we do a custom type deal for the crx, its slip fit and will come with all the hardware you need. you can pick out your own muffler or get one from us
only looking at fully mandrel bent catback around 185-215:
2.25-2.5-3" all available
that would be the first thing i do to the car. also check for any rust spots and upgrade your fuel and clean out the engine bay.. lot of grim can build up there