AWE Tuning S-FLO Carbon Fibre Intake Kit – BMW F3x 428i
Upgrade your BMW 4 Series 428i with the AWE Tuning S-FLO Carbon Fibre Intake Kit. This premium, fully sealed carbon fibre air intake delivers proven horsepower and torque gains, sharper throttle response, a deeper induction tone, and stunning under-bonnet aesthetics. It is the perfect bolt-on performance air intake for BMW F3x 428i drivers who want real power, real sound and real quality.
Proven performance: independent testing from AWE shows max gains of up to 16 hp and 17 ft-lb at the crank. Expect improved airflow, quicker turbo spool and a more responsive drive, all while keeping your BMW operating check-engine-light free.
Key features
- Fully sealed carbon fibre airbox and high-flow S-FLO Filter for true cold-air performance
- Carbon fibre turbo inlet pipe that removes the factory silencer for enhanced turbo spool sound
- Max gains of 16 hp and 17 ft-lb of torque at the crank
- Perfect integration with OEM inlet ducting, retains stock mounting locations
- Plug-and-play MAF and breather connections for straightforward installation
- UV-stabilised 2x2 twill carbon fibre with clear coat to resist yellowing from heat
- Durable, washable S-FLO Filter designed specifically for the AWE S-FLO airbox
- No Check Engine Light - Guaranteed
- Perfect Fitment - Guaranteed
Why choose the AWE S-FLO for your BMW 428i
This AWE Tuning S-FLO Carbon Fibre Intake Kit for the BMW F3x 428i is engineered to out-flow the stock system while remaining fully enclosed. The sealed carbon fibre airbox draws cool air from the factory ducting, helping reduce intake temperatures. Under load you get a richer, more purposeful induction note with a distinctive turbo spool, without unwanted drone or any warning lights.
Carbon fibre airbox
Crafted from high-grade, UV-stabilised 2x2 twill carbon fibre, the airbox is designed to handle engine bay heat while maintaining a deep, glossy finish. It mounts securely in the stock location, mates perfectly with the OEM air inlet, and offers simple access for filter inspection and servicing.
AWE S-FLO Filter
The included AWE S-FLO Filter is optimised for the S-FLO airbox to maximise airflow and support the quoted power gains. It is durable, washable and reusable, making maintenance quick and cost-effective.
What’s in the box
- Carbon fibre airbox
- AWE S-FLO high-flow filter
- Carbon fibre turbo inlet pipe
- All required mounting hardware
Installation and fitting
This intake is a direct, bolt-on upgrade that retains factory mounting points and connects to OEM ducting for an OEM-plus fit and finish. For professional fitting, book with Nforcd in Warwickshire. Request a quote at Sales@nforcd.com.
Trusted by enthusiasts
We have fitted and used this AWE Tuning S-FLO Carbon Fibre Intake Kit on customer cars and our own builds, and the feedback is consistently excellent. Customers love the quality, the perfect fitment and the real-world performance and sound improvements it delivers on the BMW 428i.
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