I can assure you that these are not cheap knock-offs. The 3-1 collector headers for our motor make less power than the log style headers we are selling.

I have a set of Evosport headers on my car now. I lost 15whp after the install and have not gained it back, even with more custom tuning. I wasn't a fan of the log style until they started making proven power. If we had more room to work with, the 3-1 equal length headers would be the way to go....but we don't.