CTS Turbo Induction Kit / Cold Air Intake for BMW N55 M135i & M235i (F20 F21 F22 F23) - Performance Air Intake System, OE-Style MAF, Heat Shield, 3.5" Intake Pipe - 1 Series 2 Series, xDrive Compatible

High-Flow Induction Kit for BMW N55 M135i and M235i

Unlock sharper throttle response, a deeper induction note and real-world power gains on your N55-powered BMW with this premium cold air intake. Designed for the 1 Series and 2 Series straight-six turbo models, this system delivers proven performance and daily-drive refinement in one simple bolt-on upgrade.

Why this intake stands out

Many aftermarket intakes use a round tube for the mass air flow sensor, which can upset airflow readings and cause rough idle, awkward downshifts on ZF autos, and poor fuel consumption. This kit solves that problem with a proprietary OE-style hexagon MAF housing that mirrors the factory profile. The result is smooth drivability, clean gear changes and accurate fuelling on both stock and tuned cars.

Engineered for airflow and reliability

• OE-style hex MAF housing for correct metering and stable idle
• 3.5 inch mandrel-bent aluminium intake tube with durable black powder coat
• Large reusable inverted-cone performance air filter for maximum surface area
• Sealed heat shield airbox that utilises the factory front duct to feed cool outside air
• 4 ply silicone couplers and stainless steel clamps
• Complete bracketry and hardware to prevent movement under engine torque
• Subtle laser-etched branding on the pipework

Expect peak gains of around 10 to 15 bhp on an otherwise standard car, along with a sharper intake roar and more pronounced turbo spool. On the road this feels like crisper mid-range pull and faster response.

Fitment

Designed for BMW models with the N55 3.0 turbo petrol engine:

• F20 and F21 M135i, including xDrive, 2012 onwards
• F22 M235i Coupe, 2014 onwards
• F23 M235i Convertible, 2014 onwards

Suitable for both manual and automatic transmissions.

Easy install, perfect pairing with remaps

This bolt-on induction kit is a straightforward DIY upgrade with basic tools, and it pairs perfectly with stage 1 and stage 2 tuning. The OE-style sensor housing helps maintain correct fuel trims, so you get performance without compromise.

Why buy from MJ Modifications

We rate this intake highly after hands-on use and excellent feedback from customers. It fits neatly, sounds fantastic and delivers repeatable gains. For professional fitting, book in with MJ Modifications in Warwickshire. Request a fitting quote at info@mjmodifications.co.uk.

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