purez33

Haha is it working??

purez33

I lied, it's a flowmaster y pipe.

http://m.ebay.com/itm/390754803451?nav=SEARCH
I wish they just cut it to make it even and have two identical pipes connecting it to the rest of the exhaust but still way better than my 3" y pipe connecting to the 2.5" Topspeed inlet. The flowmaster is a much smoother/freer flowing section than what Topspeed made.

blnewt

iTrader: (13)

Yep, pics are working, interesting build. Any pics of the tips?
Thanks for posting!

purez33

Nah but they're the standard rolled tips that come on the Topspeed exhaust.

Finzel

Here is an interesting tidbit I found regarding test pipe's

Catalytic Converter Removal - Beat the Law - Import Tuner Magazine

cmackin

Anyone have more experience in winter climates? I am reconsidering getting this exhaust if it is going to rust.

conquistador

I wish I would have found your posts earlier. I searched for hours online and on this forum... What effect would a 3" collector y pipe feeding into a 2.5" inlet midpipe have on the sound or performance?



So just to confirm the circled piece below is 2.5"




and Topspeed's y-pipe is 3" where it feeds into the midpipe

blnewt

iTrader: (13)

Here's a thread w/ a couple guys that have added the 3" collector Ys to their TopSpeeds
https://www.myg37.com/forums/g37-sed...39-y-pipe.html
FWIW the TopSpeed Y should be the same as the Y from Megan Racing.
You might want to PM those guys that have done this for more info.
Brad

conquistador

What I don't get is how Topspeed would build parts for the same car that don't match up (3" outlet from their y-pipe to 2.5" at their midpipe).

blnewt

iTrader: (13)

It is strange, but for whatever reason that's all that's available now that Exhaust Depot no longer exists. I'm as mystified as you

blueis300

iTrader: (1)

When I asked Topspeed last month they said it matched. Hmm

ShockinG37

iTrader: (1)

Anyone confirmed if the topspeed Y-pipe bolts up directly to the topspeed Midpipe?
"Rob145" looks like he did a manzo Y-pipe to the topspeed mid, I imagine they have the same diameters?

lobuzz311

iTrader: (6)

Was there any final consensus whether the Top Speed Y-pipe actually matches up to the midpipe, or is it a 3.0-2.5 reduction at that connection?

NeoNz

iTrader: (1)

Great thread guys, and thanks for posting the pic of the 3" -->2.5" collector!! huge help and huge win to eliminate drone!

blnewt

iTrader: (13)

Just added the 3" Y to my topspeed, (I also have resonated test pipes) and drone didn't increase, just a small rpm window of rasp from 2800 to 3000 rpm, and it's just a slight hiss in the cabin. If it gets worse over time I think I would take the Topspeed mid pipe to a shop and have them put a 3" flange and a 3" pipe tapered down to 2.5" to smooth the transition.
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