If we had to pick one thing on this car that we are most proud of it would have to be the exhaust. It truly is just a work of art. We really outdid ourselves on this one.
So you may be asking, why did we go through the trouble of fabricating an oval exhaust? It’s quite simple actually. We were forced to by chassis constraints.
BMW engines have the exhaust outlet on the right side of the car. Nissan engines have the exhaust outlet on the left side of the car. This means that the E30 chassis has provisions (a raised floor section) to run an exhaust on the right side of the car, but not the left. If we were to make a round exhaust, it would end up protruding 3″ past the frame rails and scrape on every bump on the road. If we didn’t go with oval pipe, we would be stuck with awful ground clearance.
Full disclaimer: this is my first time TIG welding. I actually bought a TIG welder specifically for this project. I spent about a month practicing before finally diving into the exhaust.