Well i already had bought the greddy 4-2-1 ss header thinking that i would not get a full header with my gsr swap, but i did.

Thing is about the greddy header, for a 94-99 gsr, its different than the jdm ones. My jdm header is about 6 inches longer and has the O2 sensor in it. I guess the usdm gsr's had the sensor in the cat...well...

So has anyone found the jdm header to be weak, or the greddy to be strong. It would be more work to use the greddy, but if it made significant more power...

Otherwise i'll just sell it as unused and maybe get a jdm r header some day.

thanks,

d

 

I would just use the stock jdm header and get yourself a jdm 4-1 header.