shelbypt Posted December 24, 2012 Report Share Posted December 24, 2012 This past summer, my car was used to build a prototype shorty header from ARH. The shorty's are made of stainless steel. The headers were designed to bolt up to the stock exhaust, I have a 2008 GT500KR. Shortly after they were done, I got a P0430 code, which is the second bank Cat is inefficient. With only 7k on the engine, I have a hard time believing that the Cat is bad. I switched the 02 sensor from the right side to the left and after driving it for about 15 miles, the same code came up, so it's not a 02 sensor problem. Could it be a timing issue on how quick the 02 sensor is heating up? Any ideas? Quote Link to comment Share on other sites More sharing options...
2010KonaBlueGT Posted December 24, 2012 Report Share Posted December 24, 2012 This past summer, my car was used to build a prototype shorty header from ARH. The shorty's are made of stainless steel. The headers were designed to bolt up to the stock exhaust, I have a 2008 GT500KR. Shortly after they were done, I got a P0430 code, which is the second bank Cat is inefficient. With only 7k on the engine, I have a hard time believing that the Cat is bad. I switched the 02 sensor from the right side to the left and after driving it for about 15 miles, the same code came up, so it's not a 02 sensor problem. Could it be a timing issue on how quick the 02 sensor is heating up? Any ideas? The O2 sensors have built-in heaters so they come on-line ASAP. My best guess is that you have a exhaust leak upstream (at the manifold flange) letting air (O2) into the exh. stream. Did you change your post-Cat sensors or just your pre-Cat sensors? If just the pre-Cat, try switching the post-Cat sensors to see if the problem chases the sensor or still remains on the same bank. Phill Quote Link to comment Share on other sites More sharing options...
Tob Posted December 24, 2012 Report Share Posted December 24, 2012 Got any photos of the headers? Does ARH intend to bring these to the market? Quote Link to comment Share on other sites More sharing options...
shelbypt Posted December 24, 2012 Author Report Share Posted December 24, 2012 The O2 sensors have built-in heaters so they come on-line ASAP. My best guess is that you have a exhaust leak upstream (at the manifold flange) letting air (O2) into the exh. stream. Did you change your post-Cat sensors or just your pre-Cat sensors? If just the pre-Cat, try switching the post-Cat sensors to see if the problem chases the sensor or still remains on the same bank. Phill The sensors that I switched out were the sensors that are in the cats. I believe these are the post cat sensors or secondary. I thought about the exhaust leak, but I don't hear a leak. Is it possible to still have a leak that is undetectable to the ear but cause the code? Quote Link to comment Share on other sites More sharing options...
shelbypt Posted December 24, 2012 Author Report Share Posted December 24, 2012 Got any photos of the headers? Does ARH intend to bring these to the market? Tob, I do have some pics, but I'm not putting them out yet. They are intended to go to market. I believe testing is being done right now to determine if they are 50 state street legal. Quote Link to comment Share on other sites More sharing options...
03 DSG Snake Posted December 26, 2012 Report Share Posted December 26, 2012 Tob, I do have some pics, but I'm not putting them out yet. They are intended to go to market. I believe testing is being done right now to determine if they are 50 state street legal. Sounds promising. Even if they are not 50 state they should pass the sniffer with the stock midpipe in place. Quote Link to comment Share on other sites More sharing options...
Tob Posted December 30, 2013 Report Share Posted December 30, 2013 Any update on the shorty headers being released? Quote Link to comment Share on other sites More sharing options...
03 DSG Snake Posted January 14, 2014 Report Share Posted January 14, 2014 Any update on the shorty headers being released? This! Quote Link to comment Share on other sites More sharing options...
bravo500 Posted April 13, 2014 Report Share Posted April 13, 2014 ttt Quote Link to comment Share on other sites More sharing options...
03 DSG Snake Posted April 14, 2014 Report Share Posted April 14, 2014 Haven't seen anything. Magnaflow just released their shorty headers, but skipped the 5.4L and 5.8L GT500s... http://www.magnaflow.com/02product/00headers.asp Quote Link to comment Share on other sites More sharing options...
glroy Posted April 15, 2014 Report Share Posted April 15, 2014 Did you have to extend the stocko2 wires? Quote Link to comment Share on other sites More sharing options...
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