Modifying an older Pontiac is often like painting a house. The large surface areas go very quickly, and then you get mired in the trim and wood work. When swapping or upgrading components, they often ...

If you've ever modified a car with smaller or larger tires or, perhaps, a different final-drive gear, you've immediately screwed up your speedometer. This is, of course, annoying, but for modern cars ...

Slamming your truck to get it in the weeds on low-pro rubber or jacking it up for big, knobby meats will throw your speedometer out of whack. Most custom-truck builders know this, but few do anything ...

The Truspeed Unit Is Easily Installed In Less Than An Hour And Even Easier To Calibrate. Our math skills have improved over the years as aftermarket tire size offerings have increased. The 35s look ...