I apologize if this has been covered before, but I searched and didn't come up with much.

I've heard of S2000 owners gutting the cats on stock exhaust. This is obviously not much more than a sound mod, because you're not going to gain a significant amount of power by freeing up such a little amount of air flow.

I'm really interested in a sound clip / video of a gutted cats with stock exhaust to see if it's something I'd like. I honestly don't see myself putting aftermarket exhaust on my S2000 for the simple facts of it's my daily driver and I simply don't like the sound of four-cylinder hondas with exhaust (no offense to anyone here.) However, if gutting the cats produces an agressive, yet subtle (read: quiet) sound out of the stock exhaust, it may be something I look into doing.

For those of you that have performed this, did you experience any negative side-effects?

Thanks in advance.

 

The S2000 doesnt sound like your stereo typical four cylinder Honda. Gutting the cat with the stock mufflers will make it sound like ***.

 

LOL!


on a side note, there are some clips on YouTube, IIRC, of some 2004+ S2k's that had gutted/high-flow cats and removed resonators. There was a slight change in exhaust note and loudness.

 

theoretically wouldnt it serve as the same purpose compared to a test pipe???

 

Actually, a test pipe will net you some very decent gains for the price. The S2000 responds very differently to mods over other similar setups, like a b-swaped civic. I will say your much better off removing your cat and keeping it and just spending the 100$ on a test pipe. You can sell the S2000 cat for MUCH more then you can a test pipe.

 

What elements of the exhaust does the test pipe remove? Just the cat? Thank you.

 

yes. test pipes are a direct replacement for the cat.

 

I may spend the ~$100 just to see how this sounds. If it gives me the sound I'm looking for, I'll be quite happy.

 

Yeah, just the cat. You will want to pick up one or two defoulers to fool your factory ECU.

https://honda-tech.com/forums/honda-s2000-5/official-s2000-how-diy-2162522/

 

Excellent! All I need now is someone who's done it before, so I can hear what it sounds like.

 

youtube

 

get yourself a high flow cat, since a test pipe is illegal, waste of money, hurts environment, makes exhaust smell bad, and doesn't gain any more power than a high flow cat.

and get yourself an apexi ws2 exhaust/muffler, whatever is available for your s2000. It will give you a low deep tone and never gets high pitched/raspy.

and to help out with low deep tones, get yourself a short air intake.

 

Any car hurts the envioronment, Test pipes are NOT 100% illegal, DEF not a waste of money since hi-flow cats cost more than test pipes.

I would beg to differ that a 70mm test pipe offers the same minimal, if any power gains that a hi-flow cat does.

Also, the WS2 exhaust is coated mild steel aside from the muffler. get the WS2, HKS Hi-power, Tanabe Super Hyper, or Neuspeed if you want a quiet S. Mine is quiet with the J's 70RS but i think the turbo helps out a little bit with that

 

I read the title, and had flashbacks of thailand.

 

I guess what I'm trying to say is I want a "stock" like noise level (not much louder than stock) with a more aggressive tone. Sorry if that doesn't make sense.

Not having a cat won't be a problem; South Carolina does not have inspections, and I don't believe there are any laws enforcing the use of a catalytic converter. I could be totally off on that, though.

 

Stock AP2 w/ removed resonators

listen to that.

 

another s2k w/out resonators on stock exhaust

ap1 with stock exhaust, berk tp and removed resonator

finally, one with no resonator under load

 

After hearing those videos, I don't believe I'm going to go this route. Definitely not the sound I was going for.


Okay, IMHO, it sounds like crap. Hehe.

 

glad i could help lol

i had considered doing the same thing you wanted to; but i decided against it.

 

Those videos are with NO RESONATOR! Were talking about removing the cat and keeping the resonators. There is a huge difference there!

 

removing a cat from a car is illegal. You can replace a cat, but not remove it.

 

http://www.youtube.com/watch?v=Gjj4dGOjQWk

 

ive heard plenty of videos on youtube on s2ks with stock exhaust and only a testpipe. in my opinion it sounds like a Z. the testpipe will also cut out the drone during highway cruising. also bumps up the power nicely over stock cat. could be worth a shot for you i would almost bet you would like the sound of a testpipe on your stock exhaust just make sure you leave the resonator on your exhaust.

o btw a berk testpipe has an O2 fix built in. ive had mine on for 6 months with no cels

 

This is true. I think I may purchase a test pipe and see how it sounds without the cats (but keeping the resonators) before I spend money on a nice, quiet (expensive) exhaust system.

 

you obviously dont own an S... I can tell by your terrible response... you most likely own a civic since a WS2 exhaust is the cheapest name brand exhaust you can buy... and it didnt help with the short ram intake... cuz u make a lot of power sucking in hot air... honestly man, stay in the civic forum, cuz ur just taking up space... a test pipe for our cars is not a waste of money, and it will flow better than a HFC... berk even admits it...

thanks captain obvious...