Originally Posted by MattP

I would stick with the GRP plugs if you could. But if you had to use a OS plug it will work like previously mentioned. It's best that if you do use an OS to keep using OS plugs and not switch to another brand because the taper is a tad bit different between those turbo plugs. I have seen head buttons that deformed a tad and wouldn't seal to either after someone kept switching brands a bunch at the track.