I finally received my CFR slip on pipes this week and am going to install them today. I am taking off V&H monster ovals. I am excited for the better sound that the CFR's provide, but wondering how the fuel map will work out. I am thinking I will probably need to have it re-tuned. FYI- it took about 14 weeks to get the pipes. I ordered them direct from CFR. They were very nice and did respond to me with all my inquiries, but holy cow, they should hire a few more people, unless they want to keep the demand high.