I know of three panel filters for the WRX, K&N, ITG, and Blitz. I was just wondering what people think about these three and maybe if they have any numbers to back them up, or personal experiences.
There is an EVER SO SLIGHT increase in turbo noise when you install an aftermarket filter. This increase is dwarfed by the change if and when you remove the resonator.KanosWRX said:
shiv said:The only results I have in front of me are those of the stock car, stock car plus up-pipe, and the full Stage Zero. For the rest, I'll have to go off of memory for now. The up-pipe alone, as shown with the dyno chart, was worth about 9 wheel hp. My pulley, IIRC, was worth an additional 7-9 wheel hp. This brought total output to roughly 200 wheel hp at stock boost levels. The addition of the MBC, which regulated boost to 15psi peak (dropping down to 12psi by 6000rpm) barely increased peak hp. However, it did maintain power higher into the rev range. The tuning of the unichip was worth the extra 15-17 wheel hp. The K&N drop-in filter actually reduced power by 1-2 wheel hp. The resonator mod really didn't do anything measurable except make lots of noise...
But have anyone observed the same on other aftermarket filter panels ? Just interested to know.bedabi said:Here's the original post by Shiv on i-club:
Here's an extract: