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What NGK plugs

Generation III Internal Engine 1997-2006 LS1 | LS6

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What NGK plugs

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Old

Jun 26, 2002 | 02:06 PM

#1

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What NGK plugs

With mods in my sig. What plugs to get ngk tr-5 or tr-55

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Jun 26, 2002 | 02:54 PM

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Trevor @ Texas Speed & Perf.

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Re: What NGK plugs

I'm running the TR-55's gapped @ .050" with great success.

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Jun 26, 2002 | 03:05 PM

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Re: What NGK plugs

TR5s and TR55s are the same heat range, their only difference is the preset gap. The TR5s are at about .039, the TR55s are at about .059. You only want to change the preset gap by about .010, so if you're gonna go with about .050" then either plug will work. If you want to go with lower than that, the TR5 is the one to go with, if you want to go higher than .050, go with the TR55s for sure.

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