Depends on how handy you are with a wrench. I think it took me about 2-3 hours? (I know... slow) The hard part was taking out the stock intake.... installing it took maybe 20 min. If you mean bypass valve like the AEM one, no, you can get a pre filter, I have the Injen one. Its basically like a sock or condom for your filter, it works great and is very cheap. If you mean bypass valve in reference to a "blow off" valve set up in recirculating mode... well, theres plenty, but I imagine you mean the aem bypass valve to keep water out.