When designing a catback you have to have foresight. In this particular situation we needed to think about what would a customer want to do with this car and how would that translate to making a proper fitting exhaust. The first thing was it has to be T304 Stainless 3 inch diameter mandrel bent piping which was a no brainer. Second was to get the exhaust note to a tone that is acceptable without sacrificing the performance of the car. We played with multiple muffler designs, some longer some shorter. We settled on the current size and outer diameter that would equal superb sound quality and incredible performance. The final step was to finish the exhaust with a tip that fits the rear fascia and suits all the lines, a 3.5 inch slash cut tip fit with perfection. So we "thought" we were finished, lowered the car, turns out we needed to rework the midpipe to work on a lowered car. It turns out that this is common problem with other exhaust systems. NOT OURS!