Resonator High-Flow Cat for N/T

[Mattitude v1]

I got a 99 N/T with an N-1 catback, looking to get a high-flow cat and need some help. Is a resonator the same thing as a high-flow cat? Or is it illegal and will not pass emissions? Also, I need some recommendations on a good brand high-flow cat or resonator. Haven't seen much more than those $30 eBay ones and that's not happening. Has anyone done a high-flow cat on an N/T and noticed a difference in power and sound? Details please.

 

[Topple]

The one that seems good to me is the Hahn 3" Max Flow Cat. The only thing is I dont know how it fits into different exhaust systems, and downpipes. Anyone help a little?.. I'm intrested in getting this done mysef.

Link... http://www.hahnracecraft.com/hahn/parts/cats.htm

 

[Mystic511]

No, a resonator is a resonator, it's suppose to make your car more silent, but usually all it does is clean up the sound (gets rid of some of the raspiness). I know you're not looking for one, but since it was brought up, I just want to complete the thought:

There are different kinds of resonators, I forget the names but one is an open chamber and it works by slowly down the air and having the sound bounce around in a chamber, one's a deflection type where there are plates inside the chamber to deflect sound back on itself, and ones a glasspack, which is what most straight through mufflers are made of.

As for high flow cat's, i think all cats made for a 2g will fit. You'll want to find a 2.5 unless you're specifically building a 3 inch exhaust to prepare for a turbo kit or something.

 

[jl98]

our cars already have a resonator on them any way. and if you don't have a bunch of mods you are going to lose some power going with a high-flow cat plus it'll be raspy around 2-3k. I did on mine before i went turbo and didn't even want to drive it until i got a new exhaust. If i was to do it all over again, i wouldn't have cut the cat off or put a high-flow on. I would have just gotten a new straight through muffler or a cat-back.

 

[Mattitude v1]

I need a recommendation for a high flow cat for a 99 NT with an Apexi N1 cat-back. All I've seen online is OBX for about $60 and other brands I haven't heard of for hundreds more. Is there a difference? Has anyone used an OBX? It claims to increase horsepower by 10-15. Reasonably speaking, how much horsepower can I gain and what is the difference in sound?

Also found a Ractive Exhaust Resonator that replaces the stock cat. Is this legal? Any info on this is appreciated. Hook me up with some details peeps!

 

[miamieclipse]

I need a recommendation for a high flow cat for a 99 NT with an Apexi N1 cat-back. All I've seen online is OBX for about $60 and other brands I haven't heard of for hundreds more. Is there a difference? Has anyone used an OBX? It claims to increase horsepower by 10-15. Reasonably speaking, how much horsepower can I gain and what is the difference in sound?

Also found a Ractive Exhaust Resonator that replaces the stock cat. Is this legal? Any info on this is appreciated. Hook me up with some details peeps!

, sorry they said they get 10-15 hp, i just had to laugh. No way you are going to get that much hp. IMO brands dont really matter, (i dunno much about this cuz i live in south fl but if it snows where u live u might want to get something that wont rust easy) otherwise i would just get a hi-flow cat off ebay $50 shipped 2.5" diameter or something liek that.

 

[Thunderskull]

The hi-flo cats you get off ebay are typically resonators/test pipes and not cats at all. This is true for the 1gs and 2gs. Buschur makes a decent high flow cat for $90. You don't want to get caught without one on your exhaust. Plus, you don't want a test pipe since you need a little bit of backpressure in the n/t engine whether it's a 4g63 or 420a. I bought one of the ones off ebay and found out the hardway. I installed it in my car, and I lost some low end power with it. It's just my .02, but I'd go get a high flow cat as opposed to one of those ebay things.

 

[Mattitude v1]

So something like this is just a resonator and won't pass emmissions?

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=2481591895&sspagename=STRK:MEWA:IT

It doesn't look like a cat. I checked out BuschurRacing.com but they don't show any pictures. Any other sites would be helpful.

 

[GSGoinFast]

So something like this is just a resonator and won't pass emmissions?

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=2481591895&sspagename=STRK:MEWA:IT

It doesn't look like a cat. I checked out BuschurRacing.com but they don't show any pictures. Any other sites would be helpful.

that looks like a resonator to me

 

[c5chris]

I would only go with 2 high-flow cats on the market: RandomTech and Magnaflow. I use RandomTech on the C5 and it gave me around 5-8 rwhp on the car.

