antony80 Posted September 13, 2007 Share Posted September 13, 2007 JUST TRYING TO GET A POLL HERE. HOW MANY GS OWNERS IN THIS FORUM HAD TO REPLACE CATALYTIC CONVERTER? DEALER WANTS $1500 TO REPLACE ONE CAT. IF I REPLACE BOTH IT WILL BE $3000 :cries: :cries: MY CATALYTIC CONVERTER WENT AT 86K.....I LOVE THIS CAR AND DON'T WANT TO GET RID OF IT.. SO JUST TRYING TO FINDOUT IF ANY OTHER COMMON MAJOR REPAIRS ANYONE EXPERIENCED HERE? THANKS GUYS Quote Link to comment Share on other sites More sharing options...
99blkgs Posted September 13, 2007 Share Posted September 13, 2007 JUST TRYING TO GET A POLL HERE. HOW MANY GS OWNERS IN THIS FORUM HAD TO REPLACE CATALYTIC CONVERTER?DEALER WANTS $1500 TO REPLACE ONE CAT. IF I REPLACE BOTH IT WILL BE $3000 :cries::cries: MY CATALYTIC CONVERTER WENT AT 86K.....I LOVE THIS CAR AND DON'T WANT TO GET RID OF IT.. SO JUST TRYING TO FINDOUT IF ANY OTHER COMMON MAJOR REPAIRS ANYONE EXPERIENCED HERE? THANKS GUYS my cat went on my 98 gs and i drove with it like that for 50k miles i dont understand what the problem is screw payin 3 grand Quote Link to comment Share on other sites More sharing options...
CarbonGS Posted September 13, 2007 Share Posted September 13, 2007 i just got headers and y-pipe. eliminated the cats completely and got performance. installed O2 simulators and no Check Engine Lights either. all for under $400. Quote Link to comment Share on other sites More sharing options...
99blkgs Posted September 14, 2007 Share Posted September 14, 2007 i just got headers and y-pipe. eliminated the cats completely and got performance. installed O2 simulators and no Check Engine Lights either. all for under $400. hey carbon where did u purchase these parts from and does ur car soung loud or annoying without the cats??? Quote Link to comment Share on other sites More sharing options...
russ306 Posted September 16, 2007 Share Posted September 16, 2007 I have 1999 Lexus GS300 and its been making a rattling noise so I went to a local muffler shop and the guy told that peices from my cat converter had broken off and were ratteling around in my pipes. He told me it's going to cost around $2000 to fix and that it will only get worse with time. Is there anyway around this. Please reply if there is. JUST TRYING TO GET A POLL HERE. HOW MANY GS OWNERS IN THIS FORUM HAD TO REPLACE CATALYTIC CONVERTER?DEALER WANTS $1500 TO REPLACE ONE CAT. IF I REPLACE BOTH IT WILL BE $3000 :cries::cries: MY CATALYTIC CONVERTER WENT AT 86K.....I LOVE THIS CAR AND DON'T WANT TO GET RID OF IT.. SO JUST TRYING TO FINDOUT IF ANY OTHER COMMON MAJOR REPAIRS ANYONE EXPERIENCED HERE? THANKS GUYS Quote Link to comment Share on other sites More sharing options...
BigB Posted October 3, 2007 Share Posted October 3, 2007 i just got headers and y-pipe. eliminated the cats completely and got performance. installed O2 simulators and no Check Engine Lights either. all for under $400. Hey what's up man! I also live in Atlanta! Looking to upgrade my exhaust, can you PLEASE tell me where did U go to get your work done at???? Thank you in advance for your time & help in this matter Sir! Also can email info to: theluvfoundation@yahoo.com Lexus4Life!!!!!! Quote Link to comment Share on other sites More sharing options...
mr_gs300 Posted October 18, 2007 Share Posted October 18, 2007 i just got headers and y-pipe. eliminated the cats completely and got performance. installed O2 simulators and no Check Engine Lights either. all for under $400. Hey whatsup just wondering if you could give me some details on that. i been tryingto do it for the longest Quote Link to comment Share on other sites More sharing options...
