View Single Post
      10-08-2012, 02:03 PM   #9
Vintage
Colonel
Vintage's Avatar
United_States
378
Rep
2,588
Posts

Drives: BMW G80 (MT), 718 Spyder
Join Date: Aug 2009
Location: Austin, Texas

iTrader: (0)

there are two sets of stock cats on the OEM exhaust. one set on the Down Pipes (or DPs as everyone calls them) and another second set midway back. if you buy Eisenmann the whole system is replaced up to the DPs, so you would still have the OEM DP cats minus the mid cats. that is my long way of saying that simply cutting out the mid cats should be a good sound improvement and a little bit of a performance boost too. now do the golf tee modification to hold open the second muffler bypass all the time and you are set!!!
Appreciate 0