Magnaflow is the one I bought for the GSX. It is CARB legal in 50 states and definitely legal on the GSX since it is a 5+ year old car. Supposedly they allow you to replace a cat in the event of a broken OEM one or for over 5 years on the car.

Here is the one I have for the Eclipse, waiting on a full SS downpipe.
Magnaflow Cat Mirror Finish

I thought of not adding a Cat to the DSM but Im here in Cali, and 5 HP lost to emissions isnt that bad - and legal.

 

[green95hrcgs]

Exileracing.com sells some direct fit cats for our cars. I think they run $115-125. Thats where I am going for mine.

 

[92awddsm]

I have a 3" carsound high flow cat which is made by dynomax. Good, 50 state legal cat for cheap. I paid $42 shipped on ebay from performance-curve.com You should check them out.

 

[Mike1992]

Here ya go CLICK ME! Same people I got mine from and pretty cheap to.

 

[92awddsm]

They are in Roanoke, Va. I got mine two days after I ordered it.

 

[Mike1992]

I have a 3" carsound high flow cat which is made by dynomax. Good, 50 state legal cat for cheap. I paid $42 shipped on ebay from performance-curve.com You should check them out.

Ahh, you got yours $4 cheaper than me

 

[92awddsm]

Yea, but I wouldnt be able to remember what I paid if it wasnt for my wife. She has organized my "car file" here next to my pc. She saves all the receipts from my dsm expenses. Thats even how I knew who I got it from. Its been a while ago.

 

[Thunderskull]

So something like this is just a resonator and won't pass emmissions?

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=2481591895&sspagename=STRK:MEWA:IT

It doesn't look like a cat. I checked out BuschurRacing.com but they don't show any pictures. Any other sites would be helpful.

No, it isn't a cat. All that is, is a resonator. It's just like the one I bought for my 1g only without the extra holes . The Buschur high flow cat looks like a cat. Mach V motorsports sells the Buschur high flow cat, and there is a picture of it on their site. The address is http://www.machv.com/busrachigcat.html . They are only made in 2.5 inch and 3 inch. The bolt holes on the flanges are slotted, so they will fit up to a smaller exhaust without any problems. Right now, I have the stock catalytic convertor back on my car. I almost got caught with the test pipe on my car by the CHP, and it scared the hell out of me. On top of that, a test pipe didn't really help my powerband the way I wanted it to.

 

[Mattitude v1]

I need a 2.5" to bolt up to the N1. Will the Buschur bolt on no prob? The Buschur and Exile Racing cat look best. I don't want something universal like the Magnaflow and the Random Tech was $240. Thanks for the sites dudes.

 

[Thunderskull]

If the N1 will bolt up to the stock cat, then it should bolt up to the Buschur.

 

[Wilfus65gs]

This may be a stupid question but could u possibly use a gst cat??? I figure that it would flow better than ours and since u can use the catback part of a gst exhaust on a nt then y not the cat?

 

[green95hrcgs]

The Exileracing.com one is a complete bolt-on and you can get it in 2.5" and 3". They are actually CATCO cats that are made to bolt on. I researched and they are $100 even for the cat.

 

[9D9 MITSU RS]

go to a good muffler shop. They can weld 1 to your existing flanges.

 

[lawdaman]

I'm not sure about that Bochur company but I know tthe following companies make cats for under $100 for our applications:
-OBX R
-Arospeed
-Bomz
Adding 10-15HP is more likely at the crank and not the wheels. Depending on your other supporting mods expect between 4-8 whp gain at most (maybe). It's a solid mod but dont believe everything you read from aftermarket companies unless they show you a real dyno map before and after.

 

[Mattitude v1]

Prisewise, the Exile Racing looks the best. For $50 more is Buschur, which is stainless steel. I've heard there is a terrible noise difference after installing a high flow cat. Is this just an initial thing that will go away or does it relate to what exhaust is installed? I love my exhaust sound now and don't want any degradation (if that's a word) in sound.

 

[green95hrcgs]

The Exile cat will last a good while. I dont see the need to get a stainless one. Your car will be a bit louder. There is just no getting around that as far as I know.