Quote Originally Posted by aaronng View Post
The hytech is a racing header and exhaust set, and sounds very loud. I'd say it would be N1-level.


Peak power figures are the same, but if you look at the mid range at 5500rpm, the toda has an extra 10hp at 5500rpm. Here's the graph. From the midrange, Toda > Comptech. Red = Comptech + Reflash, Blue = Toda + Kpro + VTC


"HotWheelz" a member from k20a forum did the test between 25 stock VTC vs 45 degree VTC with custom header and K&N air filter in place.



http://www.k20a.org/forum/showthread...ight=k24a2+VTC



That shows that ,when he switched to 45 vtc, produces higher mid range power and torque which is around the same with hondata dyno graph you showed so clearly it wasn't from the header.