Y pipe shipped and almost here...
I'm sure Brian will take care of us. I'm just hoping I don't have to send this y-pipe back to him....a swap would be a lot easier since we'd only have to reinstall this once more.
If we have to send it back first we're looking at two additonal installs.
If we have to send it back first we're looking at two additonal installs.
ya that would be expensive and not fun ...
ya shes telling you a lie :P
wowzers...Just got it installed and here's my input:
I definitely have the noise as well. I put it in neutral and revved it to 3,500, then let off and I heard the noise. The noise sounds in between squeaking brakes and a belt going bad...
When in tiptronic, you hear it more often if you down-shift to "engine brake," but if you are in auto, then you seldom hear it, AND if you have the windows rolled up, music playing and don't have your head towards the window, you won't hear it.
Power wise I haven't gotten the chance to test it out that well yet, but I sure hope that it's noticeable, so that it will off-set the annoying sound that comes about once in a while
I definitely have the noise as well. I put it in neutral and revved it to 3,500, then let off and I heard the noise. The noise sounds in between squeaking brakes and a belt going bad...
When in tiptronic, you hear it more often if you down-shift to "engine brake," but if you are in auto, then you seldom hear it, AND if you have the windows rolled up, music playing and don't have your head towards the window, you won't hear it.
Power wise I haven't gotten the chance to test it out that well yet, but I sure hope that it's noticeable, so that it will off-set the annoying sound that comes about once in a while
I emailed Brian last night and told him there was a sound clip posted on this thread. He said he was going to check it out this morning. So we'll see....
Last edited by JG1; Sep 28, 2007 at 06:55 PM.
Am I the only one that gets a bit of a whooshing sound when accerelating hard from a low rpm. The sound is around 2-3k rpm. It's like I can hear the air blowing threw that pipe.
I really don't mind it though...sounds pretty cool. It's the other sound thats dreadful...lol
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Joined: Oct 2005
Posts: 619
How much is this thing? And will I notice any gains if I used this with the stock mufflers? (not that I am going to, I will probably get magnaflows)
I am using my Y-Pipe with stock mufflers. Its $350 + shipping ($20 or so). No noticeable noise increase either. It definitely has more power....
Hey everybody,
sorry for leaving this hanging, I was away some of the weekend, and then it seems like whenever I sit down to do some forum correspondence, the org is down. Just a coincidence, I suppose, but that's happened to me 2 or 3 times over the last few days.
We're fabricating a "fresh" y-pipe with a pair of 6" lined flexes. I'll be very surprised if that doesn't make a difference, but obviously we want to confirm the solution before making additional arrangements for replacement.
Since some of you either can't hear the sound, or aren't bothered by it, I'll point out that there's nothing "wrong" with the flexes or the y-pipe (apart from the noise). This is simply the exhaust stream creating a sound as it passes through the unlined interior of the flexes. Doesn't affect performance, reliability, or lifespan - its 100% aesthetic, 0% functional.
But let's assume that lined flexes eliminate the sound heard around 3k rpms. For those considering the part, all future production will of course include lined flexes, so this issue only involves the first batch. [I've got a few on hand with the unlined flex that we'll sell for $289 or retrofit with the new flexes.]
If the new flex eliminates the whoosh, we will of course offer to replace the unlined flexes on the y-pipes that are out there now if the owners are bothered by the sound. We'll get into the specifics when the time comes (first thing next week if we can confirm the solution) but this will require returning the y-pipes for service.
We are committed to a 24-hour turnaround on the work and will immediately ship it back. The only out-of-pocket expense for the customer is return shipping (sending the y-pipe back to CA), and we will offset that with a $25 Cattman credit. We pay shipping back to the customer.
There has been discussion about sending out new "lined-flex" y-pipes as replacements for used "unlined flex" y-pipes. I agree that would be more convenient, but we simply can't do it that way. The solution we're offering will cost over $100/unit, we cannot also swap a new pipe for a used one. I'll also say that this work can only be done properly at our fabrication facility, putting these in locally is generally a bad idea; we can't cover the expense and the results will almost certainly be inferior.
Anyway, I expect to see a y-pipe with lined flexes either Wednesday or Thursday (this week) and we will get it on a car ASAP to check out the sound.
Bottom line - I'm very sorry this has occurred, and apologize for the inconvenience. The change in flex length seemed to be a minor revision to the prototype, I sure didn't anticipate that it would have this effect. As I mentioned in an earlier post, I've always been under the impression that flex noise was related to turbulance just below the 2-1 collector (that's where the flex is in earlier maxima y-pipes), but this has proven that theory wrong.
Brian C Catts
Cattman Performance
sorry for leaving this hanging, I was away some of the weekend, and then it seems like whenever I sit down to do some forum correspondence, the org is down. Just a coincidence, I suppose, but that's happened to me 2 or 3 times over the last few days.
We're fabricating a "fresh" y-pipe with a pair of 6" lined flexes. I'll be very surprised if that doesn't make a difference, but obviously we want to confirm the solution before making additional arrangements for replacement.
