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

The ISR Performance GT Single Exhaust for the 1st-gen Lexus IS300 is the more aggressive option in our IS300 exhaust lineup. 3" piping, a large mid pipe resonator, and a high-polished GT-style muffler with a 4.5" tip give the 2JZ-GE a deeper, throatier voice than our subtler MBSE alternative.

What It Does

Catback replacement system. Bolts to the factory mid-section flange and replaces the rear muffler and resonator with a 3" mandrel-bent stainless setup capped off by a high-polished GT muffler. The resonated mid pipe keeps highway drone manageable while still letting the GT muffler deliver the deeper note that distinguishes it from our IS-MBSE-IS300-1G subtler MBSE variant.

Fitment

1999-2005 Lexus IS300 1st Gen (XE10 chassis, 2JZ-GE).

What's in the Box

• 1x axle-back muffler section with 4.5" high-polished tip
• 1x resonated mid pipe
• 2x 2-bolt 3" exhaust gaskets
• 4x bolts
• 4x nuts

Product Details

Brand: ISR Performance

Part Number: IS-GT-IS300-1G

Type: GT Single catback exhaust

Vehicle Fitment: 1999-2005 Lexus IS300 1st Gen (XE10, 2JZ-GE)

Material: Stainless steel, TIG welded

Piping: 3"

Tip: 4.5" high-polished

Muffler: GT-style high-polished

Resonator: On mid pipe

Alternative IS300 Exhaust: IS-MBSE-IS300-1G (subtler MBSE style)

Sold: Complete kit

Legality: Off-road and competition use only