4 cats to 2

recore · May 2nd, 2011, 09:27 PM

I'm going from the stock 4 cat h pipe set up to a magnaflow with just 2 cats. Does the stock 4 cat system have 4 02 sensors or only 2? Will I get any codes from this change? The car is a stock 89GT. And if anyone has the part number or link to a 4 cat magnaflow h pipe send it my way, I've only been able to find their 4 cat X pipe. Thanks.

ryanw · May 2nd, 2011, 09:53 PM

only 2 O2 sensors, and no codes should show up, they didnt with me any ways

recore · May 2nd, 2011, 10:29 PM

Good to know, thank you sir!

93hatch · May 2nd, 2011, 11:20 PM

o2s are before the cats derp

ryanw · May 2nd, 2011, 11:43 PM

Originally Posted by 93hatch

o2s are before the cats derp

you always have some sort of a smart ass answer dont you....lmao

ha ha

93hatch · May 2nd, 2011, 11:46 PM

jkeyz · May 3rd, 2011, 12:04 AM

no one likes a boring ass forum haha.. MM has a bunch of fuckin degenerates, i fit right in

jkeyz · May 3rd, 2011, 12:05 AM

no one likes a boring ass forum haha.. MM has a bunch of fuckin degenerates, i fit right in

93hatch · May 3rd, 2011, 12:13 AM

jkeyz · May 3rd, 2011, 12:22 AM

your on a .gif rampage tonight huh? lol

nolife · May 3rd, 2011, 12:30 AM

Originally Posted by recore

I'm going from the stock 4 cat h pipe set up to a magnaflow with just 2 cats. Does the stock 4 cat system have 4 02 sensors or only 2? Will I get any codes from this change? The car is a stock 89GT. And if anyone has the part number or link to a 4 cat magnaflow h pipe send it my way, I've only been able to find their 4 cat X pipe. Thanks.

You don;t need a 4 cat system. I don't think Magnaflow makes a catted H pipe any more. I don't see it at Summit, Jegs, or on the Magnaflow site. Only the X

recore · May 3rd, 2011, 12:45 AM

ok, since I am one, what is a derp? I've found the 2 cat h pipe no problem, but when I tried to buy it from Amazon they said they could not ship that to California. I'm going to order it elsewhere if I can find another vendor with free shipping, willing to sell it to me. If all else fails I'm going to have it shipped to my bro in Utah. Are you sure I don't need the 4 cat? I thought legally I did but I'm not positive but if you're right that would be sweet because I worry about the visual inspection, the 2 cat should pass the sniffer no problem I would think. I think you're right, they don't make the 4H anymore.

jkeyz · May 3rd, 2011, 12:50 AM

here in NY you dont need cats lol.. but did you try american muscle? they have free shipping. I think cjponyparts might have free shipping too, not sure though, i haven't bought from them in a while because their prices are high

93hatch · May 3rd, 2011, 12:52 AM

its a fuking bitch to get a fox to pass a sniffer with 2 cats, trust me, personal experience with 2 diff cars

ryanw · May 3rd, 2011, 12:52 AM

Thats what you may have to do....Ship it to your brother and have him ship it to you. California are dicks like that. California wants you to have all 4 cats and even if you bought just cats they have to be specific ones that are approved by California

93hatch · May 3rd, 2011, 12:55 AM

recore · May 3rd, 2011, 02:45 AM

Originally Posted by 93hatch

its a fuking bitch to get a fox to pass a sniffer with 2 cats, trust me, personal experience with 2 diff cars

The hell you say! True story? Now that's depressing so what was you're set up and what did you end up doing? If this is the case I may have to go with the 4 cat X. Are the stock 4 cats really as restrictive as I've heard or is that just rumor? And what's a derp?
signed,
The Derp

ryanw · May 3rd, 2011, 02:53 AM

save your stock h-pipe because you may have to swap back and forth just for smog.. I still have about 14 months before i have to smog my car and i have the bbk 2 cat x pipe. I'm not sure if ill even pass visual but we will see.

nolife · May 3rd, 2011, 11:01 AM

Unless it is approved for CA sale and certified 50 state, CA can fail it. I'm not in CA. I have the 2 cat model with a lot of additional stuff that car passes with far better emissions numbers than my completely stock mustang with 4 cats. If someone has a problem with the Magnaflow 2 cat model passing, either that specific h-pipe is bad or there are other problems.

fogged306 · May 3rd, 2011, 11:08 AM

Originally Posted by recore

The hell you say! True story? Now that's depressing so what was you're set up and what did you end up doing? If this is the case I may have to go with the 4 cat X. Are the stock 4 cats really as restrictive as I've heard or is that just rumor? And what's a derp?
signed,
The Derp

Rob Schneider is a derp.

