why bother when the N54 is a direct mechanical fit? with a port injection adapter, upgraded in-tank pump, and a single turbo conversion with a fat FMIC they put down a conservative 600whp all day long…. and way more on corn juice or if you spring for a 5-axis VAC Motorsports head to spin it up damn near to 8000rpm.
BMW tuners have come a long way with cracked DMEs and custom tunes. 2JZ is an inferior option and wildly more expensive than an N54 from LKQ… they came in hundreds of thousands of BMWs over the past decade+.