One piece of car maintenance that often gets overlooked is changing the air filter. Owning a truly thankless job, this piece of equipment is responsible for keeping the air entering your car's engine ...

Each of the intakes we installed provided a marginal horsepower upgrade over the stock setup that scored 309 hp at the rear wheels (see the chart). From our testing it appears that improving airflow ...

While the OEMs overwhelmingly opt for paper air filters, cotton gauze filters are a staple of aftermarket induction systems. So what makes the cotton gauze medium so much more conducive to airflow?