Originally Posted by Jayhovah

My searching in this subforum has delivered mostly this information "FI Cars will destroy HFCs"...

What's the story here? Some general google searching shows that the Scooby guys use relatively inexpensive (~$100/ea) magnaflow cats and have them welded in.

My FI build starts almost exactly one month from now and I'd rather go the HFC route than test pipes, if only for the odor. I went ahead and bought some cheap test pipes to get me through the build... unless there is a reasonable solution, I'll probably try what the Scooby crowd is doing and weld in whatever cats they are using after I get the car up and running.