ISR Performance GT Single Axle Back Exhaust - 2013-2020 Lexus IS 250/300/350 RWD

The ISR Performance GT Single Axle-Back Exhaust is a rear muffler section replacement for the 2013-2020 Lexus IS 250, IS 300, and IS 350 in rear-wheel-drive configuration. A single high-polished muffler with an extended GT-style tip gives the third-gen IS a classic GT look while keeping the tone street-friendly. Mandrel-bent stainless steel, dual 2.5-inch piping merged into a 3-inch single muffler section.

What It Does

Axle-back replaces the rear muffler section only, bolting to the existing mid-pipe behind the rear axle. The GT Single layout takes the factory dual exhaust routing and merges it into one polished muffler with an extended chrome tip, giving the car a cleaner, more classic look while still flowing significantly better than the restrictive factory mufflers. Tone is noticeably more aggressive than stock but not loud. this is the right choice if you want presence without drone or street-noise complaints.

Critical Fitment

RWD MODELS ONLY. Will NOT fit AWD models. The AWD Lexus IS uses a different rear exhaust routing and the axle-back will not mount correctly.

Fitment

• 2013-2020 Lexus IS 250 RWD
• 2013-2020 Lexus IS 300 RWD
• 2013-2020 Lexus IS 350 RWD

What's in the Box

• 1x Mid-section Y-pipe
• 1x GT muffler with extended polished tip
• 6x Bolts
• 6x Nuts

Product Details

Brand: ISR Performance

Part Number: IS-GT-IS3G

Type: Axle-Back Single Exhaust (GT Series)

Vehicle Fitment: 2013-2020 Lexus IS 250, IS 300, IS 350 (RWD only)

Drivetrain Restriction: RWD only - will NOT fit AWD

Material: Mandrel-bent stainless steel

Finish: Brushed stainless piping with high-polished muffler

Piping Configuration: Dual 2.5-inch piping merging to 3-inch single muffler

Tip Style: Extended polished GT tip

Sound Profile: Aggressive but street-friendly

Construction: Precision TIG welded

Installation: Direct bolt-on, hardware included

Sold: Axle-back section only (mid-pipe retained)

Legality: Off-road and competition use only