For a little quick tech, we are going to install a set of Eddie Motorsports (EMS) billet trunk hinges into a '66 Chevelle. The hinges start out as a solid chunk ...

Add a Door Spring Opener Adding a butterfly door spring opener to a hinge or two helps a door stay open for about $10 for a pack of three springs.

If the self-closing door to your garage isn’t closing hard enough to latch properly or the door slams shut, you can adjust the spring hinge tension with a hex wrench and pliers.