I currently have a stock DP mated to a Mil.Spec HFC 100cell. I hear lots of ppl saying don't mix n' match but Mil.Spec doesn't offer a DP.

Any recommendations on good DP or just any 3" dia. one will do?

I search and not too many people have Mil.Spec HFC + Brand-X DP.

 

i've got an ams widemouth dp installed with my milspec hfc and no fitment issues. but i don't see a problem using downpipes from other reputable brands as long as they're 3".

 

Same here, just installed an ams wide mouth and a mil spec 100 cel hfc. No problems except when trying to remove oem downpipe.