Several aftermarket manufacturers sell engine intake air filters that they claim provide better airflow and increase a car’s horsepower and acceleration as a result. Some of these companies have many ...

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?

The purpose of a cold-air intake is to find cold air in an otherwise hot under-hood environment. It can do this by drawing air from above the hood, under the front bumper or a spot inside the engine ...

If you drive a car with an internal combustion engine, which is most modern vehicles that run on fossil fuels, then your engine requires a precise combination of fuel and oxygen to function properly.

Q: During my car's last routine service, the workshop replaced the air filter. It was the first time the air filter had been replaced. What does this filter do and is it necessary to replace it? Also, ...

Regular readers will recall last month's testing of two Motordyne bolt-ons that successfully proved Helmholtz resonance can be used to increase exhaust gas scavenging and help your ride put out a few ...

Cold Air Intakes (CAIs) are among the most popular modifications enthusiasts make to their cars. Of course, like anything popular, there’s a fair bit of discourse surrounding them. Claims range from ...

One of the first modifications many enthusiasts make to their ride is adding a cold-air intake. This replaces the stock intake, a complex, convoluted contraption of pipes and baffles that keep the ...