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Exhaust experts within, please!!

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Old Oct 8, 2002 | 07:39 AM
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Default Exhaust experts within, please!!

Is there no such thing as a Flowmaster 3" to 3.5" Y-collector? All I'm seeing are 2.5" to 3.5". What's the deal? My Y-pipe will be 3", not 2.5". What can I do?

Also, which merge collectors could I buy that would replace (and offer more performance than) the ones that come with the Hooker longtubes?

TIA.

<small>[ October 08, 2002, 07:43 AM: Message edited by: RAGEman ]</small>
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Old Oct 8, 2002 | 10:33 AM
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Default Re: Exhaust experts within, please!!

If its posiible it would be best to run 3"y to 4" and through a 4" mufflex cat back. You can use a reducer to get the y from 4" to 3.5".
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Old Oct 8, 2002 | 11:16 AM
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Default Re: Exhaust experts within, please!!

Well, I bought Hooker long-tubes and am planning on getting a custom Y-pipe done. What diamater is the header where it goes into the Y-pipe? I assumed it was 3". Was I mistaken?
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Old Oct 8, 2002 | 11:21 AM
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Default Re: Exhaust experts within, please!!

Someone else posted that there is little advantage to using merge collectors on a full exhaust. I would just leave the straight collectors.
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Old Oct 8, 2002 | 11:23 AM
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Default Re: Exhaust experts within, please!!

Mufflex makes a ypipe for the hooker longtubes that uses a flowmaster 2 3" in and 1 4" out y collector. Its like $280. It should work for any cat back as long as you get a reducer to decrease the size from 4" to 3".
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Old Oct 8, 2002 | 01:21 PM
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Default Re: Exhaust experts within, please!!

All right, guys, check it out. I plan on dumping the exhaust before the axles using one Dynomax bullet muffler. This is the setup I had before and it sounded loud, deep, and just overall had a great muscle car tone. And of course, you can't hardly beat that setup for power and weight savings.

Previous setup details:
</font>
  • <font size="2" face="Verdana, Helvetica, sans-serif">Grotyohann long-tubes</font></li>
  • <font size="2" face="Verdana, Helvetica, sans-serif">Grotyohann 3" off-road Y-pipe (yes, the crappy one)</font></li>
  • <font size="2" face="Verdana, Helvetica, sans-serif">Custom 3" I-pipe w/ one 12" long, 3"-in, 3"-out Dynomax bullet muffler turned down before axles</font></li>
<font size="2" face="Verdana, Helvetica, sans-serif">This setup rocked. I guess what I'd like to do is turn the 2 3" stems of the Y-pipe into 1 3.5" (or 4") stem, and then doing a 3.5" (or 4") I-pipe, etc. It's loud, but it sounds good, and it's gotta perform better than ANY catback.
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Old Oct 8, 2002 | 02:22 PM
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Default Re: Exhaust experts within, please!!

Should be a very efficient set for max hp. A couple of ways you can do this. Buy the ypipe from mufflex thats made for hooker long tubes or you can just by the flowmaster collector and have a custom y made.

The Mufflex y has 2 3" mandrel bent tubing into flowmaster y collector with a 4" out. You can run the Y into a 4" bullit with turn down. The 4" bullit is just as big externally as the 3.5" bullit so it should fit just as well.

If space is available you can run an ultraflo muffler which is quieter than the bullet along with being heavier.

When you put this monster exhaust together you got post a sound clip. Not just a clip with rev in neutral, a clip running a couple of gears up to the redline. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

<small>[ October 08, 2002, 02:58 PM: Message edited by: dug ]</small>
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Old Oct 8, 2002 | 05:57 PM
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Default Re: Exhaust experts within, please!!

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by dug:
<strong>When you put this monster exhaust together you got post a sound clip. Not just a clip with rev in neutral, a clip running a couple of gears up to the redline.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Sure thing, buddy. Seriously, what's the best way to record sound clips for use on the computer? And which forum should I post it in?
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Old Oct 8, 2002 | 06:35 PM
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Default Re: Exhaust experts within, please!!

RAGEman, my setup is similar to what you're building. Grotts with custom y-pipe....3 1/2 to 4" back. Flowmaster collector. Here's a couple of pics and an idle sound clip.

full exhaust

collector

idle sound
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Old Oct 8, 2002 | 07:24 PM
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Default Re: Exhaust experts within, please!!

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by RAGEman:
<strong>Is there no such thing as a Flowmaster 3" to 3.5" Y-collector?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Flowmaster partnumber Y300350
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Old Oct 8, 2002 | 07:27 PM
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Default Re: Exhaust experts within, please!!

Dave, thanks! Looks awesome!
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Old Oct 8, 2002 | 07:44 PM
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Default Re: Exhaust experts within, please!!

Great info, gentlemen. Now, I'm going to throw a huge wrench into things. I recently saw a post where an individual is making 3" X-junctions for our cars. I may purchase one of these and pay a trusted local exhaust shop to build 2 3" pipes to get the header collectors to the X-junction and then purchase 2 Dynomax bullets and do 2 turndowns before the axles. How about that? I realize that pretty much negates all that we just talked about, but I'd like some feedback on this. Thanks again, guys.
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Old Oct 8, 2002 | 07:48 PM
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Default Re: Exhaust experts within, please!!

Actually, the true dual with x-pipe is what I originally set out to do. But it couldn't be done with the Spohn torque arm brace that I have, so I went with a free flowing traditional y-pipe setup.
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Old Oct 8, 2002 | 08:01 PM
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Default Re: Exhaust experts within, please!!

Rageman

I sent you an email of an xpipe sound clip. I downloaded it from here. Cant remember who posted it.
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Old Oct 8, 2002 | 08:03 PM
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Default Re: Exhaust experts within, please!!

Oynxss

Do you have have any full throttle sound clips or videos?
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Old Oct 8, 2002 | 08:08 PM
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Default Re: Exhaust experts within, please!!

The only other one I have is of a few revs in the driveway. No WOT, unfortuneately.

revs
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Old Oct 8, 2002 | 08:30 PM
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Default Re: Exhaust experts within, please!!

Sounds nasty!!, I'm running Hooker longtubes to Mufflex ypipe to bullet muffler with turndown. The sound is unbelievable! <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
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Old Oct 9, 2002 | 01:31 AM
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Default Re: Exhaust experts within, please!!

If you don't mind loud, the custom pipe and the Dynomax racing muffler on my car produces the deepest sound I have heard on a 346.
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