Originally Posted by flinchy
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.
The Google search you linked to turns up one or two companies making anything approaching decent headers and a lot of promises that weren't kept. Fact is the S65's stock headers leave very little room for improvement without significant added cost as others have mentioned. Sure you can buy plenty of aftermarket headers that actually decrease overall performance and use lesser quality materials; nothing new here.
And you are dead wrong about engine harmonics; so that's 2/2 for you. It might be time for you to stop dumping on a photo thread if you're not only going to be wrong but be antagonistic at the same time.