Buying it from JDC was a good option, Paul helped me with a lot of questions and great communication. I had the GSS342 and bough the new version that improves better flow, I had issues with the installation kit ( for evo 8) so I decided just to modify my OEM hardware ( the white washer) and use the pump. Works perfect !! .
About the installation kit, I only use the filter. I never figure out how to use the black rubber o-rings bc it suppose to be a replacement of the OEM white washer also I did not use the bottom rubber support bc it was to big and did not allow me to close the bottom bracket assembly.
I bought other parts from JD and they always happy to help and fast response