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Well I got my custom exhaust made today, and it looks and sounds awesome. I couldnt be happier with the results and I feel a huge increase is power. I have yet to install my japtix y-pipe or my UR HFC's. Currently I have the megan y-pipe on with stock cats. I have lots of pictures but they are from my phone. I will try to get a sound clip up asap, love the way the exhaust growls, and there is no rasp what so ever. I made a straight midpipe with out a resonator and got some piping welded to the muffler. I angled the tip a bit to show off the carbon fiber and I think it looks good. Also did the bumper tuck to flow with the single more.

Oh yeah I ended up going with 3" piping. Enjoy

also have my invidia N1 exhaust and megan y-pipe for sale. I loved the way this exhaust sounded also but it was time for a change.

Muffler pictures











Pictures of the piping







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I am looking to make a custom single exhaust and need some input on this project. The japtrix y-pipe goes from 2.5" piping at the HFC's and merges into a 3" pipe.

2.5" inlet


3" outlet


My question is should I go with a custom 2.5" exhaust or just got with a 3" custom. I am currently n/a and dont see myself going FI anytime in the future and have heard that 3" piping is best for those going FI. If I go with the 2.5" piping will I be losing much power going from a 3" outlet (y-pipe) to a 2.5' inlet (exhaust). Any input would be greatly appreciated.


Oh yeah the piping coming out of the muffler I believe is 75mm which is about 3" if im correct.

 

3 inch , thats what Motordyne uses and it seems to make the most power over all exhausts for NA. or just buy their exhaust.

 

i have a 2.5" to 3" y-pipe as well, using a HKS stainless steel single Hi-Power exhaust.

 

go FULL 3" or u will regret it. Heard guys 2.5" Custom Vids on here and they sound like a choking cat

 

alright well I think I will end up going with a 3 inch, unless someone has more input on this. LMK....

 

I don't own a 350 but 3" is mostly recommended for FI setups, I believe that running 3" on Na will not be sufficient back pressure could be wrong though. I personally if staying Na would run 2.5"... mandrel bent of course!

 

3 inches, unless you can get the perfect diameter for NA which is 2.85.

 

^ wtf. where do u make up these numbers.

Stick with 3''. Keep the diameter constant throughout to reduce friction. Also, changes in diameter cause rasp. When i switched to 3'' throughout, there was no more rasp! I'm running a JIC exhaust without a resonator, and those are very raspy exhausts..

 

you are

 

alright thanks for all the advise keep it coming

 

Go 3" after the Y pipe. There is absolutely no loss of power anywhere on the curve and it sounds better.

EDIT: If anything, 3" has a slight advantage power wise.

 

Alright thanks for the advise, I will have it made on monday because they have to order some 3" flanges

 

i can't wait to hear the extremely loud exhaust note.

 

 

Is this true? I currently have a 3" Jic TI non resonated single and am having 2.25 to 2.5 ichiba resonated test pipes and a 2.5 to 3" megan y pipe installed on Wednesday. I was under the impression this was the best way to go.

 

^2.5" on the Y primaries is good.

 

looks great bro get a clip u once you get the cats and ypipe on what was the total price? if you dont wanna post you can PM me thanks

 

looks good is that pipe mandrel bent. and how much was that hks can?

 

Looks good