I have a 2008.5 MS3 with 36,000 mi. the only mods i have are MSCAI and Magnaflow CBE. I would like to do the RMM next, however i read about everyone using the ones from CP-E, Trz, and the one that Street Unit sells. But i can find no info. about the Corksport inserts that sell for 38.00. I do not want any vibes, was wondering if any members have done this and what they thought about this product. Any info. would be helpful or thoughts on this subject. Thanks.