International SyTy Registry

GMC Syclone, Typhoon, & Sonoma GT History and Data

Mr. Syclone Update
Swede Style Test-n-Tune
Robert Pothorcki aka “Mr. Syclone”, gives us an inside view from the cockpit of his truck, currently the fastest V6 AWD Syclone (8.7@162mph) in the world. While he doesn’t comment on his speed, we all know to well he’s going into triple digits as he tears through the streets... Read more