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Nitrous oxide - the preferred go-fast gas of many speed freaks - delivers its substantial power boost by cooling the surrounding air, which in turn becomes denser. The denser air's higher oxygen volume feeds the hungry engine, which can now produce more power. Nitrous oxide is also widely used in the healthcare industry as an anesthetic and analgesic, so you'll find nitrous canisters in hospitals, dentists' offices and ambulance stations in addition to Paul Walker's local speed shop. British str

Granted, we're a little weird around here, but we've been dreaming of a multi-stage nitrous system since the sixth grade. We saw our friend's big brother lay down some fat rubber marks all around the cul-de-sac in his primer'd and blown '72 El Camino and BAM!, we were sold on the idea that increasing the air part of the air/fuel equation was the smart, righteous thing to do.

Click the image above to view the gassed 'Vette take on the Nissan GT-R after the jump

By 2010, all diesels sold in the U.S. will have to meet Tier 2 Bin 5 emissions levels, the same standards as their gas-powered counterparts. Even though we're used to talking about diesels as green machines, they still have the issue of nitrous oxide (NOx) emissions with which they need to overcome.

Showing yet another year of strong growth, the specialty-equipment aftermarket parts business grew by 9 percent in 2005 to end up at $34.3B. That's nearly double the size of the market ten years ago, and in each of those years, the auto aftermarket has grown at a faster rate than the US Gross Domestic Product.