So was reading the exhaust bible and was reading about the high flow cats .There was a gentleman stated that the CEL would come on is this true .Im going to put high flows on with true duals on a new 2010 and dont want or need any lights coming on (it has only 8000miles on it ) .So can anyone give some real world experience on this topic .Im on hold until i hear something about it . maybe i will wait to get a programmer then get the exhaust on .......Thanks for the input

 

If you mount the O2 sensors right after the cats you won't have the CEL. I've had my high flow cats for about 6 months and haven't had a single issue. Also passed NC inspection with no problem. Just make sure you get the shop to mount them right past the cats and you'll be fine.

 

x2 on what he said. I've got high-flows and it even shut off my CEL light

 

Me too...I had code p0420. When i put my high-flows on, my CEL dissapeaared about 20 miles later.