All You Need to Know About Downpipes
#101
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If you want only 1 O2 bung for only the stock O2 sensor then yes. If you plan on ever possibly adding a wideband down the line, then spending the extra $10 on the extra bung and $5 for a cap is well worth it..
oh, and keep your stock downpipe just in case you ever need it for something.
oh, and keep your stock downpipe just in case you ever need it for something.
#104
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If you want only 1 O2 bung for only the stock O2 sensor then yes. If you plan on ever possibly adding a wideband down the line, then spending the extra $10 on the extra bung and $5 for a cap is well worth it..
oh, and keep your stock downpipe just in case you ever need it for something.
oh, and keep your stock downpipe just in case you ever need it for something.
Ok got it, Thanks man!
#106
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Thank you guys for listing our downpipes and link to the MP downpipe section.
We've posted several videos of the MPx downpipe along with the MPx exhaust for the Turbo Cobalt.
Heres one :
http://www.youtube.com/watch?v=K1RxVMBljik
Thanks for the link, I added it to the first post.
Just FYI Cold Start up is not a very good representation of what the catless downpipe sounds like as when the car first turns on it goes into Cat Warm Up Mode which is loud as hell for 30-60sec and then the sounds calms down alot.
It would be great to have a vid of a car with a catted DP
Just FYI Cold Start up is not a very good representation of what the catless downpipe sounds like as when the car first turns on it goes into Cat Warm Up Mode which is loud as hell for 30-60sec and then the sounds calms down alot.
It would be great to have a vid of a car with a catted DP
Heres one :
http://www.youtube.com/watch?v=K1RxVMBljik
#107
I have access to a custom shop that does excellent work and can pretty much make me a downpipe in an hour or so. I will simply cut from the flexpipe down and do a 2.75 or 3'' pipe. I will be removing both cats and doing a small extension for the O2 bung. Do you think it will trip a cel?
I am not currently tuned. I am simply "preparing" my car for the tune.
I am not currently tuned. I am simply "preparing" my car for the tune.
#108
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if you read the thread, any catless dp "can" throw a cel. There are ways to try to get around that, by pulling the o2 about an inch back from the tube, using material stuffed in the bung in front of the sensor and maybe another way. If you are going to get an aftermarket tune you can disable that though. So catless would be fine. I am staying gm stage 1 and dont want to worry about cel's so I think I'll get a high flow cat.
Oh and you'll want a 3", dont go any smaller.
Oh and you'll want a 3", dont go any smaller.
#112
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I am planning on ordering a downpipe and I am wondering if I need the secondary bung? My car is a 2010 and has the rpd so I am guessing I need one? Correct me if I am wrong before I spend the extra coin.
#113
Negative. The only reason you would need the second o2 bung is if you plan on running an aftermarket wideband gauge. I highly recommend the ZZP Spun Metal Catted Downpipe!
#114
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I showed my dealer the lit for the MPx catback, and catless headpipe - they said they were fine with the catback, but more or less defaulted to pointing out MPx's own disclaimer about the possible SEL codes that could be set off because of the pipe having no cats...
The dealer was insistent that the lack of cats on the headpipe I chose was going to need a custom tune to work with it...
I call BS ~ if there is a sensor downwind, I am sure a resistor can be substituted to fool the ECM... More or less they wanted me to go with a cat'ed headpipe.
I am thinking that since I would be installing this myself only after I start taking over regular service, that I can always swap headpipes if I am going to bring it to the dealer for anything...
I am also currently looking for a Tech2, so that I can erase any possible error codes...
I am also going to buy a OEM service manual, so that I can see how anyhting is wired up;
I wanted the catless downpipe because I have read that it works best with the GMS1 in eliminating the power dropoff at the high end.
Q: Does anyone know if there is a significant difference when running an aftermarket 'catback', between the aftermarket catted headpipe, versus the catless headpipe?
I am planning on buying MPx's product because of seeing their product firsthand, and their great rep.
The dealer was insistent that the lack of cats on the headpipe I chose was going to need a custom tune to work with it...
