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Supersrpint and Eisenmann are the only two companies that make a direct bolt on back box for the S4/GT/GTS
I have an Eisenmann back box in my parts stash. List price from Eisenmann - EUR1800 for the beautifully made stainless muffler. Came on my ex-German 1990GT.
Nowhere near as loud as an RMB - more like a standard exhaust turned up to 11.5 Some friends were telling me, it made the 928 sound a bit like an aircooled 911. Go figure...
We sell a complete Cat Back 2.5" mandrel bent system including a muffler. Muffler can be reversed for loud & not so loud results.
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Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission? George Layton March 2014
928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
09-08-2017, 11:18 AM
George Layton March 2014
