Tuners just can't get enough of the 997 Turbo, with a list so far including SpeedART, TechArt, Edo, Rinspeed, and 9ff. That latter tuner even rings three bells by winning the HP competition, the top speed run, and being a convertible. The Swiss modifier fiddles with the ECU, swaps out the stock turbos for its own units, installs a high-flow exhaust, new air filter, and a strengthened clutch. Sportech also adds hi-po brakes with 6-pot calipers, a sports suspension, and a new front spoiler and rear wing -- and some hot wheels. Then it tunes the entire thing in four stages: from a 530-hp Stage 1 package to a 580-hp Stage 4 time-bender that digs holes in the road with 564-lb-ft of torque. Top speed is 210 mph. We never complain about anyone who adds to the already fantastic 997 Turbo, but in such a crowded and nandrolone-infused field, this latest entrant could sound, well, excuse us for saying so, but... tame.

[Source: Motor Authority]