my vote is full exhaust with long tubes.

 

Full exhaust and a tuner(since you are an auto)

 

i like the way my car sounds. i get compliments all the time from other mustang guys so its fine with me. i live in cali so i cant go with offroad h or else i would. and what about the cams? do i need heads with those and how much of a gain could i expect?

 

cant do cams in cali if im not mistaken. not CARB legal.

 

Throttle Body & plenum
Cold air intake
O/R H pipe
Under drive pulleys
Catback, no hp just sounds good

 

if i were you i would get stage 2 cams and leave stock heads you just have to change the springs, i forget who but someone just said they picked up 40rwhp from them with that setup

 

Cams will def pep up your car. Gears are good mod that want net any hp gain but it will the best mod that you can buy for under $200.00....

 

i have 4.10s already but i want to do so much more. so with cams those are illegal in cali? and offroad pipes are also. how many cats does the offroad eliminate? anyone in cali with this setup??

 

o/r eliminates all cats. your car should come stock with 4. get a high flow catted x/h pipe. those are usually carb legal. and cams i dont think are legal anyways. could be wrong. but i know they are tight as heck over there in cali.