Boosting your vehicle’s horsepower doesn’t always require a complete engine overhaul. With the right bolt-on upgrades, you ...

In the first part of this series (Mopar Muscle, March 2002), we were surprised with what we learned from testing Holley HP carbs and Wilson Manifolds spacers on our Slick Budget Small-Block 360. That ...

This 6061-T6 billet aluminum Silver Bullet throttle-body spacer from aFe Power is said to add 8hp to 2014 5.3L GM V8s and up to 12 lbs./ft. of torque. The serrated/helix design lengthens the intake ...

The Jeep 4.0L engine found in TJs, XJs, ZJs, and WJs is a trusty powerplant, and the '91-and-newer high-output versions make respectable power for a long time if well cared for. We recently ran across ...

Ford has given us a great playing field for performance in the all-new S550 2015-2016 Mustang V-6 and Coyote V-8 Mustang GT. Best we can tell, there are no lo-po Mustangs on Ford’s ever-exciting ...