Thread: Spark Plug
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#7: 04-01-2006, 09:42 PM
mccorry's Avatar
Title: I'll be baack!
Location: Grove City, Ohio
Car: 2005 LGT 5MT Stg. 2.5 / 69 Camaro RS/SS
Posts: 9,462
iTrader: (20)
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Just to verify... the i's use Platinum... the GT's use Iridium.

Spark plugs will not make more (significant) HP
Replacing severly worn spark plugs can increase milage.