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It's called de-tunning and has been around since PT Barnum. Every manufacturer does it (that Intel box in front of you included). There may be a little more expensive metallurgy for strength in a 3.4, but he engineerings is already there ripe for the picking. No added cost there.
It also doesn't cost $30k to change the plumbing contortions and make the pistons and valves a wee bit bigger. Again, the engineerings done.
You can ring 300+hp out of a stock Box. motor, but it gets a bit messy and porsche makes it hard (fun though). A Box motor runs stock at a very modest “bang (hp) per liter” ...down there with a Miata.
Regards, PK
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