Anybody have a part number or some info so I can get a new one. Pretty sure mine is bad and can't find one at local auto parts stores. This is the check valve that sits on the front of the Brake Booster. Not sure if it is specific to TTA or do all GTAs have the same one ?

 

I'm fairly sure they are the same as all the F-bodys

 

Cannot get confirmation on a fit from websites I have tried - everything I try says it does not fit vehicle----although Dorman 80190 and Delco 179-1322 and delco 179-1266 all look correct. They are really the only ones that DO look right. ???

 

I'll go look at the tta and my formulas to compare.

EDIT: annnnnnnd The tta has a black one that's a bigger diameter and the rest of my birds are a white/ off white. So unless someone has changed the tta valve, it is different from the rest. I'm guessing because of the boost on the tta

 

BOTH openings need to be 1/2"

 

This is an older thread, but FWIW...

The 82-92 Firebird Parts and Illustration catalog lists two different check valves. While the catalog specifically says the TTA uses the same valve as the 5.0/5.7 (#18003614), the black valve pictured looks an awful lot like the valve used on the 2.8L and 3.1 from 87-92 (#18012017).