Ok I am looking at this header for my 07 AT sport and when I look at the dyno numbers it is saying max hp at4200. That cant be right? can someone explain.

THanks

Joe

 

the only thing i can think of when it says that is that it generates its max hp is at 4200 rpm? other than that i dont know lol.

 

The Manual Fit we tested as a baseline put out max power @ 5800RPM & Max Torque @ 4900RPM. I actually like having more power lower instead of spooling up to it.

I have a dyno chart from a while back, it is a baseline compared to my run (please, don't ask why my run was so low). With mods you can see the car makes more power down lower.

Things to remember here; 1) it was on a Mustang dyno which typically reads lower 2) Calgary is not at sea level, in fact we are 3450ft above sea level which also impact the power output.

 

So the header actually looses torgue between 2500-3100 rpms that is right where I drive most days going and coming to work so that would be a bummer.

 

Is there a better header that is smoother in the torgue and hp that the weapon?

 

probably DC header. i havent tested this header for myself yet though.. but having seen both in person..

dc header piping is a little bigger than stock piping.
weapon r street header piping is bigger than dc header piping.

dc header piping seem a little more longer and pipe bending seems smoother.
weapon r street header piping seem a little more curved than dc header.


there are a few postive dc header review threads in the exhaust topic area.