Just curious, how much of a negative effect would there be if one were to bolt up the JIC Y-pipe to the stock 65mm oem midpipe and just left it as so? Would the addition of the JIC Y-pipe give lesser gains than if a transition tube were to be put in? Or would it be so negative that no gains to a loss would occur? I know this would have to be tested but wanted to see what your educated guess would be.

 

This is my educated guess. The dyno for the Japtrix Y-Pipe + B-Pipe connected to the stock muffler gave +11 Hp and TQ over stock. The dyno for the B-Pipe alone showed a 5 HP over stock. So I will assume that the aftermarket Y-Pipe will give us ~5-6 HP when mated to the aftermarket B-Pipe. Now imagine if you just mate the Y-Pipe to the stock B-Pipe. You will most likely get less than 5-6 HP.

 

I love my Ultimate Racing Y pipe - zero fitment issues (took about 20 minutes),and a very straight through design with minimal bends, dual 2.5 inch stainless pipes with dual flex sections, merging together at a 3 inch flange.

 

I am sorry i know this forum is about the prices of Y-pipes, but I am intrested in something proformance wise I have Injen Intake. I am planning on getting exaust when i can figure out which type i want, and I have thought about getting a Y-pipe. The problem is iam not to sure about it what do they do proformance wise, and would i be able to get one and use it with my stock exaust? I am guessing that wont work?? Sorry iam an amature.

 

Gsedan35

Question -- just to clarify...the JIC Y-pipe and Nismo exhaust fit perfectly 80mm? I have a NISMO exhaust coming from Japan (G35 version not the Z33 w/extension) and thinking of not using the NISMO Y-pipe that comes w/it. Thoughts?

Thanks

 

basically replaces your stock unit with one that is decatted (the biggest restriction), and the aftermarket ones are larger diameter, to better mate with an aftermarket cat back

 

Adam, dont you think the JIC has a better "flow" design than that of the Ultimate Racing Y-pipe? And considering that I have the UR cats would it be a better idea to run the same Y-pipe? Also why are they SO expensive????

 

I don't think they are expensive considering its a custom made piece, not a made in Taiwan piece. In fact, the Y pipes are all right around the same price regardless of brand

I cannot fathom how anyone can tell which flows better by looking at them........the only way to tell is to put them on a flow bench and do the tests, and I think they would all come out quite similar. Then of couse you get into the issue of all the various types of cat backs out there. I do not think its a case of best or worst, just different

 

I agree, you guys are trying to analize these like you are designing a wing for supersonic airplane, just pic the best value and looks like it flows better than stock and go with it anything has to be better than stock. But also get an exhaust system as well or a mid pipe to take advantage of the y-pipe.

 

The Nismo piece your getting is very good. I'll argue that the Jic item is still better (not the only one that will say that). You could alway's sell the unused Nismo Y-pipe in the market place and buy the Jic Y-pipe. But, your the only one that can decide if it's worth doing, afterall, your already spending a tidy sum.

 

It doesn't take much to look at the oem system, and realize where the problems are. If you’re not willing to find out what makes a good system good, you’re doomed to settle for the whim of the unscrupulous salesman whose only moral code is the best can only be what's sitting in his warehouse.

 

the problem with the OEM system is obvious - it has a cat.

Remove that, which is undoubtedly the single biggest restriction, and you get gains. From there, a particular design might be better suited to one person's setup vs another (headers vs no headers, cams vs no cams, one cat back vs another, but those differences are miniscule in comparison IMHO.

I don't think its a matter of buying what the salesman is offering - we offer most of the popular Y pipes out there, so we have no real axe to grind one way or another - its just a case where I don't think, for most people's setups or intended setups, that one is better than another, just different. I have my own reasons as I why I recommend one vs another, and it honestly comes down to the manufacturer.

Adam

 

ANyone ever combined a Y-Pipe with a Flowmaster 80?