i just got a 3v auto 07 with 90k miles in it. I am planning to make a fun cruiser car. I do a lot of city driving. The car its stock, i just have purchased a CAI and my next mod will be tune and 4.10 gears. Those are the most bang for your buck from what I have read. Correct me if I am wrong.

Any other ideas on how to make the car go fast but without making it loud?

This are the list of mods I think they are too expensive, loud or not worth the hassle.
LT headers
62mm throttle body
Mufflers or O/R pipe

Any mods that you can suggest to make the car still reliable and suited for comfort driving without loud cabin noise? Or that’s just it.

Supercharging is not an option.

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