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Are two cut-outs overkill?????

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Old Apr 10, 2006 | 05:38 PM
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Default Are two cut-outs overkill?????

I'm getting a new exhaust built.

3" pipes off each collector, than into two 3" cut-outs, than into a Flowmaster merge (3" INLETS, single 4" OUTLET), than back to my MagnaFlow.

Or should I just have one 4" cut-out after the Flowmaster merge?

Thanks.


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Old Apr 10, 2006 | 05:42 PM
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Go for it.... ...2 are coooooooool....2 is better than 1 ... just get ready for noise...friend has a 67 chevelle 396 with dual c/outs...the ground shakes..literally.
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Old Apr 10, 2006 | 05:46 PM
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how far back are you going to run the dual 3 " cutouts behind your collectors ?o2s don't last long with open exhaust close to them.the single 4 " should be far enough away for them to last longer if you plan to leave it open much.make are you getting the chassis mount ta with the driveshaft loop ?if so make sure your y will not intefere.
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Old Apr 10, 2006 | 05:46 PM
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Originally Posted by NHRAMAN
Go for it.... ...2 are coooooooool....2 is better than 1 ... just get ready for noise...friend has a 67 chevelle 396 with dual c/outs...the ground shakes..literally.
Is it ok to have the cut-outs inbetween the o2 sensors though? Just thought of this.
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Old Apr 10, 2006 | 05:51 PM
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his has no O2 or cats of course...what u mean between them..you aren't gonna run cats and will have O2 sims right.?? slowtrap is right,put them downstream of the other O2's at least 8-10 inches.
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Old Apr 10, 2006 | 05:58 PM
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I will have no cats. I was thinking of putting them right after the collectors. I don't have o2 sims, should I get them?

What is the difference in power gains from dual cut-outs or just one 4" cut-out after the merge? Might just be easier to do a single.

Also, I'll only have these open when I run someone, I'll never just drive around with them open.


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Old Apr 10, 2006 | 06:55 PM
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The heat from having them so close to the collectors will also reduce the cutouts life.
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Old Apr 10, 2006 | 07:07 PM
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I have (2) e-cutouts located behind the cats (welded into y-pipe)

....and (2) sound badazz compared to a single IMO
Attached Thumbnails Are two cut-outs overkill?????-ls1pic.jpg  
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Old Apr 10, 2006 | 07:12 PM
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Originally Posted by Firehawk526
I have (2) e-cutouts located behind the cats (welded into y-pipe)

....and (2) sound badazz compared to a single IMO
Are they two QTP 3"
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Old Apr 10, 2006 | 07:15 PM
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NO....mine are DMH's which have slightly bulkier motor housings. SOB's are heavy, and in hindsight, should have elected to go w/QTP's.

Don't get me wrong, I love the DMH's but for tight clearance issues, I would have been better off w/QTP's

http://www.dmhperformance.com/ecutoutiframe.htm
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Old Apr 10, 2006 | 07:44 PM
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Originally Posted by Firehawk526
NO....mine are DMH's which have slightly bulkier motor housings. SOB's are heavy, and in hindsight, should have elected to go w/QTP's.

Don't get me wrong, I love the DMH's but for tight clearance issues, I would have been better off w/QTP's

http://www.dmhperformance.com/ecutoutiframe.htm
I guess I'll go with QTP's than.
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