Aerospace startup Boom says they've proven quiet supersonic flight is possible with their passenger airplanes after a ...

make your brakes stop better, and much more. HOT ROD will also let you know about the latest products and trends in the DIY muscle car building arena.

Finally, make sure to dispose of old filters responsibly to minimize environmental impact. DIY car maintenance can be both cost-effective—saving on labor fees and time—and empowering ...