Post by
Cwickenstein »
https://forums.nicoclub.com/cwickenstein-u274973.html
Tue Oct 24, 2017 3:07 pm
Same here. My mufflers were damaged before I got my '11. I can't find any specs on the sizes, etc. for the exhaust system. Do you have any idea of the inlet/outlet diameter of the resonators behind the cats? I have a cheap muffler shop nearby with an option of going full 3" cat-back (res delete) but in all honesty, the resonators do very little to restrict power and I believe Infiniti worked specifically to get a particular, unique sound when they developed the resonators. I don't need it to be louder in the cab anyway. I did however check out a few tech examples of 2.5" vs 3" pipes. The 3" pipes performed better than the 2.5", which I believe is the stock piping. The new mufflers I'm getting have 3" inlets/4" out. I'm in CA and to get a CARB official stamp on a set of headers is ridiculously higher than other states & not in my budget. PostalsQ - I have had headers on other cars and there is a noticeable improvement. How are they working out on your Q70? (That's the M version of the Q, correct?)
Again, I can't seem to find any specifics so any help would be greatly appreciated!
Thanks for all the tips and ideas!