Not big on high flow cats as id usually say just go off road but I found a good deal on a hi flow cattled.

-Do they increase volume over the factory cats?

-Am I going to need a tune for them to not trip lights? (forcing me to get a CAI/tune combo)

-Any other known negatives about them??

Thanks

 

They do increase flow a good bit over stock. You will need to tune for optimal performance and or if your o2 sensors are moved.

 

I've heard of them constantly tripping the engine light? Is this before a tune?

Anything special needed for moving O2 sensors? Extenders? Or Is it just swapping them over

 

I'm pretty sure they are plug and play. Just higher flowing cats with the o2 in the same basic spots. I haven't seen where tune is needed when just changing to high flow down/mid pipe. Someone please correct me if I am wrong...<----- I know you would even if I didn't ask

 

PS link to good deal if you don't mind sharing.

 

I don't know how well the high flow cats actually work but they are doing something. All cars that came with cats are required to have cats. Unless your state or county required a tailpipe analyzer test, high flows should be good. Off road is still better for performance(not environment)lol. If you can get away with off road I would recommend going off road.

 

Lights probably from before tune. You should not need a tune but will benefit alot more with a tune. Nothing special is needed just unscrew o2 sensor and screw back into new HF cats.

 

The deal is someone local to me. It a magnaflow cartted X. Does 500 sound like a good deal?

 

seems a little high google the part number and also check fleebay. Or is that an installed price?

 

They're $800+ brand new