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JDB1981 04-13-2015 02:26 PM

spark plugs
 
What are the best spark plugs to use in 2002 hp 500

Strip Poker 388 04-23-2015 12:00 PM

I run AC R42ts in my 500efi's, and they are cheap

CIG3 04-23-2015 01:25 PM

I like NGK R5674-7 but AC R42TS is a good plug. If your going to use the AC use the MR42TS as it is coated and won't rust up over the season.

Dave M 04-23-2015 02:40 PM

I picked up 8 MPH switching to Split-Fires! :evilb:

SB 04-23-2015 05:14 PM


Originally Posted by Dave M (Post 4295983)
I picked up 8 MPH switching to Split-Fires! :evilb:

Wait till you try the Plasma's.

Powerquest230 04-23-2015 08:08 PM


Originally Posted by SB (Post 4296054)
Wait till you try the Plasma's.

They only work if you have the magnetic conditioner on your fuel line.

mike tkach 04-23-2015 08:22 PM

my brother,s daughter,s boyfriend installed a set of e3 plugs in his fountain[hp500] and gained 12 mph!

SB 04-23-2015 10:00 PM

In case anyone is wondering, the OP's question has been answered, thus the derail.


Originally Posted by Powerquest230 (Post 4296136)
They only work if you have the magnetic conditioner on your fuel line.

I have two vehicles that come in my shop that have these.

Interesting enough, they are both older Toyota Tundra's.

VoodooRob 04-24-2015 06:55 AM

Combine the Splitfires, Magnetic Conditioner, and 104+ Octane Boost and you will not be able to keep drives on your boat.

iliveonanisland 04-24-2015 08:00 AM


Originally Posted by Dave M (Post 4295983)
I picked up 8 MPH switching to Split-Fires! :evilb:

I picked up 12 mph but i indexed mine


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