Originally Posted by
Chris Peralta
If the P4 plugs are working good for you and your not killin em I would just keep running them. Chances are the RB plug is not going to seal in there correct anymore either. Glad it's running good for you, the USA is an engine I wish I could still get!!!! I did find an old crankcase laying around if you do end up needing it send me a PM.
Thanks, Chris. I need it but i've been off work for 2 weeks cuz of my leg. Let me get caught up cash wise. One of my friends has a nib usa he wants to sell.