Lexus IS300 Performance Exhaust - Rear - ISR Performance - MBSE Axle Back - `99-`05. This ISR Performance MBSE axle-back is a direct-fit rear exhaust section designed for 1999–2005 Lexus IS300 owners who want a more pronounced, purposeful sound without major modifications.

Built to replace the factory rear muffler assembly, this axle-back focuses on improving exhaust tone and exhaust flow characteristics while maintaining a bolt-on installation. It preserves the factory hangers and mounting points for an easy swap and is intended for enthusiasts who want a refined, aggressive rear-end note without changing mid-pipe or headers.

Features

• Fits 1999–2005 Lexus IS300 rear axle-back applications
• ISR Performance MBSE single-exit configuration
• Direct-fit for factory mounting points and hangers
• Designed to change tone while retaining stock routing

Installation is straightforward for a shop‑equipped technician or our in-house teams. We offer on-site installation and customization at both of our locations, and our staff can answer fitment questions, discuss exhaust tone expectations, and help with scheduling.

Call us with any questions: 512-982-9393 (TX) or 562-981-6800 (CA). We have locations in Austin, Texas and the Los Angeles, California area where we perform installation and customization services on premises. If you are considering purchasing multiple items, contact us for potential shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov