Mac's got a 1 3/4 header which is one of the biggest.. I'm trying to see how it stacks to JBA's.. I heard they are good.. but since I have an SC and will blowing out allot of hot air the macs seem bigger... anyone running these?

 

I got them on my V6, I have Magnaflows tru duals w/x-pipe and C&L CAI, you can hear the air moving thru the c&l pretty good, not 50 state smog legal