I have to do the 30k interval tuneup on my 3FE soon, and I'm using @jonheld 's master list for parts. It has the EGR valve, gasket, and modulator on it. the EGR valve is no longer available, but the gasket and modulator are still available. The gasket is $6.08 so why not, but the modulator is $74.07 which would be quite a large percentage of the total $$ for this tuneup. I know I'll be fine without it, but I'm wondering if it's one of those things I should buy and replace while I still can (before the part goes NLA.) I don't even know what the EGR modulator does. Someone let me know what they think. Thanks in advance.