CSK BMW N55 Exhaust Rear Box Delete for F20 F21 M135i - Part Number CSK001
Transform the sound of your BMW M135i with the CSK Exhaust Rear Box Delete. This rear silencer delete, also known as a muffler delete or back box delete, is engineered specifically for the BMW 1 Series M135i F20 and F21 with the N55 engine. Fabricated from 304 stainless steel and TIG welded with full back purge, it is a durable, great value exhaust upgrade that delivers an aggressive, motorsport-inspired tone without breaking the bank.
If you are searching for BMW M135i exhaust upgrade, M135i rear box delete, M135i muffler delete, F20 M135i exhaust, F21 M135i exhaust, BMW N55 exhaust mod, BMW 1 Series M135i back box delete or performance exhaust for M135i, this is the proven, UK supplied solution customers love.
Why choose the CSK Rear Box Delete for your M135i
- Designed for BMW M135i F20 F21 N55 for a precise fit and an immediate sound upgrade
- 304 stainless steel construction for strength and corrosion resistance
- TIG welded with back purging for clean, strong, long lasting welds
- Delivers a deeper, louder exhaust note with enhanced turbo and overrun character
- Excellent value performance exhaust mod compared to full cat back systems
- Made to order by CSK Exhaust with a one year manufacturer warranty
We have fitted these for customers and the feedback has been consistently positive on sound quality and build. If you want the classic M135i N55 tone turned up, a rear silencer delete is the go to choice.
Key details
- Product: CSK BMW N55 Exhaust Rear Box Delete Pipe
- Compatibility: BMW 1 Series M135i F20 5 door and F21 3 door, N55
- Part number: CSK001
- Material: 304 stainless steel
- Manufacturing: TIG welded, back purged
- Dimensions: 97 x 22 x 50 cm
- Weight: 6.35 kg
- Warranty: One year CSK manufacturer warranty
- Made to order, please allow manufacturing time
Vehicle compatibility
- BMW 1 Series F20 M135i 5 door hatchback N55 from April 2011 - Present
- BMW 1 Series F21 M135i 3 door hatchback N55 from December 2011 - Present
Sound comparison video
Stock vs CSK Rear Box Delete
Fitting and support
Professional installation is strongly recommended. We offer fitting at Nforcd in Warwickshire. To request a fitting quote, email Sales@nforcd.com.
To ensure the part fits your car, we run a compatibility check prior to dispatch. Provide your UK registration or the last 7 digits of your VIN at checkout.
Please ensure the part is fitted by a professional. If it does not fit perfectly, remove and return it before starting the vehicle.
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Manufactured by
CSK Exhaust