What do you mean, specifically?
You need to have an SFI-approved scattershielf for a clutched setup on a vehicle that runs quicker than 10.99, by NHRA rules, to the best of my recollection. A flywheel (iron, aluminum or steel) or the pressure ring in a pressure plate, when enough heat is built into said piece that it gives up the ghost, is an extremely violent event when it explodes (and generally you're talking about in highly elevated engine speed situations). I've seen in stock aluminum bell'ed incidents pieces of the pressure ring blow through the bellhousing, penetrate through the firewall/floorboard and lodge into the underside dashboard structure...as well as completely blow the bellhousing apart and break the back of the engine block off (where the bellhousing bolts to the block).
For an automatic setup, you need a flexplate shield at 10.99 and quicker. I think the most readily available/easiest options in that aspect are the bolt-on steel flexplate shields like sold by Hughes Performance...I say this because of the C6's integrated bellhousing. I think a couple of companies make SFI-approved bellhousings for the C6 but require the stock bell to be cut off and the case be machined so that the aftermarket bellhousings can be bolted on. At 9.99 and quicker with an automatic setup, you need the flexplate shield AND a trans blank or diaper to help contain "stuff" if you were to suffer a catastrophic failure of the transmission assembly.
Last edited by Zac; 04-23-2012 at 10:27 AM.