The federal government published in October 2010 a special tax relief named RECOPA (Regime Especial de Tributação para Construção, Ampliação, Reforma ou Modernização de Estádios de Futebol) with the aim to attract investment projects for modernization of football stadiums in Brazil by reducing the tax burden. The regime is also applicable to companies who provides services directly to FIFA. Under this scheme exemption from import duties and additional tax incentives are possible however to fulfil necessary requirements is not as easy.

Also of interest are ICMS Agreement No. 108/2008 and No.39/2009 which build base for exemption of certain sales transactions.

If you plan to invest in Brazil you should be looking in all these available exemptions