Milltek Sport Rear Exhaust Muffler/Back Box (Axle-Back) for BMW M3 CSL E46 2003–2007 – T304 Stainless Tail Silencer – Direct Bolt-On to OEM Centre Section – Performance Upgrade – Part SSXBM934_1 – UK Made

BMW M3 CSL E46 Rear Box Upgrade by Milltek Sport

Part number: SSXBM934_1

Give your BMW M3 CSL E46 the soundtrack and flow it deserves with this premium rear section from Milltek Sport. Engineered specifically for the CSL variant of the 2003 to 2007 coupe, this tail silencer bolts straight up to the original centre pipe for an easy, hassle-free fit. Crafted from high grade T304 austenitic stainless steel, it delivers a crisp, motorsport-inspired tone with refined manners on the road.

Why enthusiasts choose this rear section

• Direct fit to the factory mid section for quick installation with OEM-style compatibility
• Constructed from T304 stainless for corrosion resistance and long-term durability
• Mandrel-formed tubing for smooth gas flow and consistent diameter throughout
• Optimised bore size to enhance response without sacrificing mid-range torque on the S54 3.2
• Acoustically tuned for a clean, sporty note with minimal drone inside the cabin
• Designed, developed and hand finished in the UK with precise jig-built alignment

Fitment

Model compatibility: BMW M3 CSL E46 2003, 2004, 2005, 2006, 2007. CSL-specific application. Links to the standard centre section.

What you can expect

Sharper exhaust character on throttle, subtle at cruise, and a noticeable improvement in flow thanks to high quality mandrel bends and carefully selected tube diameters. We have supplied and run this setup ourselves and customer feedback has been consistently positive on sound quality, finish and the precise fit.

Fitting service

Want it installed professionally? MJ Modifications in Warwickshire can help. Email info@mjmodifications.co.uk for a fitting quote and availability.

Key details

• Manufacturer: Milltek Sport
• Application: BMW M3 CSL E46 rear section
• Part number: SSXBM934_1
• Material: T304 stainless steel
• Configuration: Rear box that mates to the stock mid pipe

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