7 One way to give your project some muscle is a nice dual-exhaust system. Besides giving your ride a sweet note from the tailpipes, you'll be picking up a few horsepower as well. For daily drivers where drone is a concern, be sure to choose your mufflers wisely and use a cross-over. For drag and track cars, be cognizant of your track's dB requirements and ensure you are in compliance. Finding sound clips on the Internet of similar cars/powerplants with various mufflers can help you decide which ones are right for you.