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I have a 89 KA24E. .040 over, IT built motor. The last couple of races have had the high RPM go lean and start to overheat. The problem does not start until about 4 or 5 laps of hard driving. At LRP, when the problem started, I immediately pulled into the paddock and took a look at the car...

I am going to re-do the exhaust on my ITA 240. I want something quiet, but fast. Is there is a good off-the-shelf exhaust system that is quiet and gives the best HP/torque numbers? There is enough after-market tuners for these cars, I was hoping someone had some real experience. Thanks, Jeremy