Originally Posted by +fireamx
No matter how well designed a header is, isn't the actual increase in H.P. directly related to how "restrictive" the stock exhaust manifold is?
Does anybody here really know how bad, or how well the "stock" manifold flows?
it is 1 of the "big flaws" of the slk32 and i am pretty sure it applies on our cars as well...
if this thing can net around 20+ horsepower i am all for it when I start doing my engine work... sure it is not cheap, but what can you expect the company has reputation and any work on these engines is not cheap... I am sure you can custom fabricate a set that is equally as good for less, but that will be custom work and you will have to know what you are doing... they did all the work for us here... and besides there is very little demand for this product so i am happy they at least created one for us..