I just bought a 93 civic si and it has a brand new b16a shipped from japan put in it. The motor mounts need replaced on it and I am not sure if I should go with the stock motor mounts for the si or get the b series motor mounts. Because right now it has the stock mounts on it, but I am wondering if that is the reason they are busted. Actually only the front left one by the driver side tire is blown out and the front right by the passenger side tire is just a little worn and cracked. Should I replace them all at once and which kinda should I get??

 

Sounds like a troll thread but I'll give it a go. You're saying it has a "brand new" B16 in it? If the motor is already in, it should be installed with B-series mounts. If you think they need replacing, you'll need B-series mounts.