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thanks for the compliments! ok, first things first - the 9% gain is what the 09 models (800R) are reported to have over the 08 models. this is gained by not only the improved intake/air filter, but a slight variation in the cams and maybe other differences, too. owners of the 07-08 models can expect a 4-5% hp gain by adding the 09 intake and air filter (i believe a couple of o-rings are needed for the injectors on this swap, also). porting the airbox would not hamper that 4-5% gain, but you may need to add another opening, or use a different combination of sizes (the frogzskins are made in a number of sizes). the material i used to block off the stock opening was just a piece of abs plastic that i cut from some scrap i had lying around. i haven't received my hdpe (puckboard) yet, but it should be available for me to pick it up (2 hrs away) this week. can't wait to fab some skids for all 3 of my bikes, as well as some well-needed bulletproof cv guards. i will definitely keep you guys posted...
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