In a message dated 2/13/02 11:52:06 AM Eastern Standard Time, sean_dmc1@xxxx writes: << True. This alone would not result in an marked increase in acceleration or bhp. Best estimates of these filters is a 5hp gain. >> I ran my EFI Delorean on a chassis dyno with and without the entire air filter assy and housing and only saw about a 1 hp gain without it.