Genuine Porsche distributor timing belt for late air-cooled twin-plug 3.6L models type 964 and 993. This keeps the primary and secondary distributors timed and in sync, ensuring your upper and lower bank spark plugs all fire at the correct time.

A crucial and sometimes overlooked item, failure of this belt can result in significant engine damage depending upon where the ignition rotor of the auxiliary distributor is positioned when the belt breaks. If it stops in a position to make contact with the distributor cap, that particular cylinder's spark plug will continue to fire constantly, usually resulting in an extreme lean running condition and internal engine damage.

Don't rely on luck, replacing this inexpensive item will help ensure proper performance and minimize the risks in ignition related engine damage on these cars. There is typically no set mileage interval on replacement, we recommend annual inspections and / or replacement every 40-60k miles depending on use.