ISR Performance

ISR Performance Single GT Exhaust - 98-05 Lexus GS300

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IS Performance Lexus GS300 Single Exit Exhaust System

The ISR Performance Single GT Exhaust for the 1998-2005 Lexus GS300 is crafted from mandrel-bent stainless steel, emphasizing durability and superior quality. This catback system enhances performance by offering unrestricted airflow, boosting horsepower while maintaining a rich, assertive sound profile. It's an ideal choice for vehicles with both naturally aspirated and turbocharged engines.

Key Details:

  • Emits a rich and assertive exhaust note.
  • Weighs less than the original factory exhaust system.
  • Constructed with precision TIG-welded stainless steel.
  • Features a brushed stainless finish with a polished tip and muffler.
  • The exhaust system includes a 3" diameter pipe with a 4.5'' muffler tip for enhanced flow.


  • Designed specifically for the 1998-2005 Lexus GS300.

Package Contents:

  • One 3'' diameter mid-pipe.
  • One 3'' muffler section featuring a 4.5" tip.
  • Two 3" exhaust gaskets with a 2-bolt flange.
  • Four bolts and four nuts for installation.

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ISR Performance Single GT Exhaust - 98-05 Lexus GS300