ISR Performance Single GT Exhaust - 98-05 Lexus GS300

The ISR Performance Single GT Exhaust is a single-exit catback system for the 1998-2005 Lexus GS300. A 3-inch mandrel-bent stainless pipe runs back to a polished muffler with a 4.5-inch tip, giving the GS300 a clean single-exit look with the deep tone the platform is known for. A good fit for naturally aspirated or turbocharged builds where dual-exit packaging isn't a priority.

What It Does

Single-exit catback replaces the factory exhaust from the cat back to the tip. The 3-inch piping is mandrel-bent for consistent inside diameter, and the polished muffler with 4.5-inch tip exits on the passenger side. Lighter than the factory exhaust and significantly less restrictive, which is the kind of upgrade that pairs well with a turbo 2JZ build that doesn't need dual exits.

Fitment

• 1998-2005 Lexus GS300 (JZS161)

What's in the Box

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

Product Details

Brand: ISR Performance

Part Number: IS-GT-GS3002G

Type: Catback Single Exhaust

Vehicle Fitment: 1998-2005 Lexus GS300

Material: Mandrel-bent stainless steel

Finish: Brushed stainless

Piping Diameter: 3-inch

Tip Diameter: 4.5-inch, polished

Construction: Precision TIG welded

Application: Naturally aspirated and forced induction

Installation: Direct bolt-on, gaskets and hardware included

Sold: Complete single exhaust system

Legality: Off-road and competition use only