My stock cat is getting really rusty and am may be interested in replacing it. Im looking for HP gains plus Sound gains but don't want the bees in the can sound and would rather have no sound gains then a crap sound. I also don't want to put something on my car that will cause me to fail emissions in NJ. What do you guys recomend?

 

OEM to keep it quiet. A high flow cat will only add 1-3 HP and is supposedly very loud. Not too noticable gains. An aftermarket high flow like a magnaflow will not fail emissions.

 

Don't judge the catalytic converter by the outside rust... it's probably fine (functionally). Of course, if you want a high-flow one that's a different story altogether.

 

^ WORD , take it off if you can and have a look through it.

 

I got the CE cat on. I put it on when I finally had enough of busting those sh!tty studs off every time the cat was removed... Passed emissions and does not increase the sound level at all. Good deal for only $100.

 

Id actually like a nice loud sound aslong as it isnt the bees sound. I dont like that ricey sound only things is my cat aint comming off to easy to check it if i were to replace it i would have to do most of my exaust. The guy that owned the car be4 me put on new stuff from the cat to the tip looks real cheap with a real tiny tip but isnt stock. So i was thinking maybe Greddy sp2 cat back? Does that usually come with a cat or would i have to buy that seperatley and if it doesnt what are some good hi flows

*edit* and all the stuff he put on is welded together no bolts anywhere even the pipes going to the cat. Im also thinking due to my recent engine problems. (soon gonna be fixed with a 20k engine with a mevi on it =) excited) was burning a whole lot of oil with clouds and clouds of smoke. Which i dont think did much good internally to my exaust

 

You will get the sound you want with the proper cat back set up (y pipe as well to some extent) rather than the cat.

 

So it sounds like a decent y pipe a no sound cat and greddy cat back would be good setup?

 

is there any sound output difference between the CM resonated straight pipe compared to a high flow cat or stock?

 

yes... lots have the greddy cat back maybe some one could give you a sound clip.

 

a straight pipe WILL be louder than a high flow or stock cat.

 

Just curious, what is the benefit of the MEVI? Ive never heard of them untill on this site?

 

The mevi is an import intake manifold for our cars that has pretty decent high rpm HP gains which can be used even more with a tuned ECU that increases the rev limiter. Theres is tons of information in the stickys that can tell you everything you need to know.

*edit* and thanks for your help ill keep you guys informed once my car is running keeping my fingers crossed for today =)

 

Only thing keeping me from doing catback is the gains ... close to none. We only get 5-10 HP TOPS! Why should I annoy myself and everyone else on the street for 10 HP. It will only make the smallest difference in a street race anyway.

 

You can feel 10 horses, so it would make a difference. But top gain for a highflow cat is like 2 horses, not 10!

 

Because the stock b pipe and muffler is

 

lol so explain how our exaust setups are setup. So a y pipe is headers to cat? and then theres the cat and then a b pipe to the muffeler and tip? Do cat backs come with a cat? or do you have to also buy them

 

This is correct.

Cat backs do not come with the cat... only the b and muffler... hence the term cat back.

 

you are forgetting pre-cats on the y (which become ixnayed with a performance y pipe). IMO, Random Technologies makes a really good but expensive high flow. The reason you are hearing about the MEVI is that all of the previous owners of this product are switching to the 3.5 swap.

 

Well looks like thats what im gonna be doing after i get outa debt from the egine replacement. U think i should do drop or exaust first.

*and eventhough i would have been thrilled to do a 3.5 swap i didnt have the cash and am really happy im gettin an engine with a mevi =)

 

if you need to replace your cat, get a hi flow fomr warpspeed for $100. sound does not change, might slightly get louder, but barely noticable. but only get it if you stock is really bad, no point in getting one unless there is something wrong with your stock one.

 

do they really sound that bad? I am imagining its going to sound like johnny rice rocket and his "tricked out" 19xx honda Cxx whatever with a coffee can muffler.

dear god, please dont let my car sound like that . ..

 

top gains for a hi flow cat on an n/a car is not 2hp either, its more like .5. and they do not sound bad, they dont change the sound, it sounds just like stock. the only reason anyone should ever get a hi flow cat is if they are boosted, or their OEM cat is bad and they need a replacement and dont want/need to spend a fortune on another OEM one.

 

Only reason i would get a new cat is if i did full exaust because the idiot that had the car be4 me welded everything together even where the bolts connect to the cat so itd just cause more work then needed if i got a high flow that would just bolt right onto the cat back itd make a life alot happier =)

 

the pre-cats are part of the y pipe.

 

interesting, thanx, to late tho i already dropped the whopping 35 bucks for the "performance" cat on ebay. lol. got it and it doesnt even have a bung for the 02 sensor on it! fortunately Im not a complete nincompoop so instead of freaking out Im just going to weld a bung to it.

 

ebay.

 

get warpspeeds cat convertor for $100