I have finally bought a m140 from snap on tig/mig combo. I plan on making my own custom intake mf for my 03 350z has any one made there own before and dose any one have any ideas or imputs, I have a 03 with jwt tt kit jwt cams and springs, arias extreme duty pistions carllio rods arp main rod and head studs hr oil pump cosmetic hg. with all that said is there any formula to making a intake mf or just cut weld and go?

 

Dont do it

or better yet, do it, and do a before/after dyno to see if there are gains/losses