hi welcome to the forum! rock auto is a pretty decent company. havent seen to many replacement cats available and i myself havent had to replace mine. is it still under warenty? im sure its either going to fit or be really really close and can be made to fit. i wouldnt be afraid about buying it. you can probably return it if it doesnt work. if it does or doesnt fit please post about it to let us know it will help out the other members.

 

PO420 no more!

OK, I went ahead with the replacement cat for the 2008 Reno from Rock Auto made by -Eastern Catalytic-it was $182 shipped. This part installed Flawlessly with perfect fitment , came with all new exhaust gaskets, mounting studs & nuts. No modification was necessary and that can be odd for the aftermarket. Only really need a good basic 3/8 drive socket set to do the job. Oh,and enough extensions to reach a good 12inches for one of the top converter to exhaust manifold nuts that is kinda tucked between manifold runners. Installed over 600 miles ago and still No PO420 Engine Light so far so good.

 

Sounds like it was a good purchase. Good to know it fits well.