C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

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Old Aug 31, 2009 | 12:40 PM
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I am getting an exhaust built but dont want it to loud all the time. Its all stock from header to cat and then an aftermarket Y with a crossover and 2 ebay mufflers.

I was thinking of going longtubes (Exotic) to 2.5 true duals with an X and two bullet cats to mufflers.

Would 2 cutouts before the X and cats net any gains? I want a really restrictive muffler to get noise down. Maybe a pair of resonator cones in each.

Is there room to put cutouts? Pics if you have them
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Old Aug 31, 2009 | 03:01 PM
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The only place I could find to put them was after the rear axle, right behind the mufflers. I have headers, no cats, X pipe, cutouts, mufflers. It works well, and the cutouts are easy access. No pics, but it's pretty easy to understand if you look under the car.
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Old Aug 31, 2009 | 03:04 PM
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I've seen cut outs before the mufflers

picture the pipes from the resonators going straight.

EDIT
this one has extensions

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Old Aug 31, 2009 | 03:32 PM
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Pretty sanitary for cutouts... (I've seen worse...a LOT worse!)
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Old Aug 31, 2009 | 09:45 PM
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Hmmm so no way to do it right off the headers?

that pic looks pretty good but I wont be using extensions most likely
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Old Sep 1, 2009 | 10:00 AM
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There are all types of Cut-outs. You want the pricey ones that can be controlled from inside the cabin. You don't want to have to crawl under there every time you would like to utilize them...

And if you have a 'real' Muffler shop do the work, you can place the cut out where ever you wish it to be. (space being your limiter)

Last edited by jhammons01; Sep 1, 2009 at 10:02 AM.
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Old Sep 1, 2009 | 12:18 PM
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Maybe look into DMH cutouts! They are designed to weld in on the side of the pipe.

They are great for those "hard to reach" area's.

I hope that helps!

-Adam

Corvettes of Dallas
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Old Sep 1, 2009 | 06:54 PM
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I was looking at DMH.
I will be getting an entire exhaust system fabbed up with my Longtubes so putting them in is no problem.

I was just trying to see if anyone had them right off the headers before or in the trans tunnel

electric is a given
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Old Sep 1, 2009 | 08:21 PM
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Originally Posted by 383tpimachine
I was just trying to see if anyone had them right off the headers before or in the trans tunnel
I'm trying to do that at present but the only way I see them fitting is to point down and then you have ground clearance problems
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Old Sep 1, 2009 | 09:30 PM
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thats what i was afraid of
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Old Sep 1, 2009 | 11:06 PM
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Here's the other cutouts
Keep in mind your going to throw you tune off, or tune it for open, then drive around with it slightly off.

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Old Sep 1, 2009 | 11:19 PM
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thats great. might just go with that setup and no cats at all
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Old Sep 21, 2009 | 02:36 AM
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I have seen one C4 with cutouts attached to mufflers. The setup looked clean, but when you have cutouts closed, those exhaust gases were coming out only from the outer tips. The car uses these mufflers http://www.holley.com/data/types/pic...%20graphic.jpg

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Old Sep 21, 2009 | 08:21 AM
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Originally Posted by BrianCunningham
Here's the other cutouts
Keep in mind your going to throw you tune off, or tune it for open, then drive around with it slightly off.

I have something very similar to this setup. I custom made my own 3" dual system with Long tubes and high flow cats up front, then the pipes go straight out the back with a 3 bolt flange like pictured, then the muffler pipes are welded to the straight pipe. I welded the bolts to the 3 bolt flange that way all I have to do when Im at the track is kneel down and undo 6 bolts. It takes less than a minute and its loud.
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