which flange do you mean,
cyl head, ---same
collectors--- check arh web site, i don't remember but 6.2 probably larger
rear connection to exhaust system--- 6.2 larger

 

Sry just seen this. Im talkin about the exhaust flange that mates with the cylinder head flange

 

same on heads

 

Cool thanx, ill prolly order a set of the 6.2's for my 5.3 then so i dont have to worry about having to go bigger later. i think the y pip exits on the opposite side on the 6.2's thou? if thats the case ill just build my own.

 

y pipe is the same shape, should be bigger tubing.
flange to connect the exhaust to the y pipe is larger on the 6.2
if obx makes the stuff correctly to fit a 6.2, that is the only thing you should have to deal with.

 

Yea ill be doing that. the primaries are 1 3/4 i got that so im gonna assume the collector is 3". Good stuff for future reference for anyone

 

not beat this to death
the collectors between the headers and y-pipe should be 3 "
the connection to the exhaust system on the truck will be 3.5 inch.

are these the ones you are talking about?
that image is flipped , the y-pipe would exit on the passenger side
also that image is probably 5.3 headers, doesn't look like 3" collectors

http://cgi.ebay.com/ebaymotors/OBX-F...211810004r7358

 

Yea if need be i can always get a custom y built. I messaged the seller and the primaries are 1 3/4 but didnt say on the collectors.

 

those look nice, and not a bad price!

 

just get some coated pace setters... they work on a 6.2