Dinan Carbon Fibre/Fiber Cold Air Intake (CAI) Induction Kit for BMW B58 F-Series: F22 F23 M240i, F30 F31 F34 340i, F32 F33 F36 440i - Sealed Airbox High-Flow Performance Intake System - Fits BMW 2 Series 3 Series 4 Series

Dinan Carbon Fibre Performance Induction Kit for BMW F-Series B58

Give your B58-powered BMW the airflow it deserves. This premium carbon fibre induction system from Dinan replaces the restrictive factory setup with a larger, fully sealed airbox and a beautifully engineered high-flow intake tube. Expect sharper throttle response, crisper turbo spool and a richer induction note, with proven gains of up to +15 hp and +13 lb-ft at 6000 rpm on a completely stock vehicle. Dyno figures also show +13 whp and +11 wtq without any other modifications.

Designed to maximise cold charge air and reduce pressure drop, the kit uses a significantly enlarged airbox and filter element to help the turbocharger work more efficiently. The smooth carbon fibre intake tube removes factory baffles and the resonator that disrupt flow, letting the engine breathe freely while delivering that addictive whoosh under load. It looks as good as it performs too, with durable carbon fibre construction and a high quality finish that keeps your engine bay looking fresh for the long term.

Key features and performance highlights

• Power and torque increase on stock hardware: +15 hp and +13 lb-ft at 6000 rpm, plus +13 whp and +11 wtq
• Sportier induction sound with refined tone under throttle
• Quicker throttle response and improved turbo efficiency
• Fully sealed, increased-volume airbox around 30 percent larger than OEM
• High-flow performance filter with approximately 34 percent more surface area than stock
  Stock: 76.3 in², Dinan: 102.1 in²
• Optimised carbon fibre intake tube for a smooth, unobstructed airflow path
• Injection moulded Air Mass Meter housing approximately 8 percent larger than stock
• Complete carbon fibre construction for strength, light weight and premium appearance
• Straightforward fitment with simple install

Compatibility and applications

Fits BMW F-series B58 models including:

• F22 and F23 M240i
• F30, F31 and F34 340i
• F32, F33 and F36 440i

Why choose this Dinan induction upgrade

This is a true performance intake for daily driving and spirited use. The sealed cold air design targets real-world intake air temperatures, while the larger airbox and filter area reduce restriction as boost rises. The precision carbon fibre tube removes internal obstructions that create turbulence, so airflow stays clean and consistent. We have fitted this kit for customers and the feedback is excellent, with noticeable response improvements and a purposeful sound without drone.

Fitting and support

Professional installation available at MJ Modifications in Warwickshire. Request a fitting quote at info@mjmodifications.co.uk.

Search-friendly fitment and related terms

BMW B58 induction kit, performance air intake system, carbon fibre airbox upgrade, high flow filter for M240i 340i 440i, F22 F23 F30 F31 F34 F32 F33 F36 cold air feed, turbo intake upgrade, MAF housing, performance intake pipe, sealed intake system, engine breathing upgrade for F-series BMW.