Hi
Im looking for install dry sump on my project Evo

what is difference between stage 3 pump and stage 4 pump ?

I emailed ARE dry sump and they send me quote for stage 4 and I was searched internet and many people runs stage 3 on their Evo

also many dry sump maker selling evo dry sump package with billet or stock modified oil pump such as AMS dry sump kit

so I was wondering, can I use dry sump with stock oil pump front cover?

any one runs dry sump with air conditioning ?