Since some of you either can't hear the sound, or aren't bothered by it, I'll point out that there's nothing "wrong" with the flexes or the y-pipe (apart from the noise). This is simply the exhaust stream creating a sound as it passes through the unlined interior of the flexes. Doesn't affect performance, reliability, or lifespan - its 100% aesthetic, 0% functional.
But let's assume that lined flexes eliminate the sound heard around 3k rpms. For those considering the part, all future production will of course include lined flexes, so this issue only involves the first batch. [I've got a few on hand with the unlined flex that we'll sell for $289 or retrofit with the new flexes.]
If the new flex eliminates the whoosh, we will of course offer to replace the unlined flexes on the y-pipes that are out there now if the owners are bothered by the sound. We'll get into the specifics when the time comes (first thing next week if we can confirm the solution) but this will require returning the y-pipes for service.
We are committed to a 24-hour turnaround on the work and will immediately ship it back. The only out-of-pocket expense for the customer is return shipping (sending the y-pipe back to CA), and we will offset that with a $25 Cattman credit. We pay shipping back to the customer.
There has been discussion about sending out new "lined-flex" y-pipes as replacements for used "unlined flex" y-pipes. I agree that would be more convenient, but we simply can't do it that way. The solution we're offering will cost over $100/unit, we cannot also swap a new pipe for a used one. I'll also say that this work can only be done properly at our fabrication facility, putting these in locally is generally a bad idea; we can't cover the expense and the results will almost certainly be inferior.
Anyway, I expect to see a y-pipe with lined flexes either Wednesday or Thursday (this week) and we will get it on a car ASAP to check out the sound.
Bottom line - I'm very sorry this has occurred, and apologize for the inconvenience. The change in flex length seemed to be a minor revision to the prototype, I sure didn't anticipate that it would have this effect. As I mentioned in an earlier post, I've always been under the impression that flex noise was related to turbulance just below the 2-1 collector (that's where the flex is in earlier maxima y-pipes), but this has proven that theory wrong.
Brian C Catts
Cattman Performance
Last edited by Cattman; Oct 1, 2007 at 11:20 AM.
thanks for the update... Its starting to bother me a little more now... i think i will send mine back when u offer that and get it fixed ...
so we pay for shipping there and back, but get a 25 dollar credit???
so we pay for shipping there and back, but get a 25 dollar credit???
NO, you only pay for shipping to our fabricating facility in SoCal (and you get a $25 credit for that). WE will pay for the return shipping (ground).
Brian
ahhhhh ok... thats a great deal brian...
just curious... can i drive down there and have it done that day? im so close i would hate to ship and wait a day or two..
just curious... can i drive down there and have it done that day? im so close i would hate to ship and wait a day or two..
Last edited by Fastmax05; Oct 1, 2007 at 11:19 AM.
Fastmax you're so needy! LOL j/k. Hey Brian thanks for keeping us up to date in the thread. Keep us posted and I'll reach out to ya once you're ready to take these back for the retrofit.
Those of you with the issue. Did you make sure all your bolts were tight? Do you have a stock or aftermarket exhaust?
I went back and tightened my bolts a bunch more. I haven't heard it for a while, but maybe I'm not listening closely. I'll have to try it again sometime.
I went back and tightened my bolts a bunch more. I haven't heard it for a while, but maybe I'm not listening closely. I'll have to try it again sometime.
Whether you hear a noise or not, its ALWAYS a good idea to go back and retighten all fasteners a couple days after installing exhaust parts. And, with this part it's SO easy, there's no excuse not to. [Much harder when installing headers, but just as necessary.]
Brian
Brian
FYI. Those of you who are afraid of doing it. I got sick of driving it up on ramps trying to get my rusted bolts off, o2 sensor issues, etc. So I just jacked up the drivers side of my car and slid under it. I was able to install it no problem laying on my garage floor with 1 wheel in the air.
FYI. Those of you who are afraid of doing it. I got sick of driving it up on ramps trying to get my rusted bolts off, o2 sensor issues, etc. So I just jacked up the drivers side of my car and slid under it. I was able to install it no problem laying on my garage floor with 1 wheel in the air.
next up for you is a i.m. spacer kit...
if u want... ill help you install yours... since we are close... just pay for my gas
maybe lunch :P You have a cai already right?
FYI. Those of you who are afraid of doing it. I got sick of driving it up on ramps trying to get my rusted bolts off, o2 sensor issues, etc. So I just jacked up the drivers side of my car and slid under it. I was able to install it no problem laying on my garage floor with 1 wheel in the air.
Senior Member
Joined: Oct 2005
Posts: 619
FYI. Those of you who are afraid of doing it. I got sick of driving it up on ramps trying to get my rusted bolts off, o2 sensor issues, etc. So I just jacked up the drivers side of my car and slid under it. I was able to install it no problem laying on my garage floor with 1 wheel in the air.
Sometimes what I do is put the 2 ton floor jack on and then put the jack from the trunk on it right next to the 2 ton. The trunk jack isn't supporting the car...but tight enough that if the 2 ton gave out it'd catch the car and save my life. I like having backups
