AWE Tuning S-FLO Carbon Fibre/Fiber Cold Air Intake & Turbo Inlet for BMW 4 Series 428i F32 F33 F36 (F3x, N20/N26) - Sealed Carbon Airbox, Reusable Filter - Performance Induction Kit, Intake System Upgrade - Gains up to +16 hp/+17 lb-ft

AWE S-FLO Carbon Fibre Induction Upgrade for BMW 4 Series 428i F3x

Unlock sharper response, stronger mid-range pull and a richer soundtrack from your 2.0 turbo BMW with this premium AWE S-FLO carbon fibre induction system. Purpose-built for the F3x 428i platform, it replaces the restrictive factory air path with a lightweight enclosed carbon airbox, a high-flow reusable filter element and a free-breathing compressor inlet pipe for a genuine OEM-plus upgrade under the bonnet.

Independent testing shows gains of up to 16 bhp and 17 lb-ft (around 23 Nm) at the crank, with faster spool and a cleaner, more urgent throttle feel. Expect cool-air performance thanks to the closed design, elevated intake acoustics under load and day-to-day drivability without fault codes.

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Why enthusiasts choose this induction kit

• Enclosed carbon airbox feeds cooler charge air for consistent performance
• Lightweight 2x2 twill carbon fibre with UV-stable clear coat for a deep gloss finish
• High-flow, reusable S-FLO filter for long-term serviceability and low restriction
• Carbon compressor entry pipe replaces the OE silencer for crisper turbo spool sound
• Up to +16 bhp and +17 lb-ft at the crank from reduced pressure drop and improved flow
• Retains factory ducting and mounting points for an OE-fit installation
• Plug-and-play MAF and breather connections for hassle-free setup
• Engine-light friendly design for worry-free daily use

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Engineered to perform

The sealed carbon airbox draws fresh air from the stock front duct, helping combat heat soak while keeping intake noise refined in cruise and nicely pronounced on throttle. The precision moulded carbon compressor inlet smooths the path into the turbo, removing the OE muffler section to cut turbulence and unlock a more responsive feel. The result is a smarter intake path that looks as good as it performs.

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In the box

• Carbon fibre enclosed airbox
• AWE S-FLO high-flow reusable filter
• Carbon fibre turbo intake pipe
• All required clamps, grommets and hardware
• Fitting guide

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Fitment

• BMW 4 Series 428i F3x: F32 Coupe, F33 Convertible, F36 Gran Coupe
• N20 and N26 2.0 turbo petrol engines

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Real-world feedback

We have installed and run this setup on customer cars and our own builds. Owners consistently report cleaner throttle pick-up, a deeper induction note and top-tier build quality. Fitment is precise, the finish is stunning and the driving feel is transformed.

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Installation and fitting support

This is a straightforward bolt-on upgrade that uses stock mounting locations and factory ducting. For professional installation, book with MJ Modifications in Warwickshire. Request a fitting quote at info@mjmodifications.co.uk.

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Search terms our customers use

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