[Cooter Bleu "Cajun"]

Ok now I baught some shorty headers from Summit racing and i kinda bent the flange on the headers so it leakes with the 2.25in pipes i was wondering because the flange looks to be for a 2.5 or larger piping.

What i want to know is what is the largest pipes someone should go with for this set up

 

[Davids78Bronco]

what do the instructions call for? Why not measure the collector pipe?

 

[Cooter Bleu "Cajun"]

good idear, i think i am gonna do that there