Post by
CoupeVQ35CVT »
https://forums.nicoclub.com/coupevq35cvt-u137499.html
Thu Aug 06, 2009 3:41 pm
I have the QG18 engine powered '06 Sentra, which is basically similar to your MR18. Ok I lie! It's rated at 126 hp and 128 tq, so it's marginally more powerful.
With that said... I would strongly advise you to avoid getting an aftermarket header (if you are so thinking of doing) as you will gain pretty much nothing but a PITA from the check engine light (unless they have a legal workaround by now) and crappy rasp that sounds like a stupid fartcan wannabe. Oh and you will most likely lose low end torque (which is important to you if you like to drive like a normal person around 2-3k RPM unless you will be racing on a track).
And definitely do NOT go with 2.5" piping. That's super silly ridiculous and you will just lose power. Go with 2.0" or mayyyyybe 2.25". My Sentra has a 2.25" catback custom made by the local guy here. It doesn't seem to do anything, but lower the overall sound.
Also, I have a FlowMaster 40 series muffler which is just a drone machine ( = giant headache) so don't get one of those haha.
Intake wise, I guess it's up to you. I felt no difference at all when I put one on. Only nice feature is it made my engine sound more aggressive with that distinct growl. That's it.
DO get a resonator if your system doesn't already have one, IF you hear too much annoying rasp or your aftermarket muffler is loud.
To recap:
The MR18/QG18 aren't really built for speed, but for fuel economy. With that in mind, much like you, I went ahead and got some mods done on the cheap because it was a learning experience, and fun.
Intake (go for it)Header (if you realllllly want to)Catback (probably not necessary, but perhaps no larger than 2-2.25" tops)Axleback - go for it. If nothing else you might have a mean sounding Versa.
Another options is of course throwing $4000 at the car and hope it turns into a turbocharged sleeper.