we all know headers give at laeast a 15 hp gain over manifolds, but does anyone know the exact gain form short tubes to long tubes, perhaps dyno test. are long tubes that much surperior then shortys, overcoming the much more extreme intallation and ground clearence problems, or is just a 5 hp gain over shortys?

I know it varys from header to header, i have hookers in my mind

 

every car will react different to mod but my guess would be about 10hp more with LT's.

 

long tubes help out with low and mid range power (if i remember right) better than shortys but other than that I'm not sure of the differences, I'm putting them on the 355