[ZRrrr]

Cats in stock form are supposed to run 87. This is always an interesting topic. Many aftermarkets tell you to run 91 or higher if adding their parts. Funny thing is that they are almost all from out East and pretty near sea level. Edmonton is just over 2000 feet and if you hit some areas of Swan Hills you can be over 4000 feet. So I ask this....with a mod pipe and/or very slight squish band changes, can you still run 87 comfortably here? There seems to be those that think you can and those that think you can't. Any opinions?

Not trying to hijack the post, but this does open up some good dialogue.