Have been asked a couple of times how to open up the airbox inlet to 4", I did mine years ago with great results but didn't video anything But I always take pics so I put this together from stills. Combining this with a K&N filter (or a modified BMC filter), Cobra Head mod and going 3" from the MAF housing to the turbo makes a significant difference, but be warned, MAF voltage will rise significantly and unless you have a way of controlling that, like a remap or the older JayCar unit, you will be in constant limp.
30 апр 2018