bigger maf...new tune?

steveb24

New Member
Nov 28, 2005
555
0
0
wilmington, DE
when going from my stock 80mm to a c&l 85mm kit that im looking at, will i need to re-tune my gt's tune thats on there now (because a shop did it), or do i simply use my tuner to select my new maf size myself and it automatically tunes it for me?