ISR Performance MBSE Dual Axle Back Exhaust - 2013-2020 Lexus IS 250/300/350 RWD

The ISR Performance MBSE Dual 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. Twin polished mufflers with sleek rolled tips deliver a deeper, more aggressive tone while opening up flow over the restrictive factory mufflers. Mandrel-bent stainless steel, precision TIG welded.

What It Does

Axle-back replaces just the rear muffler section of the factory exhaust, bolting to the existing mid-pipe behind the rear axle. It's the simplest path to a more aggressive exhaust note on the third-gen IS without touching the cats, mid-pipe, or any emissions hardware. The dual 2.5-inch piping and twin polished mufflers give the car a meaner sound, particularly under throttle, while keeping the rest of the exhaust system stock.

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

• 2x Rear muffler sections with polished rolled tips
• 4x Bolts
• 4x Nuts

Product Details

Brand: ISR Performance

Part Number: IS-MBSE-IS3G

Type: Axle-Back Dual Exhaust

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 polished mufflers

Piping Diameter: Dual 2.5-inch

Tips: Polished rolled stainless

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