i just got my greddy header in today for my 98 GSR and it didnt come with the new gasket...and i know i should replace the main gasket but should i replace the donut gasket at the end of the header as well? and also does anybody know a good website to order the gasket from? like an OEM gasket or something high quality?

 

bump before bed

 

for what size collector?

 

bolt on greddy header i think 2.17"