you can look them up on all the company webpages but for the most part i think they were 32 or 36mm (cant remember off the top of my head) up front and 22mm in the back...if you want to go big...hellwig hotchkis and H&R are a few mm bigger front and back...hotchkis is hollow though...but bigger isnt always better...i went with steeda because thats what my girlfriend bought me for my birthday
The stock GT and GT500 use a 34mm front bar. Whitelines front bar is 32mm sounds wrong to me. The S197 GT has a nominally 20mm rear bar and GT500's have 24mm rear bars.