Quote:
Originally Posted by l0aded
By the sound of it adding an aftermarket header will make the car much louder. Is the difference as pronounced as going from stock catback -> aftermarket?
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Headers seems to be the mod that makes the car much louder than any exhaust system. When you add a header to an aftermarket cat, or header-back system, even more so.
For an example, where I autocross, we have a strict noise limit of 96db from 60' at Wide Open Throttle (WOT). A guy places a sound pressure meter at a section of the course where everybody "should" be at full throttle and records the levels of people as they go by.
I have one of the loudest aftermarket cat-backs available which is the Buddy Club Spec II which is a single pipe with a small resonator just after the cat. I only blew 90db.
There was another guy there (he's a member here but I can't remember his username) that was running a full header, overpipe, catless front pipe and cat-back. I believe it was the Agency Power system but don't hold me to it. Even though his cat back would have been MUCH quieter than mine, he still blew around 96.8db at WOT. While it sounded AWESOME, it was definitely much louder than me.
Scott