Tested by one of the leading Aussie Magazine, ground wire for new car showed negligible improvement. As for modified car or one with engine replaced, may result up to 10 h.p. (on GT-R). :eek:
No need to buy an after market wire. You can buy audio wire and save money. Usually you need about 5 contacts. They are unequal in length. To alternator, engine block, fire wall, throattle body, injectors, ecu. Any other point that you think should be grounded. It shouldn't cost more than 300 bahts.