I was recently given the opportunity to test a set of non-fouler prototypes built by Motordyne. After driving down to MRC it was determined that the prototypes did not fit my 07 HR equipped Z.

MRC kept the prototypes, and I PMed Tony telling him that the DE engine's O2 sensors are a different size than the HR engine's. So if any of you DE equipped Zs are having issues with CEL codes P0420 (TW (Two-Way) Catalyst System, Bank 1) and/or P0430 (TW Catalyst System, Bank 2), send a PM to Tony (Hydrazine) telling him you'd like to test his prototypes.

This is a great opportunity for you to fix your CEL with these free prototypes built by Motordyne.

 

I think those are the ones Julian is putting on my APS test pipes.