We don't know what's hiding under your hood or how it breathes, but if you're like many Chevy 305 owners, your engine has asthma. While you may think it is ready for the glue factory, there is still hope. We've all seen the commercials on TV where someone is huffing and puffing trying to blow out a match, but they can't, because they can't breathe. There are a lot of engines that run just like that and could stand to use a little life-giving breath. The best way to do this without supercharging your engine is to go with a cold air intake. Simply bringing in air from the hood or up in front of the car can save a suffocating engine and add new power. The easiest way we found was to go with K&N filters (800/760-5319, www.knfilters.com). Take a look at its Web site and see what's available for your ride. You can also call them and see which kit best suits your needs. With a cold air intake on your car running at highway speeds, it's like having a blower. The compressed air being forced in at highway speeds definitely gives you better detonation.