So I've been trying to decide on getting the kenetix manifold or the MREV. So far the MREV seems to be the more popular choice so I'm just looking for some opinions from the more seasoned veterans on here! Also if anybody has any good suggestions for a good HR Y-pipe for my 2007 coupe, that'd be awesome!

 

If you have the rev-up engine then the MREV2 paired with a plenum spacer will be your best bet. The SSV is pretty but offers little to no gains on a NA motor, it has been shown to make power on FI motors though. And the OEM HR y pipe is a good choice since it's inner diameter matches the rest of the stock exhaust.