APEXi N1 Performance Catback Exhaust (Lexus 01-05 IS300)

The N1 series muffler by Apexi has become a staple in the import tuning industry, known for its classic angled muffler design. Originating from Apexi's involvement in the demanding N1 endurance series, the N1 exhaust system combines a straight-through racing muffler with free-flowing, mandrel-bent piping. This design has proven to deliver dyno-tested horsepower gains and has garnered satisfaction from customers worldwide. Classic Angled Muffler Design: The N1 series muffler was the first to incorporate the now-familiar angled muffler design, setting a standard in the import tuning industry. Straight-Through Design: The racing muffler features a straight-through design, optimizing exhaust flow for enhanced performance. Mandrel-Bent Piping: The piping is mandrel-bent to ensure smooth and unrestricted exhaust flow. The diameter varies (60.5mm for naturally aspirated and 80mm for turbo applications). Track-Use Design: The N1 exhaust system is designed with track use in mind, pr