Question for Quat D Ex box owners

[caperix]

Does the Ex box system for the DSS bikes have a bung for an O2 sensor?  If so is it in the front or rear pipe, if not are the header pipes weldable without removing any coating?

[peerke]

Yes mine does.

Its in the rearpipe and the frontpipe.
You can choose.

[caperix]

Great thanks for the info