Hi all

I put some Denso IK27 spark plug in my 3 door and it runs so much better. I have been through many a spark plug thread where reputable engine tunners/mappers give them high praise.
I have been on the Denso website and it states that the gap is 0.8mm and gapping them can damage them as they are not designed to be gapped. So my question to tunners/mappers is, do you use them as is (0.8mm) for up the 350bhp on a yb running a dizzy? If this is the case can they do 500bhp on factory gap?




Thank very much.

Tim.