I have b18a with placeracing mounts in my crx and I was wondering if there was any way I could make it stiffer because the engine shifts alot when launching and on/off the gas.

 

There are no inserts for those mounts, as they are already solid urethane. The Place Racing mounts are good and shouldn't be letting the motor move much at all. Start the car, open the hood, and have someone stand on the side of the car, while you give it gas (in neutral), to see if the motor moves too much. If the motor moves too much then, it could be a broken mount or bracket.

But I to me it sounds like a bad rack and pinion. Mine went bad, and it also mad a thump everytime I let off the gas. HTH.

 

If they're not stiff enough, then get the MADD engineering mounts, those are smaller mounts with a small line of urethane, guaranteed to be stiffer.