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Old May 2, 2011 | 11:15 AM
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3.5 qtp e cutout should I get it? The ones who have them do u like them better than other exhaust setups u have had?
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Old May 2, 2011 | 12:10 PM
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I have no idea what exhaust you have, but chances are the 3.5" is too big. My cars got a 3" DMH cutout, and though I am not sure if it adds or robs HP, it sure gets louder with it open!
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Old May 2, 2011 | 01:13 PM
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I've heard QTP makes great cutouts. But as stated above, make sure you invest in one that fits your exhaust!!
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Old May 2, 2011 | 01:15 PM
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Originally Posted by udienow
I have no idea what exhaust you have, but chances are the 3.5" is too big. My cars got a 3" DMH cutout, and though I am not sure if it adds or robs HP, it sure gets louder with it open!
N/A vehicles need the back pressure, so it will hurt the cars performance if the exhaust is too big. However, too much back pressure will kill a FI vehicle.
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Old May 2, 2011 | 01:31 PM
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a cutout will definetely add some power. its been proven time and again on here. i agree though, chances are you need a 3" cutout.
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Old May 2, 2011 | 02:04 PM
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Ya that's what I was thinking too to get a 3" cutout, but I didn't know what a 3.5 would do. Thanks for the input. Also what brand do u all like runnin? What brands to stay away from?
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Old May 2, 2011 | 03:31 PM
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I read a lot of good things about DMH... plus they have a 4 year warranty.
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Old May 2, 2011 | 04:13 PM
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QTP 3'' on mine. Just remember that you need to close them with the switch on startup as sometimes they are open a bit.
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Old May 2, 2011 | 04:44 PM
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alright ill keep that in mind. thanks
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Old May 3, 2011 | 09:50 AM
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Def. Get dmh.. I ordered mine directly from them well thought I did ... I never got it nor was I charged for it... Even tho he did give me a transaction # at the time I placed the order... Go figure
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Old May 3, 2011 | 10:01 AM
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DMH ! Great MOD!
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Old May 3, 2011 | 10:05 AM
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need more info on what you have already done to your car or plan to do...that would help...and N/A ls1's do not "need" back pressure, these things are not hondas.
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Old May 3, 2011 | 02:12 PM
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You will need a single 3" for a F Body. If you have any questions feel free to give us a call.
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Old May 3, 2011 | 02:31 PM
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Some cars need back pressure. But I have found from personal experience GM engines seem to do better with as little as possible.
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Old May 3, 2011 | 05:46 PM
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so would a 3 or 3.5 be better to get?
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Old May 3, 2011 | 05:58 PM
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Originally Posted by craig178
so would a 3 or 3.5 be better to get?
Depends on the size of your exhaust. Since it needs to be welded into your existing exhaust, going with a 3.5" if you have a 3" exhaust isn't going to work very well.

If you have the stock exhaust, IIRC it's a 3" that you'll need. That's what I obught, although I haven't gotten around to installing it yet (so hopefully it fits!)
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Old May 5, 2011 | 10:38 AM
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Originally Posted by silver2010
QTP 3'' on mine. Just remember that you need to close them with the switch on startup as sometimes they are open a bit.
Why does it have to be closed on startup? I just got my car about a month ago and it has an e cutout.
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Old May 5, 2011 | 05:58 PM
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i dont close mine on startup, hell thats the best part sometimes, scared the crap out of people in parking garages! car alarms go off, dog bark, cats claw, birds fly into windows, all that cool stuff! ha
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Old May 5, 2011 | 06:49 PM
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Originally Posted by Transam1
i dont close mine on startup, hell thats the best part sometimes, scared the crap out of people in parking garages! car alarms go off, dog bark, cats claw, birds fly into windows, all that cool stuff! ha
i got a 4'' cut out on my car and i love staring it up at meets when tons of people are standing around, they jump and really scare them lol
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