Yes. In FIN R4WD the restrictor size is 35 mm with pump fuel and 34 mm with ethanol.

http://www.rallism.fi/content/en/1/10090/FRC.html

"The SM(FRC) vehicle classes
Finnish championship titles are awarded separately to drivers, co-drivers and teams and also separately in four-wheel drives and two-wheel drives. There are the following two four-wheel drive vehicle classes and two two-wheel drive vehicle classes in FRC:
SM(FRC)1 or Super4: FIA R5, Super 2000 Rally (2.0 and 1.6T), FIN R4WD (also incl. WRC cars homologated 31.12.2002 or earlier)
SM(FRC)2 or Production4: FIA N, FIA R4 and FIN N4WD
SM(FRC)3 or R2: FIA R1 and FIA R2B cars up to 1600 cc
SM(FRC)4 or Super2: FIA R3 (both R3T and R3D), FIN R2WD and group N up to 2000 cc, Super 1600, and diesel cars in groups N and A