Spark Plug

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07-25-2008 | 06:44 AM

bleachers

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From: reisterstown

Spark Plug

What is the best spark plug to use in my 500 hp that has been made to a mild 540/600. i do not even remeber what the OE spark plug number was, i think it was a NGK?

07-25-2008 | 06:50 AM

Run_em_hard

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From: Utah

The stock plug is a NGK, #5 or #4 I think. Can't tell you the part number off the top of my head, sorry.

07-25-2008 | 09:28 AM

DareDevil

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From: Bradenton Florida

I would run a NGK # 6 in it !

I ran those in all my stock and modified engines and they work great.

They are a good mid.range heat plug.

07-25-2008 | 09:59 AM

baja36ft

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From: CHESAPEAKE,VA

Quote:

Originally Posted by bleachers

What is the best spark plug to use in my 500 hp that has been made to a mild 540/600. i do not even remeber what the OE spark plug number was, i think it was a NGK?

a/c mr43t
ngk br6fs