I did a little digging around and found that the 87' 230E uses a pipe that isn't compatible with any other years. And nobody makes an exhaust for the 87. Would it be possible to have someone make me an exhaust that is a little bigger? I want the increase in size to compensate for the extra air I'm going to have once I get the hot cam stage 1 cam. I was wondering if somebody out there knows how to enlarge my intake and exhaust valves. I probably will have the motor torn down all the way and replace all wear and tear items. Maybe coat the cylinder walls with nicasil. What else can be done to make the 230 to make it a power horse? Newer larger carb?