you can but you wont get enough power to notice a thing also your car will run lean, if you get a tune then you will benefit from the MERV2

 

Wat do u mean by "running lean"?
and with a tune would the mrev2 really make much of a difference?

 

Why would the fact that it's a 5AT have any bearing on the change in fuel/air ratio? I just wonder because I've ready probably 50 threads in searching about it and have never heard anything like this. I've got an '07 sedan w/ a 5AT and was considering doing the MREV2 + 5/16 too so insight would be appreciated.

Obviously a tune would fix this problem even if it did exist but are any and all bolt-ons for the '07+ sedan going to give 0 gains without a tune? My problem is I don't have any place with a dyno anywhere around here so I'm going to have a hell of a time getting a tune.

 

Sayin that your A/F ratio will be off and your SES will come on possibly...I have the MREV2 on my 05 5AT and had no problems...Ive read that ADDING THE 5/16 in combo will make you run lean w/o a tune