Is the flange I need for cat to a 3 in downpipe?

[holdbrooks]

http://store.summitracing.com/partd...&N=700+4294923429+4294820497+115&autoview=sku

I am not able to measure the bolt hole spacing of the down pipe but it seem about right. Can someone verify?

 

[Piratetip]

Eliminate the confusion.
https://935motorsports.com/catalog/product_info.php?cPath=79_14_16_33_220&products_id=1447