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Best Flowing Y-Pipe

This is a discussion on Best Flowing Y-Pipe within the External Engine forums, part of the LSx Technical Help Section category; I remember reading somewhere that the Flowmaster was the best flowing one out there, but like I said, I don't ...

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    Best Flowing Y-Pipe

    I remember reading somewhere that the Flowmaster was the best flowing one out there, but like I said, I don't remember. Anyone?

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    The Flowmaster MERGE is really nice but to my knowledge they do not make a Y. You can buy a FM merge from Summit, Jeg's etc... and then have a shop make you a Y.

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    NY Representative basballny2's Avatar
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    from what ive heard kooks or ARH

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    Quote Originally Posted by basballny2 View Post
    from what ive heard kooks or ARH

    Yea My ARH is the bomb but they are made to fit their headers unless fabbing is done. And trust me they are not cheap either......

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    Quote Originally Posted by SOMbitch View Post
    The Flowmaster MERGE is really nice but to my knowledge they do not make a Y. You can buy a FM merge from Summit, Jeg's etc... and then have a shop make you a Y.
    right now ive got a hooker Y, to mate up to my hooker headers. eventually (after HCI) im going to re-do my exhaust with a custom Y fabbed from a FM merge.

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    Senior Member JoshuaGrooms83's Avatar
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    Has anyone tryed the edelbrock y pipe. does it fit on anything else other then edelbrock headers?

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    Quote Originally Posted by SOMbitch View Post
    Yea My ARH is the bomb but they are made to fit their headers unless fabbing is done. And trust me they are not cheap either......
    Yep, afaik the Flowmaster is one of the best "universal" merges. Supposed to cut way down on rasp compared to crappy y's like a Pacesetter. My dad's car was pretty raspy before the spun cats and it has a Flow merge. Might have something to do with the smaller 80 series muffler... Yeah, that shit's going to be gone for ARH lt's and catted y +Magnaflow

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    NY Representative basballny2's Avatar
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    i could be wrong but i dont think the y-pipe has alot to do with the rasp.....thats more the exhaust system you choose......

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    Join the PHK @ thephk.org Sommer86@6LE's Avatar
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    The y has tons to do with the rasp. The flowmaster merge cuts down on rasp because the 2 pipes entering the collector are parallel. The air flows evenly into the I pipe and out to the exhaust. On other non custom y pipes like hookers or pacesetters, one pipe is welded midway INTO another pipe. The gases collide where the pipes meet instead of flowing evenly. That meeting of gases is how rasp is produced.

    PS: I love my Flowmaster merge.

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    Are these the FM Merges you guys are talking about?


    http://www.summitracing.com/search/B...ord=flowmaster

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    Quote Originally Posted by Dabom75 View Post
    Are these the FM Merges you guys are talking about?

    http://www.summitracing.com/search/B...ord=flowmaster
    This is the universal one I found:

    http://www.jegs.com/p/Flowmaster/Flo...44773/10002/-1

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    Join the PHK @ thephk.org Sommer86@6LE's Avatar
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    Quote Originally Posted by Dabom75 View Post
    Are these the FM Merges you guys are talking about?


    http://www.summitracing.com/search/B...ord=flowmaster

    Here's what I have:
    http://www.summitracing.com/parts/FLO-Y300350/

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    Quote Originally Posted by Sommer86@6LE View Post
    The y has tons to do with the rasp. The flowmaster merge cuts down on rasp because the 2 pipes entering the collector are parallel. The air flows evenly into the I pipe and out to the exhaust. On other non custom y pipes like hookers or pacesetters, one pipe is welded midway INTO another pipe. The gases collide where the pipes meet instead of flowing evenly. That meeting of gases is how rasp is produced.

    PS: I love my Flowmaster merge.
    i understand what ur saying but isnt more rasp created by the exhaust type over the y-pipe type?

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    Quote Originally Posted by basballny2 View Post
    i understand what ur saying but isnt more rasp created by the exhaust type over the y-pipe type?
    No. The muffler can't create rasp, just tone it down or not. Everything pre I-pipe is what determines rasp

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    NY Representative basballny2's Avatar
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    then why do people say SLP exhaust is more raspy than other exhausts......becausse other exhausts quiet the rasp down better?

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    Join the PHK @ thephk.org Sommer86@6LE's Avatar
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    I have an SLP exhaust (LM1). It wasn't raspy until i did my headers and custom Y. The only rasp I have is when the exhaust pulses through the headers and resonate in the Y at 2k. With Cats or a tune, it would all go away. above 2k and below 2k NO RASP whatsoever!...Just sex to the ears.

    On a side not, my buddy with a Hooker headered & y-piped, Corsa exhausted T/A had some of the worst rasp i've ever heard...his Hooker Y broke last week and he got the FM Y-merge and he says the rasp is 99% gone and it's WAY quieter in the cabin.

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    Join the PHK @ thephk.org Sommer86@6LE's Avatar
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    Quote Originally Posted by basballny2 View Post
    then why do people say SLP exhaust is more raspy than other exhausts......becausse other exhausts quiet the rasp down better?
    Read below...or above, lol

    Quote Originally Posted by wheeliE-maxx View Post
    No. The muffler can't create rasp, just tone it down or not. Everything pre I-pipe is what determines rasp

    This quote answered your question. Some catbacks are just quieter than others. For example, the LM1 is a resonator, not a muffler. The hooker aerochamber is a muffler (it muffles sound). Go to ls1sounds.com and listen to some different set-ups.

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    ARH headers/catted Y and Hooker Aerochamber here and NO rasp at all. A fabbed Y with cats and a FM merge would be just as good if done well....

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    NY Representative basballny2's Avatar
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    i have kooks headers with kooks ORY with SLP exhaust but have a magnaflow bullet muffler in the place of the resonator and have no rasp either and havent got the car tuned yet......hmm

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    Join the PHK @ thephk.org Sommer86@6LE's Avatar
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    Technically, I'm kooks 1 3/4" to an uncatted custom ORY w/FM merge, with a dynomouth and 2 1/2" CME tips.

    I can't wait to get my cats on next week.

    See ya later, rasp!!
    Last edited by Sommer86@6LE; 12-09-2009 at 03:14 PM.

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