Originally Posted by HarKonnenD
Yeah some guys said at the cost of those kits they'd rather just run 8th onroad. However I like the longevity of the .15BB. They'd outlast the .12s and or .21s too many said.
Yep, a 15 BB will outlast both a .12 and a .21. Its basically a .15 P/S inside a .21 case. Lots more material for cooling and less stress. A nicely tuned .15BB will run for ever and a day and still put in collosal lap times.