mine does it too but i was always under the impression that it was the fidanza flywheel...maybe im hearing something else. i got the invisble turbo syndrome when i had a bad gasket between ypipe and catback a couple years back...that was cool

E0 silver #185 *3L hybrid+lots of mods DYNO(moderate tune): 205 whp/ 190ftlb http://www.cardomain.com/memberpage/449801