computertom

Anyone running long tubes with high flow cats in Massachusetts? I actually don't want to run catless (been there done that, don't need the attention), but would really love the power to be had.

Would love some feedback. Anyone actually passed inspection?

Thanks,
Tom

AMG6.3

You will have problem passing MA inspection with long tube headers. It is not worth the risk.

KillaC63

You will pass OBD testing and the sniffer with catted (49 state legal) AR/MHP Longtube Headers with X pipe, and the gains are still huge. There is a Group Buy going on now which you can see here: https://mbworld.org/forums/c63-amg-w...oup-buy-6.html

C63-AMG

Mass here also. No issues here.