I know this is probably a tired question, but I'm new to the forum and am still trying to find my way around here. I have Arrow slip on cans and mid-pipes on my 07 S2R 800 and want to convert to the full system and dump the udder. My questions are: 1) will I need to change the fi mapping (Power Commander et al) with the full exhaust system or will the stock mapping/ECU handle the change, and 2) are the gaskets/seals between the headers and collector pipe destroyed in the process of disassembly/reassembly (will I need to buy new ones to do this right)? Thanks in advance. . .