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CSK Exhaust

CSK BMW B58 Rear Box Delete F20/F21 M140i

4 reviews
Regular price £399.00 GBP
Regular price £449.00 GBP Sale price £399.00 GBP
exc. VAT £332.50 GBP
Price match

Rear box delete pipe fabricated from 304 stainless steel, specifically designed for the M140i without breaking your bank!

TIG welded with back purge to create the strongest welds possible. The size of the exhaust tips are 3.5 inch.

All our products are made to order so please allow for manufacturing time.


1 Series F20 M140i 5 Door Hatchback (B58)

from April. 2015 - Present


1 Series F21 M140i 3 Door Hatchback (B58)

from Dec. 2015 - Present


Also fits GPF/OPF models.


PLEASE ENSURE THE PART IS FITTED BY A PROFESSIONAL, if it does not fit perfectly please remove and send back before starting the vehicle.


To ensure the part(s) you have ordered fits your vehicle, we run a compatibility check prior to dispatch. We can do this either using your registration number(UK) or the last 7 digits of your VIN. Simply enter your car details prior to checkout.



Manufactured by

CSK Exhaust



One year CSK manufacture warranty.

    CSK BMW N55 Rear Exhaust Box Delete F20/F21 M140i | ML Performance UK


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      For in stock items, get FREE Guaranteed next day UK delivery for orders over £99, excluding larger items and certain remote postal codes/areas. Same day dispatch available if your order is placed before 1pm UK Time.

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    Customer Reviews
    5.0 Based on 4 Reviews
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    Filter Reviews:
    Stephen M.
    United Kingdom United Kingdom

    Superb quality

    Excellent service throughout, great price, great communication, excellent quality, highly recommend seller and product

    Azzanie M.
    Brunei Brunei

    CSK Muffler

    This CSK Muffler is a high quality product that i recommend to all M140i owners. Had this muffler with a straight pipe combo definitely unleash the inner beast of that M140i! Thanks ML Performance!! Your service is never a let down!! Keep up the good work!!

    ML Performance CSK BMW B58 Rear Box Delete F20/F21 M140i Review
    Peter Cs.
    Slovakia Slovakia

    super company

    quick delivery and top quality product, the sound of CSK rear box delete is amazing thank you

    Anthony H.

    Great company and products

    Firstly the experience dealing with ML performance was fantastic! easy to order, great product knowledge and extremely fast delivery on the items I ordered. Just a very professional company that is run by genuine car enthusiast and are more than happy to help you find what you want. The quality of the exhaust is great, from the fit of it which took me about 20 minutes to put on the car and there was no messing about trying to get it to fit right it just went straight on. The welds are a work of art and the finish is top quality too. Now the most important part, the sound! and what a sound it is.... you can still cruise down the motorway and its not that much louder than the standard exhaust at around 70mph. But put it in sport mode and it sounds like something straight out of the DTM touring car championship. lots of pops and bangs on the over run and that very satisfying sound from the waste gate when you change gear, love it!