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951 cat back on a 931

 
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kcoyle  



Joined: 15 Jan 2011
Posts: 712
Location: Long Island, NY

PostPosted: Thu Apr 19, 2012 9:22 pm    Post subject: 951 cat back on a 931 Reply with quote

I've read somewhere here that the 944 turbo/924 turbo catback section is basically the same part but never saw pics of it, so here they are. This was a bolt on swap from a 1988 951 to my 82 931. Same front 4 bolt square flange, same front hanger mounting, same pipe shape and diameter. The only difference I see is that the 944 turbo uses a different hanger arrangement at the muffler, but that has no effect on the install since we just use a big ol' bandclamp that goes around the muffler.
So if you need a muffler, look for a take off from a 951, alot of those guys upgrade to bigger/better catbacks.
Thanks to Kevin (epic2112) over at the pelican forums for the catback.
I also think I picked up 1 psi on the boost gauge as well, probably since the hacked up muffler arrangement was necking down to 1.75inches.






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1982 931- Stock with MBC at 8psi

Relax, all right? My old man is a television repairman, he's got this ultimate set of tools. I can fix it.
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ideola  



Joined: 01 Oct 2004
Posts: 15550
Location: Spring Lake MI

PostPosted: Thu Apr 19, 2012 9:49 pm    Post subject: Reply with quote

Also, notice that the 951 unit has a very nice reinforcing plate at the main pipe inlet to the muffler. This will make the unit last a lot longer, as the early 931 units didn't have this and will often break at the muffler inlet.
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Rasta Monsta  



Joined: 12 Jul 2006
Posts: 11733
Location: PacNW

PostPosted: Fri Apr 20, 2012 1:34 am    Post subject: Reply with quote

That rear rubber hangar doesn't look too good to me. . .
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Toofah King Bad
  • WeiBe (1987 924S 2.5t) - 931 S3
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kcoyle  



Joined: 15 Jan 2011
Posts: 712
Location: Long Island, NY

PostPosted: Fri Apr 20, 2012 8:37 am    Post subject: Reply with quote



Cmon', I finally had something just bolt on to this car without tons of work and extra crap to replace!
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1982 931- Stock with MBC at 8psi

Relax, all right? My old man is a television repairman, he's got this ultimate set of tools. I can fix it.
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