Cats are the question

[Humdingah]

MIL = Malfunction Indicator Light ('Check Engine' light)

SIMS = You can purchase a SIM, which is a connector that will 'simulate' the cat still being there.

Catalytic Converter SIM

'Delete Cat Efficiency Monitor' would be a setting in EFILive that would allow you to ignore any signals that arrived due to the cats not being there anymore.

[guruerror]

If someone actually moves forward with this and deletes their cats on their H2, please post back results. CELs, performance, MPG, sound, etc...

Thanks.

[IRA51]

I CAN TELL YOU FROM EXPERIANCE ,THAT UNLESS YOU HAVE A BUILT ENGINE WITH BIG HP theis isn't much to be gained by eliminateing the cats if they are not cloged . the Magnaflow cats flow pleanty good on a stock engine if your factory cats are cloged and need replaced .