Billet PPF Spacer

Upgrade your Mazda MX-5/Miata with this billet 6061-T6 aluminium PPF spacer, finished in durable red anodizing. Designed to replace the original cast steel piece, this spacer is crafted to withstand the stresses that can arise from engine torque roll—especially common as these cars age or receive power upgrades.

Installation instructions can be found here: 0003-NA-10.11.9.A.B-BPS_v000

The factory PPF spacer is prone to cracking due to engine rocking (or torque roll). This can occur even in unmodified vehicles, primarily due to the progressive failure of the hot side engine mount. This engine movement puts extra stress on the PPF and the spacer, often leading to breakage, typically near the mounting bolt to the differential housing. Higher-torque engines with modified setups can exceed even the limits of new mounts, making this a frequent issue among MX-5 owners. Many recognize this problem as “gearbox wander,” where aggressive shifts can misplace gears—like hitting 2nd instead of 4th.

While additional supports like engine dampers, PPF braces, or stiffer mounts help reduce load on the spacer, this billet replacement is made to handle more abusive driving conditions, including hard shifts, launches, and higher power levels—even if additional bracing isn’t installed.

If you’re experiencing gearbox wander or have a broken spacer, start by checking your engine mounts. If those are in good condition, this high-quality PPF spacer is designed to be a more resilient replacement, ready to take on the demands of spirited driving and increased power output.

Please check that this kit fits your vehicle in the vehicle fitment tab.