i've got a c&l plenum, bbk 75mm t/b, c&l inlet tube and c&l 80mm MAF for my 2001 mustang gt. My question is if i put that 80mm MAF in my car along with the other mods will i have to get a tune? also for my yr should i buy long tube headers? do they give pretty good horsepower increase?

 

has anybody done this???