Anyone know the diff between NGK PFR6B-11C and NGK PFR68-11B ? given that i assumed the 6 was the temp rating ? are the B''s cheaper or summit ?

I would have thougt they were same price.

thanks

smithy

hello mate how goes it...have a look at this may shed some light on this..

 

 

http://www.spark-plugs.co.uk/pages/technical/ngkjpg.htm

oh yeah also look at this post thread..

 

http://www.300zx.co.uk/forums/showthread.php?t=164&goto=nextnewest

See here too :- http://300zx.co.uk/forums/showthread.php?t=11766&highlight=pfr6b-11b

 

Can't post my old pics because I'm not at home ...

11b are longer and designed for the zed running higher boost!

FWIW. Note these are PFR6B-11 and PF6B-11C

hello mate how goes it...have a look at this may shed some light on this..

 

 

http://www.spark-plugs.co.uk/pages/technical/ngkjpg.htm

Ok G yeah ;) I had checked that but other than special design, couldn't the difference in the b+c's.

Andy some god links there mate thanks, Anders seems to go into it in some depth and I was about to ask what the difference is between B + C when Mark posted, thanks Mark ;) So from that we've deduced then the US cars had the B and the Jap and UK the C grade, though B is for cars running higher boost, wonder why it's fitted in the US cars ? reason for the questions was that i had a new set of C grade and a set of the B grade that came in with an order lately and wasn't sure which was best to use.

cheers

smithy