Im starting to save for a set of headers and i had a question for some people that ether own or have some good details on either of these....... Im looking at both the ZZP stainless headers with 3 inch catted downpipe and the wbodystore stainless headers with same options. The zzp after the cat is $900 and the wbodystore is $690... other then a BIG price difference what is the difference??