I've done many searches and have found almost no threads on just this part of the piping. Anybody have any reccomendations for Y-pipes?

I will be combining a Y-Pipe with a high flow cat set-up (Kinetix) and am looking for a Y-Pipe that is descent quality without a huge price tag.

Anybody with any experience on Y-pipes please post your comments.

 

If your keeping the rest of the system oem down stream, I would go with the Tanabe Y-pipe. It has 60mm imput diamter and a 70mm output diameter. All other Y-pipes use larger imput and output diameters, usually 65mm and 80mm. Your oem mid pipe has a 65mm diameter.

http://www.tanabe-usa.com/exhausts/files/158_img1.jpg

 

Just ordered Tanabe y-pipe and made measurement of my midpipe.It's about 61/62 mm outside diameter. Not sure, it's necessary, to order cone reducer (from 70mm to 62mm) to help the flow better from y-pipe to midpipe. I know it's more problematic for other y-pipes with 3inch(80mm) output diameter (if you still want to keep stock midpipe)
Mike

 

where did you order it from and for how much? thanks.

 

i bought it from intensepower.com. If you search on google, you will see other places sale cheaper but plus shipping is as much as from intensepower.com with free shipping
hope it helps,
Mike

 

IMO getting a larger aftermarket y-pipe and keeping the stock exhaust is a mistake. Without a reducer, it will create an orifice-type restriction and create backpressure.

Even with a cone reducer it will create a venturi-type restriction (not as bad backpressure) but it seems doubtful that there could be a performance benefit from this, so there is practically no point in wasting your money.

If anyone has dyno evidence to prove me wrong, I'll gladly take back what I said.

 

Well, I wanted to get a Y-Pipe because I am getting high flow cats at the same time. I didn't want to get higher flow from the cats just for them to open into the restrictive Y-pipe.

Do you think I should just get the cats or will the Y-Pipe be effective in my case because I'm combining it with HFC's?

 

I don't understand how you can greatly benefit from

2.25" outlet HFC to two y-pipe inlets of 2.5" and then go from a 3" outlet down to a 2.5" midpipe (if you retain stock exhaust)...

seems like you would need 3" back from the y-pipe to make significant benefit, keep the flow smooth and eliminate the restriction.

 

don't aste your time w/ a y unless you're doing a complete catback - changing it out stock will do nothing but loose down-low power with minimal gains uptop

plus I'm convinced that cracking cats are caused from aftermarket y's - not proper flex stress points so they cause the cats to crack.

no reason at all in my books to change it out.

 

I had a Fuji Y pipe with my stock exhaust and def. thought it was worth it. I still have it sitting around and will sell it cheap if you want. Fuji quality is unbeatable.

 

"Quality" does not address the issue that I brought up. Do you have a logical answer?

 

So would it be ok (structurally) to go with only High flow cats on a stock exhaust system?

Will I still experience the horsepower gains that is supposed to come from high flow cats if thats the only modification I do to the stock exhaust system?

 

Before anyone answers that I should also mention that I currently have a JWT Pop charger and an AAM plenum spacer.

So I'm allowing more air into the car...now won't the high flow cats help that exhaust exit the car...resulting in more power?

 

That's what I'm doing (for now) ... catback exhausts are very expensive, $/hp-wise for N/A applications

keep in mind the stock ECU sucks (does not come close to optimizing air/fuel and timing for power) so I'm going for a tune as well with the greddy Emanage ultimate.

If you have JWT popcharger, plenum, and high flow cats, you can probably benefit quite well from a technosquare reflash.

Don't forget to at least get a dyno pull after you get your mods on, so you can check your air/fuel ratio. Unless you're very lucky, it won't be perfect which means you can gain power from tuning.

 

It's All Greek To Me... Wish I Knew What The Heck You Guys Were Talking About.. Signed - The Newbie :-)

 

Wired- I was actually planning on doing the reflash right after the exhaust modifications. Well, I guess thats what I'll stick to then: high flow cats and a reflash.

What do you think my power should be at (roughly) on a 06' with the high flow cats, intake, plenum spacer and reflash?

Oh and I'll make sure to do the dyno runs!


The claw- just surf the forums...I learned a lot real quick that way!

 

No clue, especially since every dyno is different...

 

255 ish

 

About 255!?!

Isn't that low?

Assuming a 17% drivetrain loss that means that I'm at about 305 flywheel horsepower.

So with intake, plenum spacer, high flow cats and a ECU reflash I've gained only 5hp over the stock set-up?

Is my math wrong?

If I'm going to gain a total of 5hp from $1,400 in total modifications then should I think twice before getting the HFC's and reflash?

I was hoping with all of these modifications to be at, at least 365 RWHP...was that wishful thinking?