My stock 2004 Suzuki Fforenza before any mods.
BMS CAI price $220 (nice) didnt use that air filter used "Power Adder" filter way bigger then the on ethey give you.
Intalled BMS CAI for this car took around 1hr to complete acouple bolts and screws nothing hard.
swap my air filter from the on BMS gives for a bigger one "Power Adder".
Installed lightened UD Pulley.
A little latenite fun on the e-way lol would of went further but damn cops where around radar was going crazy!!! lol.
My 2.25" custom Cat-back exhaust system.
NOPI Exhaust Real Carbon Fiber Shell.
High flow CAT cannon Style (loud) got it free yes it good out of box good.