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Originally Posted by PrematureApex
Tires, lowering, and good shocks certainly improve handling a ton. Drives much more like the 335 hatch that it is.
You'll find the "off road use only" labels generally applies to exhaust components that remove cats. The tunes don't override or effect any emissions systems. They are street legal, perhaps except for CA.
But sure, if you're making more power, you're polluting more. But that doesn't make much sense, as if you're using any more throttle than you absolutely have to while driving, you're polluting more. And as you said, you already bought a heavy turbocharged car, so you could have done better in that regard.
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I have seen tunes, perhaps for other cars, which specifically state for off-road use only, even though no emissions parts are removed. Keep in mind that only the factory tune is used to pass EPA regulations, and it's more than CO2 that is a concern. Just ask VW about their TDI emissions. If a tune didn't matter, they wouldn't be paying for 100s of thousands of cars.
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If you think you're car is fast...you should get a ride in a tuned N55.  And that's not even a "fast" car by today's standards.
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Well, there's fast, and then there's fast. It's faster than most cars on the road, even though the bar has been raised over the years. Ok, it's not faster than a new GTI, Camaro, Mustang, etc., but I'm not sure it's so far away at least from the GTI.
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But anyway, yeah, lots of improvement to be had on the handling front. The skidpad numbers are primarily a product of tire choice though...so if all you're looking for is more lateral grip, start there for sure.
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Definitely! Might even help you go faster, for those of us without the AWD.
