To fit a Keihin carb on a GG PRO model you can fit them straight into the standard inlet/reedblock. However they are very tight and the angle of the carb isnt quite right. On the RAGA models where a KEIHIN is std. they fit a complete different reedblock and inlet assembly. This is the better way to fit the Kiehin carbs on a GG Pro.....The complete kit contains reedblock,inlet manifold,inlet rubber, angled spacer, 3 gaskets, 2 clips and 4 bolts.