My HCH I with 165,000 miles needs a new catalytic converter. The Honda place quoted $1500 to repair it.

That seems like an awful lot. Can't I just buy this cat: http://www.1aauto.com/1A/CatalyticCo...crn=&ovtac=CMP

And then have my mechanic friend install it for me for much less than $1500? Or is there something I'm missing?

Thanks

Dan