I am hoping one of you guys can help me out. I have cracked exhaust manifolds just like every other titan it seems. I was going to buy the Bear River converters hoping that they would pass CA smog testing when the time came. I found a guy parting a 2008 Titan out about an hour from my house and was wondering if they would be a direct replacement for my 2006? He wants $300 dollars for both and supposedly they have 30,000 miles on them.Assuming they are not cracked and they will bolt up should I buy these instead of the Bear River's? I still believe the Bear River manifolds will pass the smog test in Cali unless I get unlucky enough to get a Titan expert for a smog technician. I also think the Bear River manifolds will last longer than any Titan take off manifolds. So do i play it safe get the used ones that I know will pass smog and potentially have to replace them again sometime in the future or do I spend 500 extra dollars now and see if I can sneak the Bear River manifolds by the guys at the smog shop?