More power than Audi RS3 but its a Ford Focus ST

What happens when you spend £11,000 on modifications for a 2009 Ford Focus ? With more power than an Audi RS4, Ford Focus RS and even an Mercedes A45S AMG could this HEAVILY modified Ford Focus ST have too much power.
List of changes to the car
2009 Facelift Focus ST in colorado red.
Fully forged engine with wiseco pistons and K1 Rods, built by Devil Developments,RS clutch, Quaife Diff, RS Turbo, and 750cc Injectors.
RS cams with RS crossover pipe, maf sensor and software.
Short shift
AS peformance 340Lph uprated fuel pump, with AS inlet Plenum in Red, RS stage 3 Airtec intercooler with large pipe upgrade, AS peformance carbon induction kit with K&N air filter.
Bilstein B16 pss9 Ride Height and damping coilovers
Mongoose 3 inch downpipe with Cobra Vemom fully stainless steel 3 inch exhaust with DeCat.
Full front brake upgrade with 4 pot Hi Spec monster 4 conversion kit and DS 2500 pads.
REVO Stage 4+ Software currently running 420.5 BHP with 455 ftlb torque,
Damo Drives
Subscribe: www.youtube.co...
Instagram: / damodrives
FaceBook: / damodrives
TikTok: www.tiktok.com/damodrives
Twitter: www.Twitter.com/DamoDrives