Unsure if anyone just started with these mods, but if so, I would love to hear from you. I don't need to hear from the sellers of the units or the unit manufacturer, just the owners of Porschese who actually put these mods on their cars. My car is still under the original warrant and has a CPO and the dealer will install, but they said if in some rare case you do get a CEL from the Plenum or Y Pipe, the cost is on me.

 

I have the plenum and y pipe installed, at first I had a CEL, but it was do to a improperly installed hose that is connected to plenum. After the install was corrected the CEL went off. I put approximately 500 miles with no problem.

 

The bigger question: Is there a significant benefit?

 

I put both mods on and never had a CEL until I took the cats out.

Lot's of threads about that already.