Exhaust cutouts

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Tjhduster

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Hi guys, I have a 72 duster 340 and would like to know for those that have cut outs what is a great company and relatively easy to install?
 
I've tried several of the brands available on the Summit website. None of them sealed completely, or lasted. After a while, they would drift open slightly and sound like an exhaust leak or stop working all together. Pipes brand were the worst. My buddy, who got me hooked on them, had a set of QTP's on his B-Body for almost 10 years. they always sealed and never caused a problem. One of his got crushed, and we replaced them with another set of QTP's. They are still working great.

I finally bought myself a set of QTP's and they are working great. They seal up better than any of the previous versions I've tried. I don't have room for the large Doug's style cutouts, and have read that they have been redesigned and are not as good as they once were.

I buy 2 sets of foot long header collector attaching pipes that are the same diameter as my exhaust and cut and weld them into my exhaust about a foot behind the collector, but in front of the cross-over tube. I also always use a one-foot-long, cone-shaped, stainless-steel megaphone tip and weld it to the second set of collector pipes. I find it easier to use the type with the non-fixed flanges, so I can rotate the cutout into position easier before I tack them top hold that position once installed. Also, I use that heat protection sleeve for the wire loom under the car, and run them up through my shifter boot. I also always upgrade the control switch to a heavier duty Marine Grade switch. If you don't have your own welder, mock everything up, and take it to a muffler shop to have it welded into place.

Don't forget that one of the most important finishing touches to adding cutouts, and one thing that most people overlook is to add a oval-shaped, megaphone-style tip to each cutout. It sweetens the sound of your open exhaust much like the flared end of a horned instrument. It makes a dramatic improvement in the sound and helps direct the blast away from the ground, so you wont blow dust all over your car.
 
Had QTP s on my car for five years now
Never had any problems with them
Car don't go out in the wet which probably helps
 
I have the pypes cut outs and they did exactly as jbc mentioned. I called pypes, and they were not helpful. I would a try an alternate brand. Andrew
 
I wanted to put those on my car once, until I learned how painfully slow they are to open/close. So I put dual 3 inch mandrel-bent pipes behind my 360.
I wanted something that would automatically snap open when I floored it, and snap shut when I lifted. Then I could run about a 100 pounds less exhaust. I woulda run about a 1.75 single exhaust with a cherry bomb.My TTI duals with Dynomaxers are over 140 pounds from the collectors to the turndowns.
Imagine me pulling up next to you at the light, all quiet and grampa-ish. I gently blip the throttle next to you, and you think "whaaat?" But you respond with a menacing snarl. Then when it's go-time, I explode next to you.heehee. Grampa my a$$.
There was a fellow in Australia who was trying to bring a vacuum system to market. It was fast. But he went away. I didn't put my order in fast enough.I always dreamed of building my own, but the dual 3s are as good as not there behind my little 360.
 
RaceReady. Guaranteed for life. Pricey but they work. Well, I mean they function properly.
 
Ironmike said:
RaceReady. Guaranteed for life. Pricey but they work. Well, I mean they function properly.
Click to expand...

The ones I tried from this place would drift open and leak enough to hear an exhaust leak. About 5 years ago, the tech guy said it was a known issue that they couldn't resolve. They did quickly refund my $. I wonder if they finally figured it out, Ironmike? How long ago did you get yours?
 
Got mine 2010. No probs yet. I mean let's face it. Ya won't run quicker.....and they don't sound REALLY good like open headers, but most people seem to get a kick out of them.
 
The final sound depends a lot upon the install, and whether or not they have a tip on the end. One of my buddies had a shop install a set on his Hemi Road runner. The shop installed them facing backwards. it sounded very odd. He was pretty disappointed in the outcome after hearing how my '70 E-Body's open cutouts sound. Placement within a few feet of the collector and before any crossover is critical. I've had excellent results using an ovalized, cone-shapped megaphone tip on the end of the cutout. It significantly sweetens the sound of them, much like the flare on the end of musical wind instruments does. The size of the cutouts and exhaust pipes that feed and exhaust them play a roll too.
 
Quick Time Performance makes the best kit and don't overcharge !
I have 2.5" QTP on my Dart, 3 years and no issue.
Hold the switch for 8sec to open, 8sec to close.
Always seals tight and sounds great opened, gets a lot of attention when pulling into a show with'em opened up ;)


Check out my FB group for 1967-76 Dart Swinger Scamp Valiant
https://www.facebook.com/groups/411808649017795/
 
Warlock mufflers have them on them - not automatic though - manual.. you know, climb under the car, twist off the wing nuts - at least they are mostly fool proof.. I am however contemplating retro fitting a set of electric ones to them eventually - hoping it'll be an easy bolt on process
 
ScampMike said:
Warlock mufflers have them on them - not automatic though - manual.. you know, climb under the car, twist off the wing nuts - at least they are mostly fool proof.. I am however contemplating retro fitting a set of electric ones to them eventually - hoping it'll be an easy bolt on process
Click to expand...

When you buy a QTF set they also give you caps so if you have to take the electric flaps off you just put the caps on. If someone already has the Y pipe with caps, you can also buy just the electic flaps that bolt right on in place of the caps.
I'll dig up a pic of mine and post it
 
QTP 2.5" kit installed on my Dart

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Kirk Racing makes No-weeds knock offs that are almost identical but only have one butterfly vs. two on the no weeds brand. They are about half of what no-weeds cost.

They seal really well, and they can be opened any amount from a small crack to wide open.

Tune-able exhaust. :cheers:
 

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The thing about those is if they fk up on you, there's nothing you can do short of cutting them out. With the QTP kit they are bolted on. If they break you can take them off and put the caps on.
 
The only way the butterfly would f:violent1:k up is if I flattened the exhaust on a big ole Duke's O Hazard style jump. One would assume the entire car would be scrap by doing so.....:D

The linear actuator, which is the only wearing part, slides over a post on each end and is secured via cotter pins. Simple to change in and out if necessary. In an emergency, like failure of the actuator, you can manually open or shut them

I've been running them for 7 years without an issue and my buddy has been running them on his Super Bee for 10 years.

Happily there are still things being built that are meant to last. :cheers:
 
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