In case you're not satisfied with your 997 generation Porsche 911 GT2, and you're looking at the more powerful 997 GT2 RS, the tuners at O.C.T. have a new package to give it some extra juice.

Dubbed Club Sport or aptly CS, it focuses on the 3.6 liter flat six turbocharged engine hanging over the rear axle, an Akrapovic racing exhaust system with manifolds and sport catalysts, a new ECU and modified intercoolers sourced from the GT2 RS.

O.CT. says the upgrades add 148hp (150PS) over the standard GT2 (523hp / 430PS) and 59hp (60PS) over the GT2 RS (612hp / 620PS), for a total output of 671hp (680PS) and peak torque of 880Nm (649 lb-ft).

The revised GT2 CS completes 0 to 200km/h in 8.4 seconds and from 0 to 300km/h in 21.3 seconds.

From 100 km/h to 200 km/h (62mph-124mph), the GT2 CS takes just 5.1 seconds (series GT2: 7.8 sec | RS: 5.9 sec) and from 100 km/h to 300 km/h (62mph to 186mph) 18 seconds, which is said to be 5 seconds faster than the RS.