I call BS ~ if there is a sensor downwind, I am sure a resistor can be substituted to fool the ECM... More or less they wanted me to go with a cat'ed headpipe.
I am thinking that since I would be installing this myself only after I start taking over regular service, that I can always swap headpipes if I am going to bring it to the dealer for anything...
I am also currently looking for a Tech2, so that I can erase any possible error codes...
I am also going to buy a OEM service manual, so that I can see how anyhting is wired up;
I wanted the catless downpipe because I have read that it works best with the GMS1 in eliminating the power dropoff at the high end.
Q: Does anyone know if there is a significant difference when running an aftermarket 'catback', between the aftermarket catted headpipe, versus the catless headpipe?
I am planning on buying MPx's product because of seeing their product firsthand, and their great rep.
#115
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I showed my dealer the lit for the MPx catback, and catless headpipe - they said they were fine with the catback, but more or less defaulted to pointing out MPx's own disclaimer about the possible SEL codes that could be set off because of the pipe having no cats...
The dealer was insistent that the lack of cats on the headpipe I chose was going to need a custom tune to work with it...
I call BS ~ if there is a sensor downwind, I am sure a resistor can be substituted to fool the ECM... More or less they wanted me to go with a cat'ed headpipe.
I am thinking that since I would be installing this myself only after I start taking over regular service, that I can always swap headpipes if I am going to bring it to the dealer for anything...
I am also currently looking for a Tech2, so that I can erase any possible error codes...
I am also going to buy a OEM service manual, so that I can see how anyhting is wired up;
I wanted the catless downpipe because I have read that it works best with the GMS1 in eliminating the power dropoff at the high end.
Q: Does anyone know if there is a significant difference when running an aftermarket 'catback', between the aftermarket catted headpipe, versus the catless headpipe?
I am planning on buying MPx's product because of seeing their product firsthand, and their great rep.
The dealer was insistent that the lack of cats on the headpipe I chose was going to need a custom tune to work with it...
I call BS ~ if there is a sensor downwind, I am sure a resistor can be substituted to fool the ECM... More or less they wanted me to go with a cat'ed headpipe.
I am thinking that since I would be installing this myself only after I start taking over regular service, that I can always swap headpipes if I am going to bring it to the dealer for anything...
I am also currently looking for a Tech2, so that I can erase any possible error codes...
I am also going to buy a OEM service manual, so that I can see how anyhting is wired up;
I wanted the catless downpipe because I have read that it works best with the GMS1 in eliminating the power dropoff at the high end.
Q: Does anyone know if there is a significant difference when running an aftermarket 'catback', between the aftermarket catted headpipe, versus the catless headpipe?
I am planning on buying MPx's product because of seeing their product firsthand, and their great rep.
PS: Which part of Calgary are you in, and what color is your TC I've only seen a couple other TC's in Calgary lol?
#116
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cat back stock vs 3" aftermarket is so marginal you probably wouldnt even notice; it could dyno like 1hp but that could be that dyno's margin of error. its honestly for sound.
ANY catless downpipe CAN throw a CEL, that is not bs. If you have a aftermarket tune you can fix it from getting cel's like tom.g said. I am going to stay gmstage 1 so I am just going to spring for a high flow cat downpipe and not worry about the cel's. I dont have time and patience to deal with that ****.
ANY catless downpipe CAN throw a CEL, that is not bs. If you have a aftermarket tune you can fix it from getting cel's like tom.g said. I am going to stay gmstage 1 so I am just going to spring for a high flow cat downpipe and not worry about the cel's. I dont have time and patience to deal with that ****.
#117
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Coupe, full load; Yellow, high rise, RPD, LSD, sunroof.
I live in the south, riverbend to be exact - I DD the car, so I can be all over town...
In the last couple weeks I have been getting the crash course on spotting & identifying different year/models of C-SS's - last week saturday a black 08-09 parked beside me in the Southcenter parking lot ~ I knew it was an 08-09 because of the two tone ebony/red seats... had pretty heavy tinted glass too.
I am seeing the odd one around town, I know that Jack Carter sold 2*, but haven't seen too many around town.
iirc the first one JC got was a yellow coupe that arrived in December 08(?) - and they had it till late '09. They also got a black 09 a couple months later... but the sales staff their were kinda douche-bags to me, so I walked - even though I would have probably paid a couple grand more than I ended up paying on this one from Shaganappi.
Amazingly Shaganappi still has a yellow '09; low rise, sunroof, analog boost gague. LSD - someone can get that one for a smoking deal, but they just raised the asking price by about a grand over the price I was given last month because they're having some sale, that attaches a $1000 gas card with the car...
Yup, there aren't many of us - when I met up with some of the locals, I was told that mine was the first TC car they saw, and first with the RPD they saw.
If one of the TC's you saw around town was a white one, strike it off your list of known cars around here because it's dead.
I have the Stage1 already but will be installing it, and the (yet to be ordered) exhaust only after the first "scheduled" oil change... presuming I have restraint
I live in the south, riverbend to be exact - I DD the car, so I can be all over town...
In the last couple weeks I have been getting the crash course on spotting & identifying different year/models of C-SS's - last week saturday a black 08-09 parked beside me in the Southcenter parking lot ~ I knew it was an 08-09 because of the two tone ebony/red seats... had pretty heavy tinted glass too.
I am seeing the odd one around town, I know that Jack Carter sold 2*, but haven't seen too many around town.
iirc the first one JC got was a yellow coupe that arrived in December 08(?) - and they had it till late '09. They also got a black 09 a couple months later... but the sales staff their were kinda douche-bags to me, so I walked - even though I would have probably paid a couple grand more than I ended up paying on this one from Shaganappi.
Amazingly Shaganappi still has a yellow '09; low rise, sunroof, analog boost gague. LSD - someone can get that one for a smoking deal, but they just raised the asking price by about a grand over the price I was given last month because they're having some sale, that attaches a $1000 gas card with the car...
Yup, there aren't many of us - when I met up with some of the locals, I was told that mine was the first TC car they saw, and first with the RPD they saw.
If one of the TC's you saw around town was a white one, strike it off your list of known cars around here because it's dead.
I have the Stage1 already but will be installing it, and the (yet to be ordered) exhaust only after the first "scheduled" oil change... presuming I have restraint
#118
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cat back stock vs 3" aftermarket is so marginal you probably wouldnt even notice; it could dyno like 1hp but that could be that dyno's margin of error. its honestly for sound.
ANY catless downpipe CAN throw a CEL, that is not bs. If you have a aftermarket tune you can fix it from getting cel's like tom.g said.
ANY catless downpipe CAN throw a CEL, that is not bs. If you have a aftermarket tune you can fix it from getting cel's like tom.g said.
Coupe, full load; Yellow, high rise, RPD, LSD, sunroof.
I live in the south, riverbend to be exact - I DD the car, so I can be all over town...
In the last couple weeks I have been getting the crash course on spotting & identifying different year/models of C-SS's - last week saturday a black 08-09 parked beside me in the Southcenter parking lot ~ I knew it was an 08-09 because of the two tone ebony/red seats... had pretty heavy tinted glass too.
I am seeing the odd one around town, I know that Jack Carter sold 2*, but haven't seen too many around town.
iirc the first one JC got was a yellow coupe that arrived in December 08(?) - and they had it till late '09. They also got a black 09 a couple months later... but the sales staff their were kinda douche-bags to me, so I walked - even though I would have probably paid a couple grand more than I ended up paying on this one from Shaganappi.
Amazingly Shaganappi still has a yellow '09; low rise, sunroof, analog boost gague. LSD - someone can get that one for a smoking deal, but they just raised the asking price by about a grand over the price I was given last month because they're having some sale, that attaches a $1000 gas card with the car...
Yup, there aren't many of us - when I met up with some of the locals, I was told that mine was the first TC car they saw, and first with the RPD they saw.
If one of the TC's you saw around town was a white one, strike it off your list of known cars around here because it's dead.
I have the Stage1 already but will be installing it, and the (yet to be ordered) exhaust only after the first "scheduled" oil change... presuming I have restraint
I live in the south, riverbend to be exact - I DD the car, so I can be all over town...
In the last couple weeks I have been getting the crash course on spotting & identifying different year/models of C-SS's - last week saturday a black 08-09 parked beside me in the Southcenter parking lot ~ I knew it was an 08-09 because of the two tone ebony/red seats... had pretty heavy tinted glass too.
I am seeing the odd one around town, I know that Jack Carter sold 2*, but haven't seen too many around town.
iirc the first one JC got was a yellow coupe that arrived in December 08(?) - and they had it till late '09. They also got a black 09 a couple months later... but the sales staff their were kinda douche-bags to me, so I walked - even though I would have probably paid a couple grand more than I ended up paying on this one from Shaganappi.
Amazingly Shaganappi still has a yellow '09; low rise, sunroof, analog boost gague. LSD - someone can get that one for a smoking deal, but they just raised the asking price by about a grand over the price I was given last month because they're having some sale, that attaches a $1000 gas card with the car...
Yup, there aren't many of us - when I met up with some of the locals, I was told that mine was the first TC car they saw, and first with the RPD they saw.
If one of the TC's you saw around town was a white one, strike it off your list of known cars around here because it's dead.
I have the Stage1 already but will be installing it, and the (yet to be ordered) exhaust only after the first "scheduled" oil change... presuming I have restraint
#119
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Any of the available downpipes have an "EPA" stamp on them? Or you guys know what brand of cats they use so I can go check for this? Need to stay STX legal and would hate to be busted for something so stupid.
And just for reference, here's the EPA labeling requirements that should be stamped right on the cat:
Required labels on the converters will have a series of letters and numbers and be in the following format:
N/XX/YYYY/ZZZZ for new ones
U/XX/YYYY/ZZZZ for used
where N - indicates a new converter
U - indicates a used converter
XX - is the manufacturer's code issued by EPA
YYYY - is usually a numerical designation of the vehicle application or part number
ZZZZ - is the month and year of manufacture (i.e., "0187" for January 1987)
Anyone seen this on there aftermarket catted DP?
And just for reference, here's the EPA labeling requirements that should be stamped right on the cat:
Required labels on the converters will have a series of letters and numbers and be in the following format:
N/XX/YYYY/ZZZZ for new ones
U/XX/YYYY/ZZZZ for used
where N - indicates a new converter
U - indicates a used converter
XX - is the manufacturer's code issued by EPA
YYYY - is usually a numerical designation of the vehicle application or part number
ZZZZ - is the month and year of manufacture (i.e., "0187" for January 1987)
Anyone seen this on there aftermarket catted DP?
Last edited by jboogie; 04-03-2010 at 09:58 PM.
#121
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"MagnaFlow fabricates each converter body from a single CNC-formed and laser-welded tubular section, which is then spun into a 4" round converter body shape. Each converter is literally manufactured around the ceramic catalyst, which is securely tucked inside, and necks down to thicker gauge material at the inlet/outlet for maximum durability." <--- what they said.
Kinda weird. You would think that if a ceramic catalyst would work just as well all cats would be using that insted of titanium?
Kinda weird. You would think that if a ceramic catalyst would work just as well all cats would be using that insted of titanium?
#122
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On the ZZP webpage, I have an option between 2.5 or 3" downpipe. Which one do I need if I have the stock exhaust system?
http://www.zzperformance.com/cobalt_...=540&catid=155
http://www.zzperformance.com/cobalt_...=540&catid=155
#124
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On the ZZP webpage, I have an option between 2.5 or 3" downpipe. Which one do I need if I have the stock exhaust system?
http://www.zzperformance.com/cobalt_...=540&catid=155
http://www.zzperformance.com/cobalt_...=540&catid=155
You need this one:
http://www.zzperformance.com/cobalt_...1016&catid=187