What is it?
Meet Lexus's answer to the BMW M3. Like its German rival, the IS-F has had a V8 engine shoe-horned under its bonnet, although in this case one with 5.0-litres of displacement and with drive dispatched to the rear wheels via an extremely clever eight-speed gearbox.
Despite the extra capacity, the F's 417bhp is almost identical to that of the M3's higher-revving 4.0-litre motor, but it has far more torque to call on - 372lbft against the BMW's slightly anaemic 295lbft.
What's it like?
Pretty impressive. Indeed, if you were about to sign an order form for the new M3 it might be worth waiting three months to have a go in the IS-F.
The engine is a work of art, lacking much urgency at lower revs but waking up at around 2500rpm, and then pulling with increasing vigour to the 6600rpm at which peak power arrives.
Despite sharing an identical 4.8 second official 0-62 mph time with the M3, the IS-F feels subjectively quicker off the line, thanks in large part to an amazingly vocal V8 soundtrack.