Just wondering if someone can shed some light on the one piece / two piece header market . Which is better or is there really no difference. And how about 4-2-1 vs. 4-1 any thoughts or comments would be great.

 

im not sure on the performance aspect. if you get a cheap 2 peace header weld them together. they will leak after a little while i ve had a couple and they have always worped and leaked. the last 2 cars ive had i just gotten the dc 1 peace header and had no problems with them

 

I was wondering about the leaking...I was looking at greddy they have a new header thats 50 state legal but its a 2 piece. I have their exhaust and i must say its of top notch quality hence the reason for considering their header. Can any one else shed some light on the performance aspect?