BMW 2 Series M240i F22 F23 B58 Exhaust Axle Back Straight Pipe / Back Box & Muffler Delete Rear Silencer Replacement – 304 Stainless TIG Welded – CSK Exhaust CSK004 (UK Made)

CSK004 Back Box Removal Pipe for BMW M240i F22 F23 B58

Turn up the character of your B58-powered M240i with this UK-made axle-back straight section from CSK. Crafted in 304-grade stainless with fully back-purged TIG welds, this rear section replaces the back box to deliver a richer, more assertive soundtrack while keeping quality and fitment front and centre. It is a brilliant value sound upgrade for drivers who want a neater, stronger and longer-lasting rear section that looks right and fits right.

We have supplied and fitted these on customer cars and our own builds, and the feedback has been consistently positive on tone, finish and fitment. If you are chasing an M240i exhaust upgrade with a deeper note and more presence without buying a full system, this is the go-to choice.

Key features

• Vehicle specific for BMW M240i B58 - F22 coupe and F23 convertible
• 304 stainless steel for durability and corrosion resistance
• Precision TIG welded with a full back purge for clean, strong welds and a tidy internal finish
• Hand built to order in the UK by CSK Exhaust
• Great value alternative to a full cat-back, with a more aggressive rear section tone
• Supplied with a one year CSK manufacturer warranty
• Part number: CSK004

Fitment

• BMW 2 Series F22 M240i B58 - production from 04/2015 onward
• BMW 2 Series F23 M240i B58 - production from 12/2015 onward

Installation

Professional fitting is strongly recommended. If the item does not align as expected, please remove and return it before starting the vehicle.

Want us to install it for you? MJ Modifications in Warwickshire offers fitting services. Request a quote at info@mjmodifications.co.uk.

Order checks and lead time

We verify compatibility before dispatch so you receive the correct part. Add your UK registration or the last 7 digits of your VIN at checkout. As this item is made to order, please allow build time prior to shipping.

Manufacturer and warranty

Manufacturer: CSK Exhaust

Warranty: One year CSK manufacturer warranty

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