Scrap this...didn't know Porsche were getting fuck all power out of their engines

Wikipedia:

The Carrera and Carrera 4 underwent revisions for model year 2002, receiving the front headlight/indicator lights which were first seen on the Turbo version two years earlier. This allowed the 911 to be more distinguishable from the Boxster. A mildly revised front fascia was also introduced, though the basic architecture remained.

A limited number (1963)of 2004 40th Anniversary Editions include a more powerful 345-horsepower engine, a standard Porsche Stability Management system (PSM), enhanced acceleration due to a mechanical rear axle differential lock, more aggressive suspension tuning. Painted GT Silver metallic, the 40th Anniversary edition of the 2004 Porsche 911 Carrera has front air cooling openings like the Porsche 911 Turbo, body-color air intake grilles, unique sill trim and an aluminum 911 logo on the engine cover, polished 18-inch wheels, and high-gloss chromed tailpipes. Other equipment on this limited production model includes a power sunroof and bi-Xenon headlights with dynamic beam angle control and lens cleaners. Inside the 40th Anniversary 911 Carrera, dark gray leather sport seats include two-stage heating, special silver metallic and aluminum interior trim and a numbered plaque on the center console. Ref: 'Autobytel.com, 2004 Porsche 911 Carrera New Car Buyer's Guide'.

Engine wise, displacement was 3.4 L and power 300 PS (221 kW), increased in 2002 to 3.6 L and 320 PS (235 kW).

It was the 997 C4S that had a 3.8 355PS engine.