Or, there is a guy on e-bay that sells the pipes already modified. http://cgi.ebay.com/ebaymotors/ws/eBayIS..._Pr3_PcY_BID_IT
I had him drill an extra hole in the plates for me. (He will know what your talking about) and mine sound great! Usually he only drills 2 holes. I am very very happy I did not drop the cheese on Epco's now.
Also, I did not need to re-jet. Snorkels are pulled and AI's are removed on my 06 TBA.
Enjoy..

06BA,-AI,NoBfls,K&NPods,TBS,155/45,2 3/4Out,SidGapPlgs,Wirsnbrs NawImPrityFknFarFrmOkMan