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We are enthusiasts of unconventional engine swaps—it’s common knowledge among us. From a Hellcat-swapped Miata to a Chevrolet Impala donk fitted with a 2JZ, there are no strict guidelines to adhere to, and for those of us with a fondness for altered metal and speeding violations, that only sweetens the deal. Some prefer the rough, industrial look with superchargers peering out from the hood (as seen in the Miata example above), while others opt for a sleek and tidy appearance. However, this does not diminish their prowess, as evidenced by this impeccably smooth Buick Regal, now featuring a unique transplant from across the pond.
WhitelegacyGuy, a YouTube user, spearheads this fusion of domestic and imported technology, replacing the former GM-manufactured power source with a 5.5-liter Mercedes V12. Besides raising the cylinder count and displacing the engine further, the new German powerplant also integrates twin Precision turbos generating 24 pounds of boost.
The individual took apart the original powertrain of the Buick Regal Turbo-T Limited, initiating the installation of a Mercedes-Benz M275 V12, sourced from a 2005 SL600. Although exact power figures are not provided, the engine initially delivered 500+ horsepower, with the dual PTE 6266 turbos undoubtedly elevating this figure. The expected increase in torque from the existing powerhouse of a 12-cylinder is simply mind-boggling. An MS3Pro ECU now governs the powerplant, which undeniably still consumes fuel at a rapid pace akin to a rocket.
A Mercedes-Benz five-speed automatic transmission has the responsibility of transmitting this immense power to the rear wheels, which are complemented by stylish Weld Racing rims.
To enhance safety for the owner, the Buick has been equipped with enhanced braking capabilities. The front rotors have been sourced from a C6 Corvette Z06, paired with eight-cylinder AMG calipers for effective stopping power.
Below are snippets showcasing the building process:
For those adhering strictly to tradition (after all, no engine replacement is), this change offers a refreshing pause from the multitude of LS engines commonly installed in vintage vehicles every single day—though substituting those is equally acceptable.
Source: Motor1
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