I am currently running NGK R7234-9's but apparently these are no longer available. Can I use the replacement for these - the NGK R7436-9 or can anyone recommend any other plugs?

Cheers

 

Think C-57`s ar fine but wait till someone confirms , my friend is running them and has T4 , 8 inj set up , 22-30 psi and changes them regular and has recommended them to me so this is what im probably going to run i my saff which is stage 3 also hope someone confirms though

 

You could try the Motorcraft AGPR-12PP8 plugs if your fueling is spot on.
Or if you fueling is slightly out as mentioned in the post above me the Champion C57C is probably not a bad choice

[EDIT] I notice the Champion C57C Spark Plug is no longer being manufactured, Do any of you guys know if a Stage 3 Sapphire should now use the old Champion C57 or the new C57CX?

 

Thanks for your comments. Does anyone run Ford 071's?

 

Keep with NGK 9's. Best plug IMO but also the most expensive......

C57/59's are ok

PP8's DON'T YOU DARE have seen many horror stories of these melting and melting pistions at GREAT expense, Avoid!

The ford 071's i heard good things about upto 450bhp

Choice is yours really. Depends on how deep ya pocket is!

 

Hey guys , can anyone give me a propper part number for the Ford 071's.
Ford New Zealand does not have them in stock, but can order them from the U.K if I provide them with the full product code

Cheers

 

ngk 9s if you can get some.

 

1120834