URD MAF calibrator or headers??

I have a k&n CAI, flowmaster and a throttle body spacer. I am wondering which would give me better gains.

 

u can get the maf cal and tune up ur already bolt ons and get the most out of them. u can get the headers but it wont be as tuned as if u get the maf cal. i say get the headers first, then get the maf cal and bring them all into one

 

Headers makes your truck fun to drive. MAF Cali, makes it perform the way it was meant too

 

noticed you have the JBA headers skim...how do you like em??? and is the y pipe a good choice to go with when buying the headers or does it even make a difference i have seen some mixed reviews on the y pipe.