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usually a after market cone filter is about 3" diameter where it meets the intake pipping....what this really basically is .is just an adapter to put a 6ish inch filter thing.....(not sure if im explaining it correctly) and besides it making the interring bigger it has a rounder edge which they say it smoothens out the air so it can get in the faster and smoother.....thats how i would explain it....i think thats how it works
Grassroots did a build a few years back and tested all the bolt on performance stuff and with I/H/E and popcharger as aposed to basic filter adapter the got less than 1HP gain and about +2 gain in torque.
Grassroots did a build a few years back and tested all the bolt on performance stuff and with I/H/E and popcharger as aposed to basic filter adapter the got less than 1HP gain and about +2 gain in torque.
well 1hp gain and 2lbs feet of torque for $100 is alot on a N/A motor so i have to endorse this unit , plus i have read where ppl have recorded about 9whp with a CAI...