Lexizm Posted October 21, 2007 Share Posted October 21, 2007 Hey people, I had the same mod done on my GS3 when I had it. The GS3 cats are in the headers, so when you remove the headers you remove the cats. The headers I had were OBX; you can use most aftermarket IS300 headers (same motor) but when I comes to the down pipe, the GS's is longer than the IS one. I used SIMS (simulators) and I didn't have any check engine lights or anything. There are a few places in Atlanta that can do this kind of work. Just let me know what part of town you're in and I can give you some info on that. I have a GS430 now, and I think I need to get one of my cats replaced too (the 3rd one). Quote Link to comment Share on other sites More sharing options...
1quickgs Posted November 1, 2007 Share Posted November 1, 2007 Hey people, I had the same mod done on my GS3 when I had it. The GS3 cats are in the headers, so when you remove the headers you remove the cats. The headers I had were OBX; you can use most aftermarket IS300 headers (same motor) but when I comes to the down pipe, the GS's is longer than the IS one. I used SIMS (simulators) and I didn't have any check engine lights or anything. There are a few places in Atlanta that can do this kind of work. Just let me know what part of town you're in and I can give you some info on that. I have a GS430 now, and I think I need to get one of my cats replaced too (the 3rd one). when can we get the O2 simulator i have to for emission inspection next week thanks in Advance Quote Link to comment Share on other sites More sharing options...
punash007 Posted November 13, 2007 Share Posted November 13, 2007 Hey people, I had the same mod done on my GS3 when I had it. The GS3 cats are in the headers, so when you remove the headers you remove the cats. The headers I had were OBX; you can use most aftermarket IS300 headers (same motor) but when I comes to the down pipe, the GS's is longer than the IS one. I used SIMS (simulators) and I didn't have any check engine lights or anything. There are a few places in Atlanta that can do this kind of work. Just let me know what part of town you're in and I can give you some info on that. I have a GS430 now, and I think I need to get one of my cats replaced too (the 3rd one). I live in loganville and need to get my GS300 done could you please give me the address. Thanks in advance . Quote Link to comment Share on other sites More sharing options...
Gena Posted January 20, 2008 Share Posted January 20, 2008 Wont O2 simulators destroy gas mileage. Thats why the sensors are there, to adjust the gas air ratio. Once I did this on my maxima, my mpg went from 15-20 all the way to 9-10. Wont it be easier to find a junk yard with a low mile GS and buy the headers with the cats? Quote Link to comment Share on other sites More sharing options...
SRK Posted January 21, 2008 Share Posted January 21, 2008 The pre-cat O2 sensors remain in place, and they control air-fuel ratio. The post cat sensors monitor the condition of the cat, and if there isn't one, they'll pop a code. The sim produces a signal mimicking that of a properly functioning cat. Fuel mileage will be the same, no codes, but emissions will skyrocket. If like me, you believe anthropogenic global warming is a myth wrapped in bad science, then all is OK. If you believe that cars will kill us all by emissions, then removing the cats shouldn't be an option. Quote Link to comment Share on other sites More sharing options...
Dj Kream Posted April 16, 2009 Share Posted April 16, 2009 Hey people, I had the same mod done on my GS3 when I had it. The GS3 cats are in the headers, so when you remove the headers you remove the cats. The headers I had were OBX; you can use most aftermarket IS300 headers (same motor) but when I comes to the down pipe, the GS's is longer than the IS one. I used SIMS (simulators) and I didn't have any check engine lights or anything. There are a few places in Atlanta that can do this kind of work. Just let me know what part of town you're in and I can give you some info on that. I have a GS430 now, and I think I need to get one of my cats replaced too (the 3rd one). I live in loganville and need to get my GS300 done could you please give me the address. Thanks in advance . hey I live in Atlanta and want to get the same done Where did he send you? Quote Link to comment Share on other sites More sharing options...
drew028 Posted May 1, 2009 Share Posted May 1, 2009 Hey people, I had the same mod done on my GS3 when I had it. The GS3 cats are in the headers, so when you remove the headers you remove the cats. The headers I had were OBX; you can use most aftermarket IS300 headers (same motor) but when I comes to the down pipe, the GS's is longer than the IS one. I used SIMS (simulators) and I didn't have any check engine lights or anything. There are a few places in Atlanta that can do this kind of work. Just let me know what part of town you're in and I can give you some info on that. I have a GS430 now, and I think I need to get one of my cats replaced too (the 3rd one). I live in loganville and need to get my GS300 done could you please give me the address. Thanks in advance . hey I live in Atlanta and want to get the same done Where did he send you? Seafoam ur car.. made my check engine for the car go away Quote Link to comment Share on other sites More sharing options...
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