Intercooler I.D

[extranjeo]

I picked up an 86 GN a few months ago, and I am trying to identify what mods have been done to it. The intercooler has the factory tag on it and the passenger side neck has Duttweiler stamped into the aluminum casting. Is this a factory piece? Sorry for the dumpy pics but pass. and drivers side are shown. I can get into much more detail if need be. Thanks in advance.

 

[Squid4life]

Stock intercooler with a dutt neck welded on, fixing the big restriction in the system.

 

[O SO LO]

This is what was done...

http://www.gnttype.org/techarea/turbo/duttneck.html