Are these correct spark plugs for the Stealth heads?

[Blakcharger440]

I just purchased some NGK 4291 ZFR6F-11 spark plugs for my stealth heads. Are these the correct plugs? They will be going on a 512 stroker with 10.05 compression.

[firefighter3931]

I just purchased some NGK 4291 ZFR6F-11 spark plugs for my stealth heads. Are these the correct plugs? They will be going on a 512 stroker with 10.05 compression.

There was a thread awhile back and i'm pretty sure that's the plug we decided would work in a pump gas type build with the Stealth heads. Check with Mally69 to confirm. He was running those NGK's before the rocker arm failure.



Ron

[mally69]

Yep, I am running NGK's.   The number of plug I am using is ZFR6FGP its the platinum grade plug in the 6 head range. Those plugs were somewhat expensive, but with that number I gave you, you could have them use their chart to get you the same heat range but in a less expensive grade plug. 

[Blakcharger440]

Looks like I got the correct spark plugs! I did a search and found Ron's post where he had googled the parts dinosaur and got the stock number #4291 ZFR6F-11 for the plug.     And they were affordable too at $23.20 for all 8!!!!




Quote from: mally69 on February 20, 2008, 10:02:01 AM
Ok I went into NAPA yesterday and tried to get the  NGK ZFR6F-11  they didnt know what I was talking about. So, I said that these heads use the same plugs as the viper so I got these NGK's in the 6 heat range ZFR6FGP Platinum, Are these the correct plugs for the stealth heads



Ok, try this....just googled that plug number and voila ! Good deal....4 plugs for $11.00 

http://www.store.partsdinosaur.com/product1589.html


Your local parts house might not recognize the part number so try asking for the "stock" number which is 4291 and see what happens. These are the V-Power plugs which have allways worked fine for me.   

That wasn't too hard was it   



Ron

[firefighter3931]