Quiet Cat-Back Exhaust

[DreadAngel]

Where are you located?

[nedkerry]

Where are you located?

South-East suburbs of Victoria

Firstly whats your location and budget? We can suggest a few good exhaust shops.

IMO, I'd go for a custom 2" or 2.25" mandrel bent mild steel exhaust, hi flow cat, one or two resonators and a twin loop/oval muffler or something restrictive.
Performance wise wouldn't be much, but it'll feel slightly better in the high rpm range.

I'd suggest pairing the exhaust with a good air filter setup with cold air feed and those electronic throttle controllers for better response.

Budget-wise, $600-$800. Midas mentioned a ballpark figure of $900 for a mandrel-bend. I thought that was a bit expensive considering there are reputable brands for two-thirds of the price.
Performance wise, which RPM range? I got told over the phone I'd notice the difference between the 3-4K range. I wasn't sure whether to believe him.
I'm reluctant on a cold air/short ram intake after watching the MightyCarMods video which demonstrated no benefits in performance. However, I do have a throttle controller, throttle body spacer, and pulley kit on the way.

dis guy is on the money^^ i just finished up my exhaust for my b18 eg and i went with a 2.5" mandrel bent system with 2 resonators and a rear muffler and even that isnt too loud imho but it depends on mufflers aswell as if you bo for a chambered or triflow etc etc it will all effect the end result so its hard to make a hard and fast recommendation.

Can you notice any throttle or horsepower improvements in the 3000-5000RPM range?
Where did you buy your system?

From what I can gather from all of your posts, would I be correct in saying that there's a trade-off between noise and performance, and it's not possible to have both?

[Chernoby1]

From what I can gather from all of your posts, would I be correct in saying that there's a trade-off between noise and performance, and it's not possible to have both?

Not possible within your budget*

What you are trying to do is what Honda wants to do... just think about how much money they can spend on designing the thing. Every manufacturer wants to add as much power with the smallest amount of NVH for the mid size / non sports cars.
Their restriction is mainly the cost of manufacturing many exhasuts, so they wont use fancy materials; which as you are doing a one-off are able to do... but using fancy materials = more cost

If you are willing to go somewhat louder, but not tooo loud, thats where things get epxensive again. Working it out therotically is not too difficult, however a 10mm difference in pipe length can get a dramitic difference im loudness (if someone has bothered to do sound wave analysis within the exhaust), so it requires fabrication and then testing and then more fabrication. i would guess that 90% of companies that make exhasuts (especially the japanese folk) are focused on putting that effort into getting more power, not more quite andthat limits your options of doing it off the shelf massively.

Id estimate ~$2k to get it done to what you want and keep loudness to a minimum but getting you a nicer note and potentially some extra (~5%) power.