Originally Posted by Vic311
You typed the same google search that I did and got the same result. If there is someone making them they certainly aren't popular.
Don't know what they are doing down under..but here no one is willing to pay thousands for something with little to no improvement over stock.
Xpipe and exhaust customization are where the gains are.
that thread is to do with testin POORLY DESIGNED headers... if you read the whole thing.
look at other tests, they show that headers are a major improvement, especially with forced induction.