*SL65, CL65, S65 AMG
For the 6.0-liter AMG V12, Kleemann has a software upgrade that adds 127 hp and 222 lb-ft to the car's already incredible output. The extra grunt comes in the midrange from 2000 to 4000 rpm. Contact the manufacturer for pricing.
*Mini Cooper S
Evosport has teamed up with Powerchip to offer a software upgrade in conjunction with a high-boost supercharger pulley. The combo increases peak horsepower by a reported 32 hp and torque by 29 lb-ft. $690
Increase boost brings increased demand on OEM intercooler systems. To remedy this, Forge Motorsport has developed a direct bolt-on intercooler claimed to be 29 percent more efficient, giving a consistent and uniform power curve. $740
Dinan's S2 package comes complete with enough goodies to bring the vehicle up to 205 hp at 7000 rpm and 180 lb-ft torque at 4500 rpm. A stage three suspension upgrade is also included, plus a decklid spoiler. $4,880
*Porsche Cayman S
TechArt, distributed by CEC, offers three power upgrades for the Cayman S. The first, Power Kit TA 087S/C1, recalibrates the ECU and adds a sport air filter. Peak power is increased to a claimed 310 hp. $3,750
TechArt's Power Kits 2 and 3 start with a complete engine overhaul. Displacement goes up from 3.4 to either 3.6 or 3.8 liters. Both upgrades include new intake and exhaust manifolds, sport airbox and an exhaust system. New engine software is included. Power Kit 2 (3.6-liter) produces a claimed output of 340 hp and Power Kit 3 (3.8-liter) produces a reported 370 hp. Contact the manufacturer for pricing.
*Porsche Cayenne Turbo
Several companies, including GIAC, Neuspeed and Revo Technik, make software upgrades for this twin-turbo monster. Gains are a claimed 40 to 50 hp, while torque is amplified by 50 to 60 lb-ft. Some manufacturers offer devices that can switch between stock and modified settings. $999-$2,750
Evolution Motorsports has a turbo upgrade consisting of a pair of custom Garrett GT turbochargers. Used in conjunction with a turbo-back exhaust, this mod is capable of producing reported gains of up to 650 hp. Contact the manufacturer for pricing.
*Porsche 911 (993)
GIAC carries DME performance software for this application that will increase power output between 45 and 60 hp, and raise torque by 45 to 60 lb-ft. The software not only increases power at full throttle, but also improves driveability. $2,500
AWE Tuning has a turbo upgrade derived from the European-spec 993 GT2. The K24 turbos are capable of enhancing output of the 993 Turbo by a claimed 24 percent. The kit also includes custom headers and mufflers. A claimed increase of up to 98 hp at the wheels can be realized. Contact the manufacturer for pricing.
*Porsche 911 (996 3.6L, 2002-05)
Evolution Motorsports, in conjunction with VF Engineering and GIAC, offers a supercharger system that could rival a stock 996 Turbo. Using an intercooled Vortech V2 centrifugal blower running at 5 psi, the kit produces a claimed 470 hp and 360 lb-ft torque from 5000 to 6800 rpm. $11,000
*Porsche 911 (996 3.4L, 1999-2002)
Evolution Motorsports carries a 6 psi supercharger, but due to the decreased displacement on the early Carrera 2 (3.4 as opposed to 3.6 liters), the kit `only' produces a reported peak of 420 hp and torque 340 lb-ft from 5000 to 6800 rpm. $9,995
*Porsche 911 Turbo/GT2 (996, 2001-05)
Several tuners offer software upgrades, including APR, GIAC and Revo Technik, with average gains of around 50 to 75 hp and 80 to 90 lb-ft of torque. $1,699-$3,999
For the K16-equipped 911 Turbo, AWE Tuning offers a K24 turbo upgrade kit capable of producing peak power of around 600 hp. The kit includes a pair of K24 turbos, 100/300-cell turbo-back exhaust, air filter, and a pair of Baileys diverter valves. $9,995
For power is well beyond 600 hp, contact Evolution Motorsports. The company offers upgrades that can push power output from 640 hp all the way up to 900, and there are even rumors of a 1080-hp upgrade in the works. Contact the manufacturer for pricing.