Hmm, thats odd. they should mount right on to the OEM midpipes. The SS reps should fit exact no work needed. now the GEN3's I don't know.. hmm. Just take it to a muffler/welding shop and they'll fix it cheap!
2007 BMW 335i FBO 6MT - Current
2013 Nissan Nismo 370Z - Current
2004 Non-M Facelift Coupe - SOLD
2006 BMW M3 - SOLD