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The twin-turbo 4.4-litre V8 S63 engine from BMW has long been a tuner favourite, appearing in numerous models. German tuning expert G-Power has spent years enhancing the M engine, unlocking staggering power levels beyond its impressive stock output. A recent dyno test highlights an M8 Competition Coupe with the potent GP-820 kit.
G-Power used software optimisation to fine-tune the V8 engine to generate 820 hp and 1,000 Nm (737 lb-ft) of torque. They also offer a robust GP-900 package, including turbocharger upgrades, pushing the V8 to 900 hp. While 820 hp may seem excessive to some, power enthusiasts will never be satisfied. The ultimate setup, the Hurricane RR kit, boasts a massive 1,100 hp.
As BMW gradually phases out the beloved S63 engine, the stage is set for the mild-hybrid S68 to take its place. Already gracing various models, the S68 may not be more powerful, but it boasts enhanced efficiency through its mild-hybrid design. Tuning enthusiasts eagerly await the chance to work their magic on M’s latest masterpiece, a twin-turbo 4.4-litre V8 akin to its forerunner.
The BMW M8 Coupe fastened to the dyno also had further improvements, such as a forged carbon fibre hood with several vents and a unique exhaust with new downpipes. The OEM wheels were removed, and G-Power replaced them with forged, multi-spoke, 21-inch alloy wheels. The quick coupe now has a sizable wing in the back, which is the most evident alteration.
The 8 Series Coupe reportedly won’t see a third generation since BMW only plans to keep the Gran Coupe as an all-electric model and eliminate the coupe and convertible. Even if the reports are true, it will be a few years before that occurs.
