ISR Performance Series II MBSE Resonated Catback - BMW E46 Late 325/330

The ISR Performance Series II MBSE resonated catback for the BMW E46 325i and 330i brings a dual-tip, resonated stainless system to the late six-cylinder E46 in both coupe and sedan body styles. The layout starts with dual 2.5 inch mid pipes feeding a resonator, merges into a 3 inch section, then finishes in a muffler with dual 2.5 inch tips. The result is an aggressive note with a cleaner, more refined character than a straight-through design.

Series II improvements

• Revised pipe routing for improved ground clearance
• Extended tips that reach through deeper aftermarket aero bumpers and look more aggressive on a stock bumper
• Modular rear section: swap to other Series II rear sections such as the EP Dual without replacing the mid pipes
• Stainless steel construction throughout

Fitment

BMW E46 325i, 325Ci, 330i and 330Ci, coupe and sedan. This version requires the OEM 325i/330i header, or an aftermarket header with the same flange orientation and placement. It is not compatible with the early 323 and 328 cars, which use a different header. Check the attached photos to confirm which header is on your car before ordering.

What's included

• 2x Flex mid pipes
• 1x MBSE rear section
• 1x Resonated mid section
• 1x Gasket and hardware pack

Before you order

• Not tested on automatic transmission vehicles
• Not tested on non-USDM chassis

If you have an early 323 or 328, ISR offers a separate Series II MBSE built around that header flange.

All ISR Performance products are designed for off-road use only.