I have a 08 V2k Classic LT. I have stock exhaust and want to change to Cobra speedster longs. Do I have O2 sensor in stock exhaust? I think I do but want to be sure. I want to install a FI2000R with the exhaust for fuel managment and just wondering if i need to buy the O2 sensor blocker with the kit. Any advice would be great because im doing this mod on my own and would love some insight from anyone else that did it themself. Seems pretty straight foward.