SLP after-cat are "street legal". I live in TN, and we have to pass emission tests before you get your annual registration renewed. X-Pipes is another way to get additional hp and work great with after-cat, but just makes sure that if you replace your factor H-pipes with X-pipes, you get the ones with catalytic converters. They also offer race pipes which replaces the catalytic converters for the tracks, but again, it won't be "street legal" and pass emission.
|