M45 exhaust

[dspratley]

I am thinking of swaping out the stock mufflers for borlas, has anybody done this, who knows the inlet diameter?

I see a lot pf people use the Megan replacement mufflers, how do they sound?

Modified by dspratley at 6:15 PM 4/8/2009
Modified by dspratley at 6:41 PM 4/8/2009

[tigerclaws1318]

I am thinking of swaping out the stock mufflers for borlas, has anybody done this, who knows the inlet diameter?

I see a lot pf people use the Megan replacement mufflers, how do they sound?

Modified by dspratley at 6:15 PM 4/8/2009

Modified by dspratley at 6:41 PM 4/8/2009

I see you are in jamaica which isnt far from me. lolI do have the megan axle backs on my M45 and have sound clips if your interested.

[COinfinitM45]

I am interested. Please post them

[M4T5]

I would recommend you doing a full cat-back system rather than hacking up the factory cat-back system.The Megan or Stillen cat-back system should please you fine.Doing it this way will allow you to store your factory exhaust system to place it back on when you go to sell or trade it in. Just a recommendation.

J

[Bobg13]

Has anyone had any experiences dealing with an '03 - '04 exhaust modification. I have just purchased an '03 and my first few inquiries to local shops has been fruitless. I have checked on multiple manufacturers sites and none seem to have a replacement system that I can see?? Any suggestions from other early model owners would be appreciated.

[nmgoodthing]

You will need a custom one made. I had my fabricated and am very happy with it. You will have to go Y pipe on back and depending on your muffler it will be pretty aggressive due to resonator deletes, so make sure that is what you want before you drop coin to do it. I love mine. It's throaty, no drone, and once broken in I got better gas millage and more power.

[ken in az]

You will need a custom one made. I had my fabricated and am very happy with it. You will have to go Y pipe on back and depending on your muffler it will be pretty aggressive due to resonator deletes, so make sure that is what you want before you drop coin to do it. I love mine. It's throaty, no drone, and once broken in I got better gas millage and more power.

Everyone knows it's impossible to increase the performance of your car just by adding an exhaust! Infiniti engineered the factory system with millions of dollars to make the exhaust the best ever. It is fruitless to try to get more power and you'd be a fool to try. To think some muffler shop guy knows more than infiniti.

[nmgoodthing]

Thank god my sarcasm radar is on.

In short, I live at 5300ft altitude. Our cars choke up here and before I had the exhaust done I ran a 15.6 @ 91 in the 1/4 in my loaded 4200lb y34.

Few weeks ago I ran 15.03 @ 95. That's a pretty good improvement if you ask me. If it wasn't my daily I'd throw twin snails on the b****, bu that is what my Z is for.

[ken in az]

Thank god my sarcasm radar is on.

In short, I live at 5300ft altitude. Our cars choke up here and before I had the exhaust done I ran a 15.6 @ 91 in the 1/4 in my loaded 4200lb y34.

Few weeks ago I ran 15.03 @ 95. That's a pretty good improvement if you ask me. If it wasn't my daily I'd throw twin snails on the b****, bu that is what my Z is for.

Altitude kills - only replacement is boost. It can still be a daily with a snail in the back. Or two snails beside the trans - well that'd be tight. Running 4-5lbs intercooled with an UpRev tune and add a VB shift kit and it would still be just as reliable as stock. 4-5lbs is really nothing and will increase output to close to 350-380rwhp.

[gigatt]

I agree with you Ken, that sound of the M's sweet, especially when you open the windows and throttle down some, you will love it, the only thing I was thinking of doing is at least cut off the tips which are junk IMO, want to do some like the 07/08 Maxima, bigger diameter and chrome as opposed to that finish on the M's.If I decide to do exhaust later, it will probably be some not too loud but more deep, if someone has some good clips, let us hear 'em.

[ken in az]

Thank god my sarcasm radar is on.

In short, I live at 5300ft altitude. Our cars choke up here and before I had the exhaust done I ran a 15.6 @ 91 in the 1/4 in my loaded 4200lb y34.

Few weeks ago I ran 15.03 @ 95. That's a pretty good improvement if you ask me. If it wasn't my daily I'd throw twin snails on the b****, bu that is what my Z is for.

Wow, I just re-read your improved time, that is quite a gain! That's like 30hp! For the first run you must have had a serious headwind and a knarley low pressure system going on that day at the track. But non the less, it is an improvement!

[nmgoodthing]

I don't know what the DA was that day but I have ran my car at the track at least 10 times before the new exhaust and it was pretty consistent mid high 15's. Air condition was on and stock air filter.

This last run was with taking the air filter out for the run and AC off. I was surprised myself. I'm curious what would happen with a tune with some more air thrown in the mix. The poor 350Z that was trying to catch me that day was like WTF?