May 2nd, 2011, 09:27 PM	#1
recore Regular 1989 Mustang GT Join Date: Nov 2010 Location: Redondo Beach, CA Posts: 249 iTrader: 0 reviews	4 cats to 2 I'm going from the stock 4 cat h pipe set up to a magnaflow with just 2 cats. Does the stock 4 cat system have 4 02 sensors or only 2? Will I get any codes from this change? The car is a stock 89GT. And if anyone has the part number or link to a 4 cat magnaflow h pipe send it my way, I've only been able to find their 4 cat X pipe. Thanks. __________________ Trying to be sensitive to the sensitivities of the sensitive regulars.

May 2nd, 2011, 09:53 PM	#2
ryanw I Post Entirely Way Too Much 1991 Ford Mustang GT Join Date: May 2007 Location: San Diego, California Posts: 6,063 iTrader: 0 reviews	only 2 O2 sensors, and no codes should show up, they didnt with me any ways __________________ DART 331ci stroker, AFR 185 heads, Trick Flow R intake, Accufab 70mm tb, 75mm pro m Maf, 30lb injectors, jba headers, 2 1/2" x pipe flowmaster super 10 mufflers, 255 fuel pump, 3:27 gears

May 2nd, 2011, 10:29 PM	#3
recore Regular 1989 Mustang GT Join Date: Nov 2010 Location: Redondo Beach, CA Posts: 249 iTrader: 0 reviews	Good to know, thank you sir! __________________ Trying to be sensitive to the sensitivities of the sensitive regulars.

May 2nd, 2011, 11:20 PM	#4
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	o2s are before the cats derp __________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

May 2nd, 2011, 11:46 PM	#6
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	__________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

May 3rd, 2011, 12:04 AM	#7
jkeyz Regular 93 5.0 lx Join Date: Mar 2010 Posts: 342 iTrader: 0 reviews	no one likes a boring ass forum haha.. MM has a bunch of fuckin degenerates, i fit right in

May 3rd, 2011, 12:05 AM	#8
jkeyz Regular 93 5.0 lx Join Date: Mar 2010 Posts: 342 iTrader: 0 reviews	no one likes a boring ass forum haha.. MM has a bunch of fuckin degenerates, i fit right in

May 3rd, 2011, 12:13 AM	#9
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	__________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

May 3rd, 2011, 12:22 AM	#10
jkeyz Regular 93 5.0 lx Join Date: Mar 2010 Posts: 342 iTrader: 0 reviews	your on a .gif rampage tonight huh? lol

May 3rd, 2011, 12:45 AM	#12
recore Regular 1989 Mustang GT Join Date: Nov 2010 Location: Redondo Beach, CA Posts: 249 iTrader: 0 reviews	ok, since I am one, what is a derp? I've found the 2 cat h pipe no problem, but when I tried to buy it from Amazon they said they could not ship that to California. I'm going to order it elsewhere if I can find another vendor with free shipping, willing to sell it to me. If all else fails I'm going to have it shipped to my bro in Utah. Are you sure I don't need the 4 cat? I thought legally I did but I'm not positive but if you're right that would be sweet because I worry about the visual inspection, the 2 cat should pass the sniffer no problem I would think. I think you're right, they don't make the 4H anymore. __________________ Trying to be sensitive to the sensitivities of the sensitive regulars.

May 3rd, 2011, 12:50 AM	#13
jkeyz Regular 93 5.0 lx Join Date: Mar 2010 Posts: 342 iTrader: 0 reviews	here in NY you dont need cats lol.. but did you try american muscle? they have free shipping. I think cjponyparts might have free shipping too, not sure though, i haven't bought from them in a while because their prices are high

May 3rd, 2011, 12:52 AM	#14
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	its a fuking bitch to get a fox to pass a sniffer with 2 cats, trust me, personal experience with 2 diff cars __________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

May 3rd, 2011, 12:55 AM	#16
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	__________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

May 3rd, 2011, 02:53 AM	#18
ryanw I Post Entirely Way Too Much 1991 Ford Mustang GT Join Date: May 2007 Location: San Diego, California Posts: 6,063 iTrader: 0 reviews	save your stock h-pipe because you may have to swap back and forth just for smog.. I still have about 14 months before i have to smog my car and i have the bbk 2 cat x pipe. I'm not sure if ill even pass visual but we will see. __________________ DART 331ci stroker, AFR 185 heads, Trick Flow R intake, Accufab 70mm tb, 75mm pro m Maf, 30lb injectors, jba headers, 2 1/2" x pipe flowmaster super 10 mufflers, 255 fuel pump, 3:27 gears

May 3rd, 2011, 11:01 AM	#19
nolife MM Fanatic 91GT, 88GT, 02GT Join Date: Dec 2006 Posts: 3,057 Blog Entries: 3 iTrader: 0 reviews	Unless it is approved for CA sale and certified 50 state, CA can fail it. I'm not in CA. I have the 2 cat model with a lot of additional stuff that car passes with far better emissions numbers than my completely stock mustang with 4 cats. If someone has a problem with the Magnaflow 2 cat model passing, either that specific h-pipe is bad or there are other problems. __________________ Last edited by nolife; May 3rd, 2011 at 11:37 AM.

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