I think DC is pulling the wool in several different directions here:
Most of what's listed here is easily emissions compatable. With computer controls on final fuel allotment, what comes out of the tailpipe is easily controled.
DC waited for after market to design and build much of this and then performed their own "testing" for genuine DC parts. In 70's muscle cars, all Chrysler six-pack engines used straight from the box Edelbrock intakes. Also if the market didn't develope, they had spent nothing.
Warranty? Why warranty something when people will still buy it knowing it "voids" the warranty? DC is having their cake and eating it too! Most of the current power drop offs (boost and fuel) occurr when shifting. This isn't to make you want more (or what the engine's really capable of). This is to reduce drivetrain (transmission) stress at its most vulunerable time. A few people will complain and get repairs under warranty, but most will give up after enough hassles and DC counts on this in the bottom line profit margin.
This may not be correct by the laws or by written coverages, but this is what happens, and will happen, in the real world and they know it!
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