Under full throttle blasts, they can push a little oily vapor, but nothing like a cloud of smoke or anything.
The tubes have an insert with 4 thin disks welded to a center shaft. Each disk has 3...

Here are a few pics from the archive :)

40225

40226

40227

How fresh is the 0.030 bore and hone on you 4-bolt LT1 block?
I live in League City, might be interested.

Well, I have owned my 1995 Sebring Silver Z28 since new. I ordered it in late ‘94. Anyway, I landed a job which provided a company car and the mods to Z28 began in earnest! The car has had 4-5 sets...