I found both of these on speed incs website
93-02 LS1/LT1 AUB542046 AUBURN PRO SERIES POSI UNIT $399.99
93-02 LS1/LT1 AUB542040 AUBURN HIGH PERFORMANCE SERIES POSI UNIT $314.99

what is the difference from the Pro Series to the High peroformance series?

Id love to know cuz i do plan on getting 3.73s for my car and would like to know if the extra 80 bucks is gunna make me happier?!?

thanks,
Mike

 

Can't answer your question, but if you're spending that kind of money, be sure to check out the Eaton posi. Supposed to be the best 10 bolt...

 

i know alot of 4x4 guys that have blown up several Eaton units that have been later replaced by an Auburn unit that hasnt failed them while ding the same stuff that the eaton failed on

 

Ok. Don't do that then...

 

Here's their site, maybe the answer is on it.

http://www.auburngear.com/

 

Hey, thanks for the link. It awnsered my question the High Performance seires is bascially an OE replacment. The Pro Seires is an upgrade to the normal OE unit. thanks!