Flywheel
sorry, i should have said scattershield.. they are also referred to as blowproof bellhousings...if your building any kinda power and you plan on revving it and driving hard (not like your grandma) id step up to a billet steel wheel (or aluminum if the cash is there and the setup can benefit from it) and a scattershield...you dont want the exploded flywheel or clutch cutting your floor or your legs...cheap insurance imo...dont think id ever run any stick car without one, even a mild one...its not worth it imo