I have been debating for two weeks about repairing my rear subs are replacing them,well after looking at the dual voice coil 4 ohm Pyle subs from Walmart .com for 23$ shipped I wasn't losing much.Speakers arrived and the install was tight but no mods were needed yes they are 4 ohm speakers an the stock subs are 2 ohm,I still used them and I am very impressed better and more solid bass than factory speakers so yes it was 23$ well spent .