Busher's 3 downpipe fitment
#1
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Busher's 3 downpipe fitment
I bought a used Busher 3 downpipe that was supposed to my application. When I opened the box, I noticed that the flange didnt have the beveled edge that mates to the doughnut gasket. From looking at it, it seems that it was either designed to fit without the doughnut or its for a completely different application. Can someone confirm either or? Thanks.
![](http://i114.photobucket.com/albums/n255/18bora/IMG_1121.jpg?t=1256776358)
![](http://i114.photobucket.com/albums/n255/18bora/IMG_1121.jpg?t=1256776358)
![](http://i114.photobucket.com/albums/n255/18bora/IMG_1122.jpg?t=1256776407)
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from what i remeber the br dp , does not use the factory donut gasket , it uses a br gasket thats provided when u buy a br downpipe ,
btw , i should have one laying around id have to look
btw , i should have one laying around id have to look
#5
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The buschur downpipes are not designed to use a donut style gasket. You can either use a round flat exhaust gasket or high temp copper rtv.
My friend is a tech for Ford/Mazda, when I had the Buschur downpipe he got a 2.5" round copper gasket that the mazda's used. I tried it out and it worked perfectly with no leaks. Its hard to tell from the picture below but its actually a crush style gasket.
Middle gasket:
My friend is a tech for Ford/Mazda, when I had the Buschur downpipe he got a 2.5" round copper gasket that the mazda's used. I tried it out and it worked perfectly with no leaks. Its hard to tell from the picture below but its actually a crush style gasket.
Middle gasket:
![](http://www.neiu.edu/~asaakian/Exhaust/Project%20Hush/Gasket.jpg)
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So did you replace the buschur dp with another brand?
#13
i had the same question as the op. thanks for all the replies.
however i noticed that the spring bolts and the donut allowed for the engine and exhaust to move. The br downpipe doesnt have a flex pipe on there. does this mean it is ok to have one solid fixture from the O2 housing all the way out back? or are we assuming that the rubber hangars are enough for the engine flex?
however i noticed that the spring bolts and the donut allowed for the engine and exhaust to move. The br downpipe doesnt have a flex pipe on there. does this mean it is ok to have one solid fixture from the O2 housing all the way out back? or are we assuming that the rubber hangars are enough for the engine flex?
#15
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Go to Mazda dealership. Buy the RX8 gasket for the exhaust manifold to catalytic converter connection. Its the middle gasket from the picture I posted a couple posts above.
I used that gasket with my Buschur turbo back exhaust with ZERO leaks. I just got another bushcur trubo back and I will be using that gasket again.
I used that gasket with my Buschur turbo back exhaust with ZERO leaks. I just got another bushcur trubo back and I will be using that gasket again.