I have a couple questions about these and yes I read all 9 pages of the other post. My exhaust is bone stock. Will I need anything other than thr O2 sensor harness extension, downpipe to ubend gasket, and some copper RTV to complete the install? I will be buying a set of bolts just in case something breaks during removal. What gasket do I need specifically and where do I get it? Will I really need to get a bent dipstick tube and if so can they be purchased pre bent? Also, my car is lowered quite a bit. Will I have problems with how low the downpipe extends below the vehicle? The stock ubend hasn't given me any trouble yet.