5. LS3-Powered BMW E30 M3
It was one of the first cars we stumbled across at the SEMA Show and its remained a favorite ever since. The E30 BMW M3 is a purists car if there ever was one. Plus, it looks absolutely incredible, with a simple, yet athletic coupe design. Sure the factory 2.3-liter 4-cylinder is an impressive motor, but you also can’t argue with the power generated by a Corvette LS3. With that in mind, builder Kevin Byrd added the big V8 plus a few modifications to deliver around 500-hp. (Note: our inclusion of this car in the Top 10 Best of SEMA list is based on the assumption that the factory M3 engine was somehow destroyed. If it was in fact in perfect running order and was swapped out, we now nominate the LS3-powered M3 for our Top 10 Worst Cars of SEMA List).