Forge Motorsport Carbon Induction Kit BMW B58 M140i M240i M340i M440i 16+
£456.00
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why buy from us
- 14 Day Return Period
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Description
+11 BHP
+19NM Torque
Induction kit and inlet hose included
Improved induction noise
Full instructions
Prepreg 2×2 twill formed carbon fibre
Lifetime warranty
Direct replacement for OEM part numbers: 13718601678, 13718605164, 13718601682.
The B58 engine is a masterpiece from BMW, and with FMINDK50, you can take its power and sound to new levels. The development team designed a multi-part solution to improve airflow in the BMW M140i airbox and inlet tract.
The Development Journey
Step 1: Replaced blank duct with FMINLD2, a carbon fiber duct to boost airflow to the airbox.
Step 2: Added a high-flow cone filter with an expanded surface area for optimal airflow.
Step 3: Upgraded to FMINLH25, a 5-ply silicone inlet hose with an increased diameter from 85mm to 90mm, designed to handle higher boost.
Innovative Testing Process
SolidWorks CAD, 3D prints, and numerous dyno sessions were used for development. Simulation testing and 3D prototypes ensured optimized airflow, tested both on the dyno and in real-world driving.
Carbon Fibre Advantages
Carbon fibre offers strength, lightweight properties, and reduced heat soak for lower Inlet Air Temps (IATs), improving combustion and engine reliability. The resulting denser air improves AFRs and boosts power through a “bigger bang” in each cylinder.
The Inlet Hose
FMINLH25 features:
– Improved induction noise
– Multi-ply silicone construction for durability
– Increased diameter from 85mm to 90mm for better airflow
– Lifetime warranty
Performance Gains
Testing by Performance Remap on a VTEC 4-wheel dyno shows gains of 11BHP and 19NM torque from 2500RPM to redline. The M140i tested was stock except for a Pipercross filter, though a tuned car will see even greater benefits.
High-Quality Design
The FMINDK50 Hi Flow kit provides critical cold air with a beautiful carbon fibre design that matches the intake manifold. Made with prepreg 2×2 twill carbon fibre in an autoclave, it includes a UV-resistant gloss gel coat.
Installation is straightforward, taking about 1 hour with color instructions included. For questions about compatibility, please contact us with an engine bay photo.
RETURNS & Warranty
Returns Policy
We want you to shop with confidence at Sansoms Specialist Parts. If you are not completely satisfied with your purchase, you may return eligible items in accordance with the policy below.
Returns must be requested within 14 days of delivery
Items must be unused, uninstalled, and in original packaging
Products must be returned in a resaleable condition
Proof of purchase is required
Custom-made, special-order, or clearance items may be non-returnable unless faulty.
How to Request a Return
Please contact our support team before returning any item. Returns sent without prior authorisation may be refused.
Email: support@sansomsspecialistparts.co.uk
Include your order number and reason for return.
Refunds
Once your return has been received and inspected, we will notify you of the outcome. Approved refunds will be processed to the original payment method within 5–10 working days.
Original shipping costs are non-refundable unless the item is faulty or incorrect.
Warranty Information
All products sold by Sansoms Specialist Parts are covered by a manufacturer’s warranty, where applicable.
Warranty coverage typically includes:
Manufacturing defects
Faults occurring under normal use
Warranty does not cover:
Incorrect installation
Wear and tear
Damage caused by misuse or modification
Track or competition use unless stated otherwise
Warranty Claims
To make a warranty claim, please contact us with:
Order number
Description of the issue
Supporting photos or videos
Claims are subject to inspection and manufacturer approval.
Important Notes
Professional installation is strongly recommended
Warranty may be void if parts are incorrectly fitted
Vehicle compatibility is the customer’s responsibility
Need Help?
If you have any questions regarding returns or warranty, our team is happy to assist.
Delivery & Stock
Delivery Options
We aim to get your performance parts to you as quickly and safely as possible.
Standard UK Delivery: 3–5 working days
Express UK Delivery: 1–2 working days (subject to availability)
International Delivery: 5–10 working days (depending on location)
All orders are carefully packaged to ensure your parts arrive in perfect condition.
Shipping Costs
Standard delivery is charged at checkout based on weight and destination
Free UK delivery on orders over £100
We offer tracked shipping so you can monitor your order every step of the way.
Stock Availability
Most parts are held in stock for immediate dispatch
Some specialist or custom parts may have longer lead times
Stock levels are updated regularly, but occasionally items may be temporarily unavailable
If a product is out of stock, we will notify you immediately and offer alternatives or an estimated delivery date.
Order Processing
Orders are typically processed within 1–2 working days
You will receive a confirmation email once your order has been dispatched
Large or heavy items may require additional handling time
Important Notes
Performance parts may require professional installation
Delivery times are estimates and may vary during peak periods
International shipments may be subject to customs or import fees
