raffa_mk Posted June 12, 2011 Share Posted June 12, 2011 I want to know whats the best spark plug to buy and which heat range for my ep91 n/ai have a few mods, glanza inlet mani, corolla exhaust mani, and coming in a few days 200 cell cat with a straight through cat back system 2.5" with 4" back boxalso have new plug leads fitted and will be replacing dizzy cap and rotory arm,whats the heat range that n/a run on? am i right in thinking its 6heat range i am looking for?raffa Quote Link to post Share on other sites
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