Genuine BMW Spark Plugs 12122455258
OE plugs in the B58TU engine found in the Z4 and Supra A90.
These plugs are also used to reduce ignition timing corrections on tuned 1st gen B58 engines.
We run these at a gap of 0.5mm on our own M140i, we can also gap these plugs before posting.
Other B58 engines
Upgrade for tuned M140i M240i 340i 440i etc
OEM p/n 12122455258