[hinterland]

gps= grams per second
hi ive spoke to several tunners about ls1 afm as i have just done a new motor myself wanting to squeeze 400 plus h/p out of it and all of them say that the std afm are only good for about 250 h/p before they max out and they are a restriction on the air intake aswell. once fitted they need to tune the computer but if your doing any mods it will need to be tunned anyway so would defenetly go to the trouble of getting one as there not dear round 50 dollars s/h if you look round.and if you are wanting to achive more than 250 h/p there a must. i can only quote what i have been told as i am no tuner myself but having spent nearly 20 grand on a motor i made shure that i was doing it right.