Z4 e85 Spark plugs

[Road2Ruin]

Haveing seen a lot of e85 compatible spark plugs I wondered what most people on here are using and would recommend? The two main ones seem to be the HGK iridium or the Bosch 4 pronged thingys. Both look equally useful but having never used either not sure which way to go.

Ta in advance
Pete

[E30M3SE]

BMW dealer will sell/fit either,

NGK PLZFR6A11S,

or

BOSCH FR7NPP332, there is a set of these on ebay at £35 or best offer inc delivery brand new in BMW boxes.

Edited by E30M3SE on Wednesday 14th March 14:34