Sure, it might cost almost USD$140,000 but this BMW Z4 has one unique feature no other Z4 has. Powered by the same 5.0-litre V10 engine that bellows beneath the bonnet of the BMW M5, this Z4 is good for 551hp.
But wait a second, that's more power than an M5, isn't it? That's right, not content with shoving a standard S85 V10 into his Z4, the owner opted for a Hartge prepped donk which is good for an extra 44hp over the stock powerplant.
A six-speed manual transmission and 20-inch Hartge wheels are the only other modifications listed but we doubt the new owner will hardly be left wanting.
By some act of God, the V10 somehow manages to fit into the engine bay looking like it was always meant to be there. Kudos.