Motordyne ART pipe, but Cat is necessary..
 

My current exhaust is HFC(300sell) and custom CBE.
I'm very interested in the Motordyne ART pipe, but the catalyzer is essential in my country.
So, I'm considering the Motordyne ART pipe and Motordyne XYZ pipe(with HFC) and the next line customized.
What I'm curious about is that the Motordyne ART pipe and Motordyne XYZ pipe(with HFC) would be better than my current exhaust or less, or same as.
What is your opinion?

you just said custom CBE... and HFC, you need to specify brand.

All Motordyne products are going to be top notch and I can assure you, you will gain more power than you likely are getting now. I don't know if the HFC on the XYZ will be enough for your countries specs. Tony could help you with that.

Hi Someday,

What is your current catback setup?

Tony

My cat is