can someone tell me why i change my Y-pipe (the stock one) and keep the mufflers that i have
what will be the gain ? less RASP (stock with HFC is Little raspy)
or HP gain ?

and Q to tony or any one know about MD xyz pipe :
how is it with the stock exhaust ? sound and gain ?
and with the setup that i have will it end the RASP ?
and any videos

 

I have resonated test pipes and the XYZ pipe w/ resonated section right now. I also have the stock y-pipe back exhaust (waiting on the VQ from Motordyne). There is very-very little if any rasp with this setup. The XYZ is an excellent y-pipe and the sound is perfect. As far as gains go, look at the Motordyne web page. I did not do a before/after dyno so I can't chime in. As soon as the VQ comes in I'll do a before/after comparison with all stock vs. all Motordyne....and of course, same day, same dyno, same relfash prior to each.

 

thats good news ,thanks

 

Why you asking us that why you change your y-pipe, ask yourself.

Edit:Here is MD xyz pipe info. There is vid clips and all the good info about xyz pipe.

https://my350z.com/forum/intake-exha...roduction.html

 

i m asking not because there is somthing wrong with main ,,what i meen why some people change to xyz or JIC ,,,,, thats it

 

People switch to aftermarket y-pipes to benefit from an improved design. A good y-pipe will merge at the optimum point; the point where the most horsepower can be yielded.

Also people will switch y-pipes to match proper inner diameters of the exhaust pipes. IMO, matching the inner diameters of the exhaust pipes is important. Going from a wider pipe into a narrow pipe will result in exhaust gases being interrupted by the transition from a wider diameter to a narrower one. It will also sound bad.

A good match of diameters, for example, my Nismo exhaust and Berk HFCs.

My Berk cats inner diameter (~2.25"):



My Nismo y-pipe inner diameter (~2.25"):

 

Much better air flow (designed/bigger pipe), most of aftermarket Y-pipe has 2.5 inlet/3" outlet size. I replaced nismo y-pipe to AAM y-pipe, you can see outside thru pipe ( that make sense?? oh my poor english).

But you need to replace exhaust system for better airflow/power, i do believe just a hfc/y-pipe won't do much untill you replace exhaust system.

 

https://my350z.com/forum/intake-exha...-benefits.html

 

gsingh350Z & xhooniex83 ,,,thank you guys that was very helpfull

for changing the whole exhaust system ,, i just came back to the stock exhaust (i used to run APS 2.5" TD) because of the loss lowend power and the drone kills me although not that high but i hate it , i`ll take my time to go back to aftermarket exhaust again (i hope ther will be one with three NO`s and one Yes) :
NO Loss power
NO RASP (with HFC ,,well i love this mod)
NO Drone
YES Power Gain (i know not much but not lossing at least)
let`s hope ( nismo & Bassani are the most complet but looking for perfict if ther is ) please if i`m wrong about them let me know.

edit : ooh , i just found a thread telling bassani + HFC too much rasp
still hopping

 

2.5 TD is too big size. Go with smaller size.

Me/gsingh350Z we owned nismo.

 

Because a after market Y-pipe is more pretty.