You can (somewhat) reach your goal by using 180 degree headers on your engine. This type of header design optimizes the effect of exhaust scavaging and engine firing order. The down side to this style is that (often) the headers are a mess to route due to cross-over tubes that are required. If you have something with very little space in the engine bay or very little ground clearance, I wouldn't attempt it. The upside to this design is added horsepower and an exhaust note that sounds more like a high-winding over head cam or twin cam engine. They have been used in drag racing and in Nascar. The certainly do work well and sound great.

- EM