Ok my GSR has the same 3k to 3500k rattle mentioned in many threads before. I have gotten some pebbles out of the heat sheild but still the same rattle. I took my car to the local Midas to have it looked at. They told me that my cat was going out and it was 300 to get it fixed does this sound right??

 

If you're getting the evo2 and your cat is going bad, you might as well get a high-flow one from SMSP. It'll be about the same price as what Midas is charging you.

 

does that effect emisions or anything.....but i was askin if that could be what is really wrong because i dont wanna get a new one if i dont have to

 

There was a thread about the header being the cause of some of those rattles @3500 rpms a while ago.

Also try removing the heatshields altogether.

 

thats not to complicated is it

 

i didn't know that there was a difference in cats. when i bought my 90 ls it had an egay 20 cat on it, i swapped for a catco high flow and noticed absolutely no difference. not saying that this is typical, but i don't think i'd waste 300 bucks on something i could spend 20 on and get the same results, kind of like the intake theory, $=power wrong.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jhammond_82 &raquo;</TD></TR><TR><TD CLASS="quote">i didn't know that there was a difference in cats. when i bought my 90 ls it had an egay 20 cat on it, i swapped for a catco high flow and noticed absolutely no difference. not saying that this is typical, but i don't think i'd waste 300 bucks on something i could spend 20 on and get the same results, kind of like the intake theory, $=power wrong. </TD></TR></TABLE>

That's because that $20 cat was a test pipe and not a catalytic converter. A test pipe is about the same performance as a high flow cat, but it makes your car sound and smell like ***.

 

no cat is the way to go more power

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tomithy &raquo;</TD></TR><TR><TD CLASS="quote">That's because that $20 cat was a test pipe and not a catalytic converter. A test pipe is about the same performance as a high flow cat, but it makes your car sound and smell like ***.</TD></TR></TABLE> fyi, it was a cat. in our state cars have to pass a visual and i passed with it. i know there is a difference, but go on superhonda.com and talk to some people they have dyno sheets with both, a test pipe, high flow cat, and stock cat, and they all performed the same within about 3 hp. also /thread

 

A visual inspection isn't exactly hard to pass. A high-flow cat shouldn't pass inspection. A tri-y header shouldn't pass a visual inspection.

For $20, I guarantee you it was not a real catalytic converter. At best it was a resonated test pipe. But if you're so sure, find me a new catalytic converter for anywhere close to $20 on ebay.

 

http://cgi.ebay.com/ebaymotors...ZWDVW heres one. if the sellers info is misinforming, its not my fault. its listed as a catalytic converter.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jhammond_82 &raquo;</TD></TR><TR><TD CLASS="quote">http://cgi.ebay.com/ebaymotors...ZWDVW heres one. if the sellers info is misinforming, its not my fault. its listed as a catalytic converter. </TD></TR></TABLE>

That is very much not a catalytic converter. It's also $50.
If the seller's info is misleading, you shouldn't pass it on as fact.