Scorpion Exhausts Decat Downpipe / Cat-Delete Turbo Front Pipe for BMW 1 Series M135i F20 F21 N55 (2012-2013 pre-LCI) - 76mm 3in Catless Race Track Pipe, Turbo Outlet Elbow, Stage 2 Upgrade - Fits OEM & Scorpion Cat-Back

BMW M135i F20 F21 N55 Cat-Delete Turbo Front Pipe by Scorpion

Unleash your 2012 to 2013 1 Series M135i with Scorpion’s cat-delete turbo front section. This race-focused upgrade swaps the primary catalyst for free-flowing 76.2 mm 3 inch pipework to minimise back pressure, sharpen turbo response and add a more assertive soundtrack when paired with suitable mapping. It joins directly to the standard rear system or a Scorpion cat back for a simple, clean installation.

Why enthusiasts choose this upgrade

• Designed specifically for BMW M135i F20 F21 N55 2012 to 2013
• Large-bore 76.2 mm 3 inch tubing for improved gas speed and stronger mid-range pull
• Catless track-use design for maximum performance potential with Stage 2 style calibrations
• Bolts to the factory rear section and Scorpion cat back systems for hassle-free fitment
• Engineered by Scorpion for quality, accuracy and durability

We have installed this hardware on customer M135i builds and feedback has been consistently positive. Drivers report faster spool, crisper throttle and a deeper, more purposeful tone once mapped. A proven bit of Stage 2 hardware for the N55 1 Series.

Key details

• Application: BMW 1 Series M135i F20 F21 with N55, model years 2012 to 2013
• Configuration: primary cat delete turbo outlet front pipe
• Diameter: 76.2 mm 3 inch large-bore
• Compatibility: mates to OEM rear system and Scorpion cat back exhausts
• Use: closed-circuit and off-road only
• Approximate weight note: OEM 2.1 kg, Scorpion 3.8 kg, 1.7 kg change
• Advisory: on vehicles built before June 2013 the engine management light may illuminate. Stage 2 ECU remap recommended

Fitting and support

Professional installation recommended. Book fitting with MJ Modifications in Warwickshire or request a quote at info@mjmodifications.co.uk. We can advise on mapping and how best to pair this front section with your existing system.

Important information

• This product removes a factory emissions control device and does not comply with current road-use emission laws
• For off-road or track use only. May not pass MOT or roadworthiness tests
• ECU calibration is strongly advised to optimise performance and manage potential EML

Also searched as

BMW 1 Series M135i N55 cat delete, F20 F21 turbo outlet pipe, M135i race down pipe, 3 inch front pipe M135i, N55 Stage 2 hardware M135i, F2x M135i de-cat pipe, M135i catless turbo elbow, BMW 1er M135i exhaust upgrade, N55 hot side pipe M135i, M135i track pipe, BMW M135i 2012 2013 performance front section, fits stock back box, Scorpion performance front pipe, M135i tuning parts UK, BMW 1 Series N55 exhaust mod, pre-LCI M135i exhaust upgrade.