+1 for XHP. Really opens up the AT (zf boxes only) to what they should have been from the factory. Takes literally 5 minutes if you have the cable, seems pricey but I don't regret it for a moment. Lots of discussions on here (search them) and check out the website & Facebook page. FWIW, Don't bother with stage 1 or 2, stage 3 is the only way to go.
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