u r rite soulfly........ like day 2 day use cars they recommend 5 or max 6....... 7-9 range is for hard core kakis...... 9k-10k rpm!!!Originally posted by soulfly@Apr 11 2005, 16:54
for sparkplugs, when should we choose 6 and when should we choose 7? it should depends on engine potential also right? coz in term of spark plug choosing, higher rating doesn't always mean the best am i right?
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