TORX Socket size to remove carb studs on B&S ?

I need to know what size TORX socket to remove the carb studs on the newer model B&S engines such as there own brand Storm Defender Generator. I don't won't to buy a whole set ...just the size I need... it is smaller then the E8....could be somewhere around an E4 or E5 ?

Thanks,
Phil:dunno: