86 parts

I would assume you mean body kit parts, because other than cosmetics they are the same mechanics as all other z31's, Different year models all have their mix and match of ecu's and o2 sensors, but other than that the differences are cosmetic. The 86 has a brakelight in the wing, 84-85 nose with 87-89 front fenders (same as 84AE) and 84-85 tail lights with 87-89 flared rear fenders. 86 side skirts are also unique to the 86. Imho, an 86 with an 87-88 front nose is the perfect match of all styles.

http://www.xenonzcar.com/z31/modeldifferences.html