US tuner Switzer Performance can't get enough of the Nissan GT-R
, and its latest aftermarket program, dubbed the P600 GTR PK, has given Godzilla 600 horsepower, up from the stock 545 hp. Switzer managed this modest boost in power by adding high-flow filters, its own high-performance ECU software and a free-flowing SS90 exhaust that also improves the sounds of the 3.8-liter twin-turbo V6. As a result the 0-60 time has dropped to a claimed 2.6 seconds. Make no doubt about it: that is epically fast.