Thread: GTM Performance Engineering: MHI Twin Turbo Official Release
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Old 06-08-2013, 08:38 PM   #881 (permalink)
Baer383
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Originally Posted by Cell View Post
Everyone getting this kit, also getting colder spark plugs or sticking with the stock plugs? Would colder plugs be much more beneficial?
1 step colder HKS Part No. 50003-M40HL
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