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Old 06-24-2009, 12:34 AM   #1
cubuff
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Member#: 38345
Join Date: Jun 2003
Location: Littleton, CO
Vehicle:
2004 WRB WRX

Default Spark plugs for JDM big port heads?

I have a set of JDM ver7 big port heads the problem is they are already bolted to the block and now I am unsure of the plug type used. I am assuming that they use the short WRX style plugs. I just want to make sure that this is right before I risk anything. I have a whole box of bkr7e's so I am hoping I can use these.

Any help would be great, Thanks!
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Old 06-24-2009, 12:50 AM   #2
gto7419
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Member#: 44256
Join Date: Sep 2003
Chapter/Region: Tri-State
Location: Long Island, NY
Vehicle:
2002 WRX Wagon

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jdm spark plug designations as copied from elsewhere on this forum

Stock = PFR6B (good quality platinum plug)
Cooler = PFR7B (one grade cooler than above)
Cooler still = BKR8EIX (iridium 8, but really a long life plug rather than a performance plug)
Race = R7434-8 (hand assembled, dual irdium retracted electrode race plug)
Mad mofo race = R7434-9 (cooler version of above)
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Old 06-24-2009, 02:41 AM   #3
cubuff
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Location: Littleton, CO
Vehicle:
2004 WRB WRX

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Quote:
Originally Posted by gto7419 View Post
jdm spark plug designations as copied from elsewhere on this forum

Stock = PFR6B (good quality platinum plug)
Cooler = PFR7B (one grade cooler than above)
Cooler still = BKR8EIX (iridium 8, but really a long life plug rather than a performance plug)
Race = R7434-8 (hand assembled, dual irdium retracted electrode race plug)
Mad mofo race = R7434-9 (cooler version of above)
Sooo it looks like they do take the same plugs as the USDM 2.0 heads. I will stick with my cheap $2 bkr7e's and replace them every few thousand miles.
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Old 06-24-2009, 04:07 AM   #4
seanathanq83
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Chapter/Region: TXIC
Location: Houston, Tx
Vehicle:
2002 s256 twinscroll
now with one more gear

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correct, got to love 1.99
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