Biffle and 3M renew their contracts with RFR

Biffle and 3M renew their contracts with RFR: "Roush Fenway Racing announced Sunday that both 3M and Greg Biffle have renewed their contracts for three more years. The new contracts will take 3M, Biffle and Roush Fenway Racing through the 2014 Sprint Cup season. 3M has been a Roush Fenway partner since 2005 and Biffle began his NASCAR career with the team in 1998. Terms of the contracts were not disclosed."