I have had a nail go in my DR's and I put a plug in it. And it hold up great. I drive on the street all the time and cut low 1.7's on them and the plug has held for about 4 months so far so good.
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88LX 5.0,C4,3200stall,TFS stg 1 cam, ported E7's, BBK LT's, Race magnum bullets, ASP 3" pulley, 3.73's, 75hp NOS Dry Kit, Explorer intake
7.93@85 N/A 1/8th C4
7.39@90 N2O 1/8th C4
http://www.angelfire.com/ns/PurgingPony/50mainpage.html