The Toyota 86 and Subaru BRZ have been with us since 2012, with not much in the way of power upgrades, but the aftermarket has gone crazy with solutions for the power-hangry demographic.

Reasons for not providing factory turbocharged, supercharged or bigger-engined options stem from the philosophy of perfect balance and an easily-accessible grip threshold, as well as the purity of a naturally aspirated engine. That hasn’t stopped all manner of conversions including 1JZ, 2JZ, Ferrari V8s, 1GZ V12s and more.

This one found on the streets of Monaco has a distinct rumble to it, which is lumpier than a week-old bowl of porridge. The source of that thunder? 6.2-litres of the General’s finest, in the form of an LS3. Not just any LS3, but one tuned to 426kW and a stonking 900Nm.

It has looks to match its newfound power too, with a wide-body aero kit, TVR Sagaris-style bonnet ventilation, a large integrated bootlid spoiler, side skirts and deep-dish 19-inch alloys wrapped in fat tyres. The car is registered in the Czech republic and is said to have been completed by Brill Steel Motorsport.

Monaco is famous for its gold-wrapped exotics and the elite of the hypercar world, but in that company, this beefy little number certainly doesn’t embarrass itself.

Fans of the regular, four-cylinder 86 can take solace in strong rumours that indicate Subaru and Toyota will be back again in the next few years for a second-generation. Indications of a capacity increase to 2.4-litres, a mild-hybrid system and a semi-automatic transmission have been flying around, but we will have to wait and see if any of these come to fruition, or, indeed if the car does.

What do you think of this matte-grey, LS3-powered Subaru BRZ? Tell us your thoughts in the comments section below.

Eccentric car nut, just as enthused by roasting an egg on the air cleaner of an old Hemi as I am hunting the horizon in a space age electric supercar. Dropped on head at young age, which gave me a meticulous automotive obsesseion for obscure facts.