the main reason that i ask is because since the gauge is only a 1600F gauge, it will be maxed out if i install it on the mani. it wont be accurate once it hits the 1550 mark or so anyways. autometer says so. plus, the autometer instructions say that on turbocharged vehicles, place the sensor within 1 inch from the 02 housing on the dp. i also have a lot of good reasons for putting it on the dp that i have gotten from tuners. just checking what my FAMILY thought. ;-)