I dont have any first hand experience, but based from a thread I saw on here I would go for BBK's.
There was some hype that the Mac L/T's were causing excessive oil consumption right after install, and in some cases damaging engines. I think it had to do something with a bunch of crap being floating around inside their headers and no one cleaning it out before installing them... something like that.
The oil consumption issue was for the 4V's. Mac headers are cheap, you get what you pay for. I have them, ceramic coated, and I had some fitment issues. I had to take them back to the shop twice after the install because the gaskets leaked. I'm blaming mac but it could have been a poor install job. Now they work fine and I have the prochamber which I think is sweet. If you have money I recommend SLP, Hooker, even BBK. If your tight with money, MAC it is.
I dont have any first hand experience, but based from a thread I saw on here I would go for BBK's.
There was some hype that the Mac L/T's were causing excessive oil consumption right after install, and in some cases damaging engines. I think it had to do something with a bunch of crap being floating around inside their headers and no one cleaning it out before installing them... something like that.