Easy DIY Horsepower

1. Make ONE hole in the air box underneath the air filter , overall diameter no more than 35mm.

Power curve below, and you will notice it too, especially the new induction noise. :)




Horsepower before and after, using a GTS1000 with a standard exhaust fitted (catalyst).

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Second stage, even more horsepower (green curve)




1. Make the air filter breathe better (first stage above)

2. Remove the catalyst, and fit a less restrictive silencer.





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Third stage, even more horsepower (red curve)



1. Do the second stage mods

2. Remove the “snorkels” inside the air box (Do not make the hole under the filter this big, because it only needs to be ONE at Ø35mm maximum, like you did in the first stage)
This was the first air box I modded, so the hole is too big, and it was before I knew better. :)