To cat or not to cat, that is the question
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To cat or not to cat, that is the question so im about to pull the trigger on some LTs for TSP (1 3/4). I have a hooker cat-back super comp. w/ shorties.
My question is should i run a catted y or an O/R y from TSP?
I dont want the gas smell that comes into the car (some say they smell it when using an O/R y) and i dont want rasp, but do want the sound and performance of the O/R y.True duals are out the question. Thanks for you .02 guys
My question is should i run a catted y or an O/R y from TSP?
I dont want the gas smell that comes into the car (some say they smell it when using an O/R y) and i dont want rasp, but do want the sound and performance of the O/R y.True duals are out the question. Thanks for you .02 guys
I just installed a set of QTP 1 3/4" with a custom 3" y pipe (no cats) that was very well put together. It's feeding into a 3" cat back that I think was an SLP option from the factory. I changed out the muffler years ago for a flowmaster (not sure which model). Center mount exhaust.
Man, it's freakin loud. I didnt think it would change this much since my cat-back was the same. Now that I have gotten used to it a little, I'm liking it more and more however, I can't give the throttle more than about 10% before it sounds like a nascar. People complain a lot about rasp on here, I guess mine makes noise that could qualify as rasp, but it pretty much sounds like straight pipes always sounded to me.
As far as smell, yeah, I'm getting fumes in the car which are only noticeable when sitting in traffic. I think I have some significant leaks in my v-band clamps though which I'm hoping to fix shortly.
Bottom line, if you want to poke around without anybody hearing you all the time, beware of catless y-pipes. If it's not a daily driver and you want to sound like a beast...go for it.
P.s. My wife hates it.
Man, it's freakin loud. I didnt think it would change this much since my cat-back was the same. Now that I have gotten used to it a little, I'm liking it more and more however, I can't give the throttle more than about 10% before it sounds like a nascar. People complain a lot about rasp on here, I guess mine makes noise that could qualify as rasp, but it pretty much sounds like straight pipes always sounded to me.
As far as smell, yeah, I'm getting fumes in the car which are only noticeable when sitting in traffic. I think I have some significant leaks in my v-band clamps though which I'm hoping to fix shortly.
Bottom line, if you want to poke around without anybody hearing you all the time, beware of catless y-pipes. If it's not a daily driver and you want to sound like a beast...go for it.
P.s. My wife hates it.
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^ thanks man
it is a DD, about a 10 mins commute mostly highway time and some traffic because ppl dont know how to drive. The fumes is what im worried about. I know rasp is based on someones opinion. Some love it some like me hate it. Loudness im not worried about. There are harleys and jacked trucks that are WAY TOO loud around here in Louisville, Ky.
Anyone else care to put there .02 in on this?
it is a DD, about a 10 mins commute mostly highway time and some traffic because ppl dont know how to drive. The fumes is what im worried about. I know rasp is based on someones opinion. Some love it some like me hate it. Loudness im not worried about. There are harleys and jacked trucks that are WAY TOO loud around here in Louisville, Ky.
Anyone else care to put there .02 in on this?
A good set of cats won't hurt, I have headers, ory and a hooker cat back and I want to switch to a catted y eventually. I haven't tuned it yet and while it does run rich I don't get much of a gas smell inside. I don't notice much rasp since switching to the hooker either.
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why do you want to go to a catted y? thanks for the reply
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A cam is in my future(not the near future) but by then my z-cam will be a weekend/nice day driver.
so if gas wont be bad, how about rasp?
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I have a huge cam, and no cats. And the smell is horrible! your hair,clothes, etc. reak of exhaust. even walking by the car running in the drive way, you can smell it on you when you walk in the house. my wife absolutely hates my car, and refuses to ride in it since if done h/c etc. because her hair smells so bad after..... If you dont want fumes, cats are a must!
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I have a huge cam, and no cats. And the smell is horrible! your hair,clothes, etc. reak of exhaust. even walking by the car running in the drive way, you can smell it on you when you walk in the house. my wife absolutely hates my car, and refuses to ride in it since if done h/c etc. because her hair smells so bad after..... If you dont want fumes, cats are a must!
(thats what she said) so fumes shouldnt be an issue, so im told. As long as rasp is not there then an O/R y is the way im leaning. Also would i need a new tune?
thanks again guys
I ran pacesetters/ory/hooker catback for about 6 years and the car was a DD. Gas smell wasn't bad at all, overall sound volume was pretty nice at first but did wear on me after awhile. When you were out just having fun it was great, but more than I cared for while commuting to work, longer highway drives, etc.
Rasp was not terrible like it would be with a loudmouth catback, but was definitely there and got annoying. I hated the rasp and it made the car sound like *** around 2,000 - 2,500 RPM. If you are running an ORY, you WILL have rasp.
With all of that being said, last month I welded in some high flow bullet cats and a high flow merge and wish I would have done it 5 years ago. The car is just as loud at idle, has ZERO rasp, is much quieter inside the car while cruising and has a way more refined exhaust tone. It's also still plenty loud when you put the pedal down. Finally, I haven't noticed any loss in power.
Rasp was not terrible like it would be with a loudmouth catback, but was definitely there and got annoying. I hated the rasp and it made the car sound like *** around 2,000 - 2,500 RPM. If you are running an ORY, you WILL have rasp.
With all of that being said, last month I welded in some high flow bullet cats and a high flow merge and wish I would have done it 5 years ago. The car is just as loud at idle, has ZERO rasp, is much quieter inside the car while cruising and has a way more refined exhaust tone. It's also still plenty loud when you put the pedal down. Finally, I haven't noticed any loss in power.
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I ran pacesetters/ory/hooker catback for about 6 years and the car was a DD. Gas smell wasn't bad at all, overall sound volume was pretty nice at first but did wear on me after awhile. When you were out just having fun it was great, but more than I cared for while commuting to work, longer highway drives, etc.
Rasp was not terrible like it would be with a loudmouth catback, but was definitely there and got annoying. I hated the rasp and it made the car sound like *** around 2,000 - 2,500 RPM. If you are running an ORY, you WILL have rasp.
With all of that being said, last month I welded in some high flow bullet cats and a high flow merge and wish I would have done it 5 years ago. The car is just as loud at idle, has ZERO rasp, is much quieter inside the car while cruising and has a way more refined exhaust tone. It's also still plenty loud when you put the pedal down. Finally, I haven't noticed any loss in power.
Rasp was not terrible like it would be with a loudmouth catback, but was definitely there and got annoying. I hated the rasp and it made the car sound like *** around 2,000 - 2,500 RPM. If you are running an ORY, you WILL have rasp.
With all of that being said, last month I welded in some high flow bullet cats and a high flow merge and wish I would have done it 5 years ago. The car is just as loud at idle, has ZERO rasp, is much quieter inside the car while cruising and has a way more refined exhaust tone. It's also still plenty loud when you put the pedal down. Finally, I haven't noticed any loss in power.
thanks for the reply man. This is interesting. Like i stated before, i hate rasp. Rasp = CRAP (IMO). I do like TSP catted Y, just not the cost. My main concern is sound quality( you can hear me coming and going) and fumes. Im afraid a catted y will tone it down too much compared to a o/r y?
keep the opinions and personal experiences coming guys. thanks again
I'm thinking about getting a catted y. The fumes get pretty bad. If you start the car in your garage, your whole garage is going to stink like fumes. Sitting in traffic is no fun either. I also seem to get a lot of dirty looks from people passing me which I assume they got a good whiff of my fumes. Everytime I drive my car, all my clothes stink like gas.
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I'm thinking about getting a catted y. The fumes get pretty bad. If you start the car in your garage, your whole garage is going to stink like fumes. Sitting in traffic is no fun either. I also seem to get a lot of dirty looks from people passing me which I assume they got a good whiff of my fumes. Everytime I drive my car, all my clothes stink like gas.
. ok so it looks like a catted y.would i need a tune as well? anyone
BBK LTs, ORY into slp LM2 muffler....... Very minimal gas smell (only at start up and outside the car) and the rasp is nowhere near as bad as I thought it would be. I guess cause I have an LM2 (dumped before the rear) my exhaust is not too raspy. I love my sound.... Will get an audio clip up very soon.
I vote for no cats
Tune is really not necessary, but if you want to get the max out of the headers.... TUNE IT!!!
I vote for no cats
Tune is really not necessary, but if you want to get the max out of the headers.... TUNE IT!!!
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BBK LTs, ORY into slp LM2 muffler....... Very minimal gas smell (only at start up and outside the car) and the rasp is nowhere near as bad as I thought it would be. I guess cause I have an LM2 (dumped before the rear) my exhaust is not too raspy. I love my sound.... Will get an audio clip up very soon.
I vote for no cats
Tune is really not necessary, but if you want to get the max out of the headers.... TUNE IT!!!
I vote for no cats
Tune is really not necessary, but if you want to get the max out of the headers.... TUNE IT!!!
I figured LTs and ory and my hooker catback wouldnt have any rasp, but if the gases are bad then i will go with cats.
im scratching my head now on what to do at this point, need more opinions/experiences please.
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I had a ory on my car with a 224/224 cam and my wife complained that i stink like gas every time i drove it. Welded a pair of $60 magnaflow cats in there and no more gas smell and all the rasp went away too. Did make the exhaust much quieter so I ended up putting a cutout on it. Now its perfect.
Last edited by speedgoat; May 18, 2012 at 01:24 PM.
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I had a ory on my car with a 224/224 cam and my wife complained that i stink like gas every time i drove it. Welded a pair of $60 magnaflow cats in there and no more gas smell and all the rask went away too. Did make the exhaust much quieter so I ended up putting a cutout on it. Now its perfect.
so im leaning towards the catted y, but can be persuaded the other way.
it almost seems like a damned if you do and damned if you dont.
Would i need new header bolts as well?
thanks again guys.
You stated your main concerns were sound quality (no rasp), and no fuel smell. Yes it costs more up front, but you need cats to hit those objectives. You can always add a cutout or change out the Hooker muffler at a later date if things are too quiet. There is no perfect setup, which is why you see guys messing with their exhaust so much.
I wouldn't bother getting the car tuned after LT's unless you notice it's not running right. You can also reuse your stock manifold bolts.
I wouldn't bother getting the car tuned after LT's unless you notice it's not running right. You can also reuse your stock manifold bolts.
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You stated your main concerns were sound quality (no rasp), and no fuel smell. Yes it costs more up front, but you need cats to hit those objectives. You can always add a cutout or change out the Hooker muffler at a later date if things are too quiet. There is no perfect setup, which is why you see guys messing with their exhaust so much.
I wouldn't bother getting the car tuned after LT's unless you notice it's not running right. You can also reuse your stock manifold bolts.
I wouldn't bother getting the car tuned after LT's unless you notice it's not running right. You can also reuse your stock manifold bolts.
screw the tune for now unless it falls on its face, and reuse header bolts.
if anyone wants to put any clips or give their input still, feel free. Wont buy for about another week.
IMO, just get the 1-7/8" TSP LT headers and the ORY-pipe, then if the smell bothers you too much, then just put a Magnaflow(#59959 3" in/out about $100) HF cat on the end of the Y-pipe. You also could go with a Magnaflow#59930(3.5" in/out about $120) for higher flow,with minimal modification to the exit of the TSP Y-pipe.
It'll still get hot enough to reduce any fuel smell, but you won't have to worry about it reducing you ground clearance or getting damaged. It's just an option I thought you should be aware of. The only down side I see it that it won't be as efficient as having HF cats right after the headers.
It'll still get hot enough to reduce any fuel smell, but you won't have to worry about it reducing you ground clearance or getting damaged. It's just an option I thought you should be aware of. The only down side I see it that it won't be as efficient as having HF cats right after the headers.
Last edited by 99Bluz28; May 16, 2012 at 04:25 PM.