Quote Originally Posted by 94vtirozguy View Post
dyno for one car with one header, and comparing to a different car with different header is useless.

In summary you cannot expect the header bought off ebay to match one from Hytech or SMSP. Its how the item buyer evaluates how much they are prepared to cost vs gain. You are more likely to get basic modifiers who will settle for somethign generic and then you get people who highly modify their car who want something for their setup for maximum effect.
its called a cost benefit analysis not cost vs gain
if one person to buy a branded header to make 15whp for $1000
and another person bought a replica which only made 12whp for $600
the extra 3hp wouldn't be noticeable realistically
so the concept of this that yes its a replica it may not produce the EXACT amount as the original but for the fraction of the cost one is able to extract similar or very close power gains of the original form