I have the Southbend Stage 3 with the 19lb flywheel HD CSC and quiet disk option. There is no noticeable increase in chatter and the shop that did the install said the only snag they hit was installing the CMC which was a little more of a bear than they expected. Other than that I'm on mile 350 of break in which is great because I should have everything in for my Boosted Performance install in within the next two weeks or so.
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