You cannot buy these from your local dealer.  They make you buy an entire supercharger. 

These are common to break and go bad after time since it is made primarily of plastic.  It's common for someone to break off a vacuum port and now you've found a place where you can buy the part at an affordable price. 

These work for the majority of current Eaton Superchargers.  For example these will work for sure for the following vehicles:

97+ Pontiac Grand Prix GTP

04+ Pontiac Grand Prix GTP

04+ Chevy Impala SS Supercharged

04+ Chevy Monte Carlo SS Supercharged

97+ Buick Regal GS

96+ Buick Park Avenue Ultra

2003 Ford Mustang Cobra

1999-2004 Ford F150 Lightning

2003 Nissan Frontier

Supercharged Holden Commodore

Some Vehicles have a stud on the front of the bypass valve where the boost solenoid bolts to.  This does not have that stud, but you simply can zip tie the boost solenoid in place.  It is not necessary to bolt the boost solenoid down.

If your vehicle is not listed just compare the picture in the auction to what you have.  If it looks similar it should work.  Just compare the mounting of the unit.  They all pretty much do the same purpose.  Please verify and know what you are buying as we will not accept any returns or give refunds because you purchased a part for an incorrect application.  We pay too much in ebay and Pay Pal fees where we are unable to accept returns to keep our prices and shipping costs competitive.

Thanks for shopping!