I was told the newer stage 7 kits don't require the 4 pod filters. I could be wrong, but?There is no such thing as a Stage 3 jet kit for the Vmax. They do actually have Stage 3's for other bikes like the Yamaha Fazer/FZX. The S1 is junk. The S7 eliminates the vboost when done to full instruction and has pod filters. My kit is a hybrid of the S7 leaving the Vboost intact to keep the low and mid range power while still getting the full gains up top that the S7 does.
Other companies had jet kits too. Still none referred to them as a S3 kit.
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