Should i buy a butterfly valve for my exhaust? What it does is with the flip of a switch lets the exhaust out right after the header, but say you have to go through town, flip the switch back on and the exhaust comes out your tailpipe. Any Opinions?
Butterfly valve??
Drtbkercr5
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Should i buy a butterfly valve for my exhaust? What it does is with the flip of a switch lets the exhaust out right after the header, but say you have to go through town, flip the switch back on and the exhaust comes out your tailpipe. Any Opinions?
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yea, think those would sound good on a stock 97 gt?
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I'm getting some manual ones so I can be obnoxtious in my school parking lot. But I do agree wth derrel on this one
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yea, i just want them for the school parking lot 
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you cant do them on stock headers, you have to use longtubes basically
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No, they mount in to any exaust system. You can mount them anywhere you want in the tbe after the gatherer. The problem is that they bottom you out on everything. I used to have a set. I pulled them off and just got a full exaust, Your car will run like crap with them open and you will go through spark plugs if you have it open for more than a few hours at a time. Unless you are tuned for open tube, I wouldn't do it. Just get new exhaust with some straight through pipes. It will be louder than legal.
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but how do you put a cutout on a shorty? and not burn up your valves?
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They don't go on the headers, they go in the exhaust pipe. What do shorty headers and burned valves have to do with each other anyway?
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They are a left over from the 60s, cheesey as hell
1+ worthless!
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Your car will run like crap if you don't have a good tune for open headers. My friend has a butterfly valve on his z28 camaro...and it's awesome. He doesn't bottom out on anything. If you're going to do it, don't get the one with the electric switch to open and close...they go out all the time. Get the manual butterfly valve. Everyone's got their own opinion on this one, I'm not sure how butterfly valves sound on mustangs.
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A cutout might help if you have a turbocharged vehicle...Reducing back-pressure by opening up the exhaust before the converters and/or cat-back would definitely improve performance and spool-up...But on an N/a motor it wont do much but make the car louder.
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Im under the impression that if you run a open shortie header, it will burn a valve likity split.
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Some e cut outs are better then others my friend has on on his subaru wrx and it is the ****. he has it tuned for it open and when you floor it and then open it you fell it pull you in the set even harder. It is also cool when you go up to a honda and your like it is stock lets race and then when you open it they **** their pants.
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the one from quick time performance blows don't get it when it broke like 3 times they gave my friend a hard time about fixing it even under the warranty
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IMO they arent gonna be worth it for your car other than for sound. Matt you are somewhat correct that you can burn the valves but it is not because of the headers but where they are mounted. burnt exhaust valves happen due to a loss of too much backpressure or running too lean which will result in the valves getting too hot, burn valves. both of these things can happen if you run cutouts. if you are going to install these i recomend that you install them farther back in the exhuast, like after the cats or where they were if you have a o/r pipe to prevent damage.
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I've never heard that before. We never had any problems years ago when we ran shory headers with no exhaust so I don't see how a cut out would be any different.
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