This its a part for 1 door for repair window regulator on Dodge Viper front left and right fit same... WE SHIP SAME BUSINESS DAY IF YOU PAID BEFORE OF 4:30 PM MOUNTAIN TIME. SORRY WE DO NOT OFFER A MANUAL OR INSTALLATION PROCESS UNLESS THE DESCRIPTION SAY IT. here on power windows solutions we want our customers find better choices to solve problems in automotive car doors that's why we working all days to bring good products at really good prices also, we want to save a lot of money too, we see a lot of parts can be fixed changing only the broken parts,if you need any help contact us or any question you help send an email to [email protected], our website its www.powerwindowsparts.net,we be ready to solve any issue you have with our product. we can make special prices if you are larger buyer just send us an email and we answer as soon we receive the emails usually we respond same business day.we be happy to solve any issue you have so don't desistate to contact us. "WE ARE AUTOMOTIVE DOOR EXPERTS"