It is. I don't know if you went through with buying this alternator, but I made the mistake. To give them credit, they shipped it and I received it on time, however, the alternator did NOT fit my car. He sent me the single bottom mount version when my car requires two. I tried to return it, and the seller (mike) refused even though it was never installed. He even lied to me saying he installed it on a similar car and its an "easy" install, just use "spacers", never acknowledging the fact that it didn't even have the correct mounts.
Knowing that I couldn't get my money back, I used an angle grinder to modify the alternator so it would actually fit. I still couldn't get the pulley aligned with the rest of the components, but it was close enough. I started my car, it charged for a few seconds, than started making a whiny noise and burning up to the point of smoking.
All in all, I wasted $300 and had to have my old alternator rebuilt for $200.
After all the headache, I could have just as well bought a alternator custom made for me at
High Output Alternator Hi Amp by HO
... Or waited a few weeks to buy a Bosch HO from jcwhitney.com
-Joe