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Hydraulic Handbrake and Proportioning Valve Brake Line Kit Let's Race
The kit brings the line and fittings for a hydraulic handbrake on the rear brake circuit: 4.75 mm copper line, a tee, 11 fittings and 10 clamps. You choose the line length, the type of tee, the proportioning valve and the handbrake from the options.
What is in the kit
| Line | copper, 4.75 mm diameter, 0.9 mm wall, 5 m or 10 m (your choice) |
| Tee | M10x1 female thread on each side, with mounting hole; brass or standard (your choice) |
| Fittings | 7 x M10x1, 1 x 7/16, 1 x 3/8, 2 x short 3/8; 5 mm bore |
| Clamps | 10, aluminium with rubber cover, for 4.7 mm line, 5 mm mounting hole |
| Proportioning valve | optional: OBP knob 0-60%, OBP lever 6 settings or Let's Race lever 7 settings, all with M10x1 ports |
| Handbrake | optional: Let's Race vertical with lock (310 mm lever) or CNC71 V2 vertical (0.625 or 0.75 master cylinder), both with 7/16 inlet and 3/8 outlet, matching the fittings in the kit |
| Part number | LR0280Z |
How the run is usually plumbed
- A hydraulic handbrake is normally fitted inline in the rear circuit: the line leaving the master cylinder for the rear axle goes into the "in" port of the handbrake cylinder.
- From the "out" port the line runs to the rear, where the tee splits it to the left and right wheel.
- At each wheel, the copper line connects to the caliper's flexible hose.
- The proportioning valve, if you use one, also sits on the rear circuit line, so you can set how much pressure reaches the rear calipers.
- The clamps hold the line to the body along the whole run.
Fitting and warnings
- Bench bleed the handbrake cylinder before connecting the lines.
- Bleed the system starting from the caliper farthest from the master cylinder. Do not pull the handbrake lever while bleeding, or it traps air.
- Inline fitting assumes the rear axle is fed by one line. On cars with a diagonal split circuit the layout changes: check your car's circuit before you order.
- This is a kit for competition, rally and drift cars.
Before you order
- You can add a hydraulic handbrake from the options; other handbrakes are in the hydraulic handbrake collection.
- The handbrake master cylinder size (0.625 or 0.75) depends on the rear calipers; if you are not sure what you need, ask before you order.
- Check the port threads on the master cylinder and the handbrake: the kit has M10x1, 7/16 and 3/8 fittings.
- The proportioning valves in the options have M10x1 ports, like the fittings in the kit.

Hydraulic Handbrake and Proportioning Valve Brake Line Kit Let's Race
Sale price240,00 lei
