Injen SP1128P/SP1128 BMW N55 Cold Air Intake (CAI) Induction Kit - M135i M235i M2 335i 435i F20 F21 F22 F87 F30 F31 F34 F32 F33 F36 - Short Ram/Open Cone Performance Turbo Intake System - Polished Tube, Dry Filter, Heat Shield, +13hp/+11lb-ft

Injen SP1128P Induction Kit for BMW N55 Engines - M135i, M235i, M2, 335i, 435i

Transform the way your F-series BMW drives with the Injen SP1128P induction system. This open cone setup replaces the restrictive factory air box and intake tract with a polished aluminium intake pipe, a high-flow dry nanofibre element and a heat shielded air box for colder charge air. Verified on the dyno for gains of up to 13 bhp and 11 lb ft, you get sharper throttle response, stronger mid-range pull and addictive turbo spool sound. No remap required thanks to Injen’s patented MR Technology that keeps fueling within safe parameters.

We’ve fitted this kit on multiple N55 cars at MJ Modifications and the feedback has been outstanding for fit, finish and performance. If you want a simple, bolt-on upgrade that maximises airflow and lets the N55 breathe, this is the one.

Key features

• Direct-fit induction upgrade for BMW F-series with the N55 turbo engine
• Up to 13 bhp and 11 lb ft on a standard car, with crisper pedal feel
• Polished 6061-T6 aluminium intake tube for smooth, unrestricted airflow
• Dry EA nanofibre filter element X-1021 - excellent filtration, no oiling required
• Heat shielded air box helps reduce intake temperatures for denser charge air
• Patented MR Technology - safe AFR control, no ECU calibration needed
• Quality silicone joiners, stainless clamps and CNC brackets for OE-like fit
• Enhanced induction noise and turbo flutter without cabin drone
• Made in the USA with a two-year Injen warranty

What you receive

• Injen SP Series intake system in polished finish
• Dry EA nanofibre air filter X-1021
• Heat shield and mounting hardware
• Silicone couplers, clamps, brackets and instructions

Compatible vehicles

• BMW M135i - 2012 onwards - F20 F21 including xDrive
• BMW M235i - 2014 onwards - F22
• BMW M2 - 2016 onwards - F87 with N55
• BMW 335i - 2012 onwards - F30 Saloon, F31 Touring, F34 Gran Turismo including xDrive
• BMW 435i - 2014 onwards - F32 Coupe, F33 Convertible, F36 Gran Coupe including xDrive

Part number

Injen SP1128P

Installation

Straightforward bolt-on fitting with basic tools. For professional installation, book with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a fitting quote.

Fitment check

To confirm compatibility before dispatch, add your UK registration or last 7 of the VIN at checkout and our team will verify the correct application for your car.

Availability

Polished finish is on back order only. We aim to deliver within 5 to 10 working days.

Why enthusiasts choose this N55 upgrade

Bigger airflow, cooler charge, better sound and proven power. The SP1128P is a fast, reliable route to improved performance on the N55 platform without touching the ECU. Customers love the crisp induction note, the improved spool and the clean look in the engine bay.

Search terms to find this item fast

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