Quick Mods to Throw at Your C4 to Keep Respectable Performance
Most older C4s can be opened up a bit and benefit from the horsepower that was robbed from them in the factory back in the day.
Well just a free mod you can do to your air box. Invloves cutting a massive hole in the box so more air can come through it. Seems to me like it does nothing except allow air to enter easily but I don\’t know if it allows MORE air to come in. Well install is […] More »