Hi, guys. I have a quick question. I have looked everywhere for some info on the new SP546 plugs that superseded the SP515 plug and cannot find anything.

Can anyone here confirm whether or not the new 546s are 1 piece or are they still a 2 piece? Thanks in advance.

 

As far as I know, the ORIGINAL plugs in the 2007 were two piece, but ALL aftermarket plugs are now one piece.

 

I just installed some, they are one piece.

 

Thanks, everyone. Much appreciated.