Porsche has unveiled the new version of its hardest 911. The GT3 RS is one of our absolute favourites, an uncompromised iteration of the  sublime GT3, and that looks unlikely to change now that it’s been given the revised 997.2 treatment.

It gains the new 3.8-litre straight six engine from the standard GT3 but boasts extra power for the RS – total output is up to 444bhp, 15bhp higher than the 997.2 GT3 and 35bhp more than the outgoing RS.

It also means the new engine boasts a 118bhp per litre specific output – an impressive figure for a normally aspirated unit. Happily for the purists, it can only be ordered with a six-speed manual ‘box, the gears having a shorter transmission ratio than the stock GT3’s with a higher top speed promised. That means 315kph+ is on the cards.

Weight is cut, too, with measures as thoughtful as using a lithium ion rather than conventional lead battery to shave 10kg. There’s more downforce than a regular GT3, thanks to tweaked aerodynamics – including that rather tremendous rear wing. It’s made from carbon fibre with aluminium supports and is also far more convincing aesthetically than the new decals and orange nose detailing.

In true German performance car style there’s a number of acronyms to get your tongue around, the highlights being specially set up PASM (Porsche Active Suspension Management), which works alongside larger track widths front and rear, and PADM (Porsche Active Drivetrain Mounts), which alters the stiffness and damping of the engine’s mounts in order to tweak the car’s dynamics. In short, if you’re in maximum attack mode, the mounts stiffen to fix the drivetrain and resist movement within the bodyshell. The updated 997 GT3 RS gets its big unveil at the Frankfurt motor show on September 15. Prices are expected to start at $ 133,500.

Although Porsche Middle East is waiting on local reaction, if you place your order now, you should get your hands on Stuttgart’s track day special in January 2010.