for vehicles using a 2.50-inch flanged catalytic converter

• Muffler: Flowmaster 80 Series Cross-flow performance muffler

• Tubing: Mandrel-bent 16-gauge aluminized steel construction

• Tailpipes: Dual 3.00-inch mandrel-bent tailpipes

• Exhaust Tips: Dual polished stainless steel rear tips

• Sound: Moderate exterior tone with a mild-to-moderate interior tone

• Installation: Uses factory hanger locations and includes hangers and hardware

• Performance: Dyno-tuned to support improved airflow, throttle response, power, and fuel mileage

• Warranty: Backed by a 3-year limited warranty

Fitment:
Chevrolet Camaro Base 1988
Chevrolet Camaro Berlinetta 1986
Chevrolet Camaro Iroc-Z 1986
Chevrolet Camaro Iroc-Z 1987
Chevrolet Camaro Iroc-Z 1988
Chevrolet Camaro Iroc-Z 1989
Chevrolet Camaro Iroc-Z 1990
Chevrolet Camaro LT 1987
Chevrolet Camaro RS 1989
Chevrolet Camaro RS 1990
Chevrolet Camaro RS 1991
Chevrolet Camaro Sport 1986
Chevrolet Camaro Sport 1987
Chevrolet Camaro Z28 1986
Chevrolet Camaro Z28 1987
Chevrolet Camaro Z28 1991
Pontiac Firebird Base 1986
Pontiac Firebird Base 1987
Pontiac Firebird Base 1988
Pontiac Firebird Base 1989
Pontiac Firebird Base 1990
Pontiac Firebird Base 1991
Pontiac Firebird Formula 1989
Pontiac Firebird Formula 1990
Pontiac Firebird Formula 1991
Pontiac Firebird S/E 1986
Pontiac Firebird Trans Am 1986
Pontiac Firebird Trans Am 1987
Pontiac Firebird Trans Am 1988
Pontiac Firebird Trans Am 1989
Pontiac Firebird Trans Am 1990
Pontiac Firebird Trans Am 1991
Pontiac Firebird Trans Am GTA 1989
Pontiac Firebird Trans Am GTA 1990
Pontiac Firebird Trans Am GTA 1991