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07-28-2003, 02:23 PM
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#2 |
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Registered Member
Join Date: Apr 1999
Location: Grass Valley, CA, USA
Posts: 1,389
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NGK tr-5 is the stock heat range, i believe.
copper plugs deliver more power potential than platinum plugs though they will need replacing more often. with boosted or nitrous applications, a cooler heat range is desireable. typically, in a stock application spark plugs will give no significant performance enhancement unless the old plugs are fouled/old/etc.
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