Got a question for you, I'm about to order a header... And I was wondering if anyone could link me to the header they bought for their truck.. I keep hearing about this Thorley header that everyone got for like $200, but the only one that says it fits my vehicle is $250, the $200 says it fits a 2WD, I got a 4WD, now all the headers look the exact same in the pictures... Does it really matter what one I get?