While many air-intake systems are available for the popular 4.0L-equipped Jeep Wrangler, none offers the unique design of the Spectre Performance intake system. The Spectre kit offers an ...

All of the cold-air kits we tested made more power than our baseline, so there's really no bad choice when it comes to this modification. Introducing cold intake air into the engine not only makes ...

Just prior to this story, our resident '67 Mustang had received a set of full-length headers. While headers helped the engine make power, they also increased underhood temperatures considerably. Those ...