ISR Performance GT Single Exhaust - 99-05 Lexus IS300 1st Gen

The ISR Performance GT Single exhaust for the 1999-2005 Lexus IS300 is a full catback built for owners who want a deep, throaty tone and a single large tip at the rear of the first-generation IS. The factory system keeps the inline six quiet; this kit opens it up with 3 inch piping from the mid pipe back, a large mid-section resonator to keep drone in check, and a high-polished GT-style muffler with a 4.5 inch tip.

Construction details

• 3 inch stainless steel piping throughout
• Precision TIG welded joints
• Large resonator in the mid section to smooth the note
• High-polished GT-style muffler and 4.5 inch tip

Vehicle compatibility

1999-2005 Lexus IS300, first generation.

Kit contents

• 1x Axle-back muffler section with 4.5 inch high-polished tip
• 1x Resonated mid pipe
• 2x 2-bolt 3 inch exhaust gaskets
• 4x Bolts
• 4x Nuts

Installation notes

This is a catback system, so it connects to the existing front section using the included 2-bolt gaskets and hardware. Plan for a lift or jack stands and a helper to hold the mid pipe during alignment. Leave the clamps loose until the tip is centered in the bumper opening, then tighten everything from the front of the system back. The result is a tidy, polished rear end to match the louder tone.

All ISR Performance products are designed for off-road use only.