AM-BD · Front Brake Duct · Mazda MX-5

Air where it's hot.

A printed nylon duct on a stainless shield. It takes air from a 63.5 mm hose and puts it into the centre of the rotor, where the vanes can use it.

Try the brake test → See the kit
Ahura brake duct fitted behind a slotted front rotor, seen from the inboard side
FIG. 01 — FITTED, INBOARD ISO
Hover to reveal linework

02 — Brake test

Go on.
Stand on it.

Two identical rotors, one lap after another. The left one gets whatever air finds it. The right one gets a hose. Hold the pedal and watch which one starts to glow.

FIG. 02 — TOY THERMAL MODEL
Speed
0 km/h
Stock shield
0 °C
Ahura duct
0 °C

Illustration only. A simple lumped heat model with made-up coefficients, not test data.

03 — Airflow

In. Round.
Out.

A vented rotor is already a pump: its vanes fling air from the centre to the edge. It just needs something to pump.

  1. 01

    In

    A 63.5 mm hose from the front of the car clamps onto the ribbed inlet.

  2. 02

    Round

    The duct turns the air through the gap beside the upright and flattens it into a slot at the plate.

  3. 03

    Out

    The slot opens at the rotor's centre. The vanes take it from there and throw it out through the disc.

04 — The kit

Three parts.
Five fasteners.

The duct is laser-sintered nylon. The shield is two pieces of 1.5 mm stonewashed stainless. Two M4 screws into brass inserts hold one to the other.

The brake duct kit on its own: black nylon duct on a stainless shield plate
FIG. 03 — KIT, ISO
ItemDescriptionQty
    Mass per corner (model)0 g
    0mmHose inlet
    0gPer corner (model)
    0mmStainless shield
    0Fasteners

    05 — Detail

    Printed, cut, signed.

    The name is raised out of the print and picked out in yellow. Nobody will see it once the wheel is on. We know it's there.

    Close-up of the raised yellow AHURA name on the black nylon duct
    Raised identityDET. A
    Rotor side of the shield showing the fixings
    Rotor side — shield & fixingsVIEW B
    Line drawing of the duct fitted behind the rotor
    Fitted — lineVIEW C

    06 — Contact

    Brake later.

    Still in development. If you want a set when they're ready, or you want to help test them, say so.

    hello@ahuramotorsport.co.uk →