Accord 2002 Suspension Question

Ok. My friend owns a Honda Accord 2002 and he recently put Cosmo Racing dual spring coilovers on. Now whenever he goes over bumps he hears a "thud" noise like its bottoming out.

As an owner of a 2002 Maxima I know your suppose to shave the bumpstops so this won't happen, but I don't know if its the same on Accords. Any instructions or suggestions?

Thanks.