I dusted a Boxster S in my Mazda 6 Sedan on an empty expresway once. Suprised the hell out of the guy driving the "respected" Porsche brand as he tried like mad to catch me. Porsches make terrible dragsters. He learned quickly to respect the Zoom Zoom Zoom.
Even beat the pants off a bunch of Boxsters this past weekend in the Mazda 6 at an AX and couple of them were on race tires. ...I dont know, Boxsters seem fairly slow to me? Only Boxster that really gave me trouble was a fast 3.4 conversion car on big fat DOT race tires. I was on skinny street tires in a 3600 lb sedan.
My tip to you is to not race well made Japanese cars as you'll likely lose or break your car trying to keep up.