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Originally Posted by Alpina_B3_Lux
The Alpina B3 BT always uses the N54, not the N55 engine. You cannot extract that much power from the N55 with its single twinscroll turbocharger.
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Thanks for the info. However, I am sure with the proper modifications an N55 could make 408hp. After all, the N20 with single twin scroll can make almost 300hp, or 150hp/L.
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And of course any Alpina car retains the full BMW warranty. They're produced in BMW factories anyway.
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Right, although sometimes limited production vehicles like this are sold with no warranty. But since you've pointed out that it is just a B3 S with some further upgrades, it makes sense it will have a warranty as well.