When Dodge introduced the Hellcat twins, it was hard to imagine a muscle car and a four-door sedan with seating for five with 707 horsepower and 650 lb-ft (881 Nm) of torque. But whereas power is ...

Come on, we've all done it ... you know, making engine noises as a kid. Only, well, some of us still do it—yep, guilty as charged. The difference these days is that now we can follow through and get ...

These are the most common sizes and shapes of the XR-1 mufflers. The oval is the most popular for street cars because it doesn't hang down as far as the others and has more packing material. After all ...