Again from YugoBernie's library
 The HKS iridium (some have said the HKSes are relabled NGK iridiums) is installed in a VG30DETT cylinder head. The plug appears to be well higher than it intuitively should - the sleeve on the plug not even covering all the threads in the sparkplug hole in the cylinder head. An intuitive judgement, however, can't take the place of real dyno testing when guessing performance.
|