Porsche launched the 911 Speedster this week, effectively a swansong for the old-gen 911 and with the 991.2 GT3’s howling 4.0-litre flat-six sitting pride of place in its rump.

It’s a stupendous engine, revving to 9,000rpm and making one of the very greatest noises on earth as it does so. As a reminder that naturally aspirated engines are often more fun than turbos, it’s as stark as they come.

Happily, Andreas Preuninger – head of Porsche’s GT-badged cars – all but confirmed this isn’t the engine’s swansong, with much of the thanks going to a clever new exhaust system. It incorporates a particulate filter, to lower the car’s emissions, but thanks to the fastidiousness of Porsche’s engineers it’s somehow gained 10bhp and lost 10kg, too.

“This is what happens when you push very good engineers to the limit,” Preuninger tells us. “It has very thin steel sheet soldering which is super light, and losing 10 kilos at the back end of the car – down low – is something you really feel.