Injen SP1125 Performance Air Intake/Induction Kit for BMW N54 1 Series 135i & 3 Series 335i - Short Ram Cold Air, Open Cone Filter (E82 E88 E90 E91 E92 E93) 3.0 Twin Turbo - Wrinkle Black/Red or Polished

BMW N54 3.0 twin‑turbo induction upgrade by Injen – SP1125

Unlock sharper throttle response, stronger mid‑range pull and addictive turbo spool with Injen’s SP1125 short ram induction system for the E‑chassis 135i and 335i. This high‑flow aluminium setup replaces the restrictive factory airbox with a direct‑fit open cone arrangement and a premium dry media filter, giving your N54B30 the airflow it craves while keeping the ECU happy. Expect a crisper drive, louder induction sound and a cleaner, more efficient intake path.

Real, repeatable results: independently verified gains of up to +12.9 bhp and +12.2 lb ft, thanks to Injen’s patented MR Technology that maintains safe calibration without any mapping. Ideal for daily‑driven cars and tuned builds alike.

Why this intake stands out

• Proven power and torque gains with no software required
• Smooth mandrel‑bent 6061‑T6 aluminium pipework for maximum flow
• EA nano‑fibre X‑1017 dry filter element – high airflow, no oiling, easy to service
• Precision brackets, quality silicone couplers and stainless hardware for an OEM‑like fit
• Under‑bonnet, bolt‑on installation with clear instructions
• Improved induction soundtrack and turbo whistle without cabin drone
• Made in the USA with manufacturer warranty

What’s in the box

• Injen SP Series short ram intake assembly
• EA dry filter X‑1017
• All required fittings and clamps
• Installation guide

Fitment – BMW E‑chassis with N54 3.0 twin‑turbo

Direct fit for the following models:

• 1 Series E82 Coupe 135i 2008–2010
• 1 Series E88 Convertible 135i 2008–2010
• 3 Series E90 Saloon 335i and 335xi 2006–2010
• 3 Series E91 Touring 335i and 335xi 2006–2010
• 3 Series E92 Coupe 335i, 335xi 2006–2010 and 335is 2011–2013
• 3 Series E93 Convertible 335i and 335xi 2006–2010

Part numbers and finishes

• SP1125WB – Wrinkle Black
• SP1125WR – Wrinkle Red
• SP1125P – Polished

Our experience

We’ve installed and run this setup on multiple customer cars and our own demonstrators. Feedback is consistently excellent: better drivability, a noticeable uplift in mid‑range urgency, and that sought‑after turbo chatter. Fitment is tidy, the hardware is robust and serviceability is simple.

Installation and fitting support

Straightforward to fit on the driveway with basic tools. No ECU recalibration required. Prefer professional installation and a health check Book fitting with MJ Modifications in Warwickshire – request a quote via info@mjmodifications.co.uk.

Compatibility check

We can confirm suitability before dispatch. Add your UK registration or last 7 of the VIN at checkout so we can verify the correct application for your E82, E88, E90, E91, E92 or E93.

Search phrases customers use

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Manufacturer

Injen Technology – engineered and manufactured in the USA with warranty support.