Cut outs
Melting Slicks
Joined: Feb 2006
Posts: 3,191
Likes: 43
From: Scottsdale Az
I ran cutouts back in the F-body days and it was pretty neat the first week, but after a while they got annoying. I thought I would open them up and shut them based on where I was going, not for long. Crawling under the car every week was a pain to say the least. It also would drone in the cabin because it was un-muffled.
Then I went out and got electric ones on a Lightning I had. After maybe 4k miles the motors went out and only one butterfly worked. The truck still droned when they were open but because I could close them with a switch that wasn't as bad, until one got stuck open. Closing the other one was just weird sounding and I ended up taking them off and putting on a Magnaflo.
Now with the vette I said forget it. Got me some Borlas and I love them. Loud as all hell when I whack it and no drone when cruising. My .02 is to get a decent set of mufflers and call it a day.
Then I went out and got electric ones on a Lightning I had. After maybe 4k miles the motors went out and only one butterfly worked. The truck still droned when they were open but because I could close them with a switch that wasn't as bad, until one got stuck open. Closing the other one was just weird sounding and I ended up taking them off and putting on a Magnaflo.
Now with the vette I said forget it. Got me some Borlas and I love them. Loud as all hell when I whack it and no drone when cruising. My .02 is to get a decent set of mufflers and call it a day.
Race Director
Joined: Jan 2006
Posts: 10,554
Likes: 33
From: Not on either liberal coast.
If you search this forum (in the red banner), use keywords "cut outs" or "QTP" or similar for past discussions. It gets asked/answered a lot.
Most of the complaints of past were about the valves eventually not functioning as well as when new.
Most of the complaints of past were about the valves eventually not functioning as well as when new.
Melting Slicks
Joined: Jun 2001
Posts: 2,400
Likes: 1
From: Woodbridge Va
Here is a simple picture of my setup. 2.5 inch QTP with downpipes
Some people have had issues with the flaps leaking or not closing all the way. The only issue I have is one closes slower than the other (which is not a big deal because they stay open as much as possible).
If you do decide to get a set, I would go with the standard 'flip switch' control and not the electronic push button setup.
The electronic push button control will close your cutouts when you turn the key on, so you have to open them back (should you want them open when you turn your car on).You can PM Patches, he was a great help with my install along with a couple other guys on here. Patches has the cleanest undercarriage that i've seen in pictures and his cutout install looks awesome. I'm sure he will chime in and answer any questions that me or some of the other guys cannot.
Last edited by Lowcash; Feb 12, 2008 at 01:24 PM.
Drifting
Joined: Apr 2003
Posts: 1,387
Likes: 10
From: Jacksonville FL
I have DMH cutouts on my car and love them. With the stock cat back my car is pretty quiet, but sounds like a race car when I want it to. I love the sound of a big V8 and get a lot of compliments when it's open, but don't need that much attention or noise all the time. There's a single button on my console that dosen't detract from the interior at all.
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Melting Slicks
Joined: Jun 2001
Posts: 2,400
Likes: 1
From: Woodbridge Va
Melting Slicks
Joined: Jun 2001
Posts: 2,400
Likes: 1
From: Woodbridge Va
btw: I sealed the inside of the hole with dynomat and have no exhaust fumes in the cabin.
Last edited by Lowcash; Feb 16, 2008 at 11:44 PM.
Race Director
Joined: Jan 2007
Posts: 18,643
Likes: 14
From: Norman Oklahoma - The Only State in the Union with no Blue Counties!
Do a search on the Events & Regional Forum for a member called sixsixvette! He just had some custom cutouts done in Norman, Oklahoma.
Le Mans Master
Joined: Nov 2006
Posts: 7,021
Likes: 46
From: enterprise al
St. Jude Donor '08
i have a single cutuout on my 94 z28 and i love it! yes i am young and i love loud exhaust... i come from a musically inclined family and i, myself, inhereted quite a bit of it myself, so i dont wanna hear sh*t about loud exhaust being for young folk... i've heard many vettes with corsa and other systems that just plain sound like sh*t but i'm not the a$$hole who constantly brings it up.. all i'm sayin is dont listen to somebody just because they have sand in their vajayjay and say something is too loud..
Racer
Joined: May 2003
Posts: 478
Likes: 1
From: Newark de
I just posted another thread about this. I elected to not go the electric route and went with these. I made them myself. Takes seconds to remove and install.
http://forums.corvetteforum.com/show....php?t=1943375
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http://forums.corvetteforum.com/show....php?t=1943375
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Administrator
Joined: Mar 2001
Posts: 367,716
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From: In a parallel universe. Currently own 2014 Stingray Coupe.
C7 of the Year - Modified Finalist 2021
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Contact forum member Patches - he posted some good write-ups in the past on cutouts he installed on his car.
Le Mans Master
Joined: Sep 2007
Posts: 7,604
Likes: 8
From: Belleville Il
i have a single cutuout on my 94 z28 and i love it! yes i am young and i love loud exhaust... i come from a musically inclined family and i, myself, inhereted quite a bit of it myself, so i dont wanna hear sh*t about loud exhaust being for young folk... i've heard many vettes with corsa and other systems that just plain sound like sh*t but i'm not the a$$hole who constantly brings it up.. all i'm sayin is dont listen to somebody just because they have sand in their vajayjay and say something is too loud..
Dunno, maybe I just refuse to grow up!!! 
Racer
Joined: Feb 2006
Posts: 409
Likes: 0
From: Albany NY
I had a set of QTPs but never installed them. Sold them to a forum member because I was too lazy to weld the pipes. If I could do it again I would have spent the money and had someone do the work for me. Now I am stuck with the task of manually switching my exhaust when I get sick of the drone. 
Oh yeah, be careful not to push the hanger bolts into the frame or you might have to remove part or all of the rear fascia.
Oh yeah, be careful not to push the hanger bolts into the frame or you might have to remove part or all of the rear fascia.