BS Teile Center is a German shop that specialises in selling used Mercedes parts, particularly for AMG models. The company's latest project as part of its BSTC-Performance label takes a Mercedes-AMG GT R and loads it with parts from the Pro model. Plus, there are hefty engine mods that take the output to 891 bhp (664 kilowatts or 903 metric hp).

A stock AMG GT R has a twin-turbocharged 4.0-litre V8 making 577 bhp (430 kW), so BS Teile Center's car has a major power upgrade. The engine tweaks include swapping out the original turbochargers in favour of Weistec Engineering W.4. Their red housings add a pop of colour when the bonnet is open. The improvements also include an ARMA carbon-fibre intake, Wagner air coolers, and IPE downpipes with 200-cell sport catalytic converters.

Gallery: Mercedes-AMG GT R Pro By BSTC-Performance

There's still the seven-speed gearbox from the original AMG GT R, but BS Teile Center upgraded it, including fitting a reinforced clutch. That should help the transmission handle the massive power upgrade.

Many of the exterior tweaks take advantage of BS Teile Center's access to used AMG components. The front bumper, wing/fender flares, side skirts, rear wing, bumper, and diffuser come from a GT R Pro. The headlights and taillamps are new pieces, and the builder adds its name in a stripe along each side of the body

The 20-inch wheels with a titanium grey matte finish are also from a GT R Pro. Michelin Pilot Sport Cup 2 tyres wrap around them.

The brakes also get this treatment. The vehicle loses the gold callipers from the GT R and gets the black ones from a GT R Pro.

BS Teile Center's creation is impressive even compared to Mercedes-AMG's own GT Black Series, which sits at top of the range. Its version of the twin-turbo 4.0-litre V8 has a flat-plane crankshaft and makes 720 bhp (537 kilowatts) and 590 pound-feet (800 Newton-metres) of torque. This is enough power to hit 60 miles per hour in 3.1 seconds and a limited top speed of 202 mph (325 km/h).

The tuned GT Pro doesn't have the Black Series' aero goodies like an electronically-adjustable section of its rear wing and nine levels of selectable traction control.