Originally Posted by bookwyse

I have tested all of the above filters using a laptop and logging the results on both town and open journeys. Even running two cars with diffrent filters on the same route together and stand by the cone filter with plenty of cold air feeds. If you run a cone without the cold air feeds then it will suffer from heatsoak but mine doesnt. With mine on the rollers it made 243 with the K&N, 235 with the Viper and 228 with a panel filter. This was all done on the same day and within an hour of each other.

I have spent a lot of time and money looking into this. The three photos above were all taken on the same day after doing some of this testing


And yes they were all mine. I prefer to do myown tests and make my own conclusions where possible.LOL