Upgrade your braking performance with this complete 380mm front brake disc conversion kit — designed to fit models originally equipped with 340mm front discs. This setup replicates the braking system found on the high-performance BMW M3 / M4, delivering superior stopping power, improved heat dissipation, and a sportier appearance.
Precision-engineered for a direct bolt-on fit, this kit allows you to upgrade your braking system with no modifications required.
📦 Kit Includes
2 × Front Brake Caliper Carrier Brackets
CNC machined from high-tensile SG (spheroidal graphite) strength steel for maximum durability and precision fitment
4 × High-Grade Fitting Bolts
1 × Left Hand (LH) Front Brake Disc – 380mm
1 × Right Hand (RH) Front Brake Disc – 380mm
✅ Key Features
Increases disc size to 380mm for improved braking performance
Brackets made from high-tensile SG strength steel for exceptional rigidity and safety
High-quality materials ensure long-lasting performance and corrosion resistance
Perfect upgrade for street, fast road, or track use
⚙️ Compatibility
BMW M135i / M140i (F20 F21)
BMW M235i / M240i (F22 F23)
BMW 330d / 335d / 335i / 340i (F30 F31 F34)
BMW 430d / 435d / 435i / 440i (F32 F33 F36)
This conversion allows you to fit the larger 380x30mm discs found on the M2/M3/M4 F8x, transforming both the performance and aesthetics of your BMW’s braking system.
BMW M Performance / M3-M4 Front Calipers
The 380mm discs are designed to work with Brembo 4-piston calipers found on the F8x M3/M4 or M Performance kits.
Your existing 340mm calipers cannot be reused, as the offset and pad sweep are different.
Suitable Brake Pads
You can use M3/M4 or M Performance brake pads compatible with the calipers you are fitting.
Choose pads according to your driving style (OEM, fast road, or track).
Compatible Brake Lines (Optional but Recommended)
OEM lines can be reused, but stainless steel braided hoses are recommended for improved pedal feel and durability.
These will fit behind OEM 18" alloy wheels with a 12mm spacer
Compatible with 2Forge, Protrack, and similar lightweight alloys without spacers.
We will endeavor to deliver your order to you within 3-5 working days, providing the goods are in stock (Unless a longer delivery period is clearly stated on the specific product page). If we are not able to meet this deadline, we will contact you within 5 days of receipt of your order to arrange an alternative delivery date. However, if this is not acceptable to you, we will offer you the choice of cancellation or a refund.
Please note that deliveries to Ireland, Isle of Man, Isles of Sicily, The Highlands and Islands of Scotland can take longer than 3-5 days to deliver - Please ask if express delivery is required. In some cases we may contact you with a quote for international shipping where the cost for shipping for the chosen destination is not available at the time of your order .
Standard delivery is a Delivered Duties Unpaid (DDU) shipping service. This means buyers won't pay duties and tax at checkout but WILL have to pay the carrier for duties and taxes on delivery in the destination country.
UK CUSTOMERS
You'll pay all postage, taxes, and import charges upfront, and you won't have to pay any extra charges when your item is delivered. Tracking is always included so you can track your item right to your door.