does anyone know if the rs-r/invidia/skunk2 exhaust will work with a JDM 4-1 header or will it just bottlekneck my exhaust?

 

i have the RSR and it flows extremely well and also the fact that the piping is atually 2 5/8 so it is a tad bit bigger than most of the 2 1/2 you get and smaller than the not needed turbo 3'. overall it is very good in my opinion , i think you might lost a tad bit of peak prob like .5 or something but it'll give you good amont of lew end torque which you will need since we all have poor honda/acuras.