Sale

Brakes Brake Systems And Components

Ksport

Dualcomp Rear 4-Piston Big Brake Kit

$3,621.20 $3,439.88 Save $181.32

SKU: BKBM330-445CO

In Stock
In Stock
Ships by Aug 4
Free Shipping over $100
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

This kit utilizes a unique dual caliper system, with two pistons dedicated to the primary foot brake and the other two independently managing the handbrake function. This design ensures robust and reliable braking performance under demanding conditions. Constructed with CNC machined carbon steel caliper brackets, the system bolts directly to the OEM caliper bracket location, facilitating installation despite the larger caliper size. The kit features lightweight two-piece rotors that can be optioned as either cross-drilled for better cooling on daily drivers or slotted for enhanced performance on track use. Included are Ksport's SC5 Street Brake Pads, designed for optimal street and occasional track performance with reduced dust and noise, operating efficiently between 194°F and 1022°F. The kit also incorporates D.O.T. compliant stainless-steel braided brake lines, which prevent hose expansion under pressure for a quicker pedal response and a firmer pedal feel. This specific kit, Model #BKBM330-445CO, includes (2) forged, monoblock aluminum calipers, (2) lightweight two-piece rotors (slotted or drilled), (1) set of SC5 Street Brake Pads, (2) stainless steel brake lines, and all required mounting components. It is designed for the BMW X5 F15 model years 2014-2016. Please note that Ksport Big Brake kits are built to order, requiring a production and delivery time of 4-6 weeks. The product also carries a Proposition 65 warning regarding potential cancer and reproductive harm.

MIA's Description

The Ksport Dualcomp Big Brake Kit is a rear 4-piston brake system designed with drifting and rally racing in mind. It features a dual caliper setup where two pistons are used for the foot brake and two for the handbrake, each operating independently. This complete bolt-on system includes calipers, floating brake discs, brake pads, a handbrake, and all necessary hardware for installation.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandKsport
Part NumberBKBM330-445CO
CategoryBrakes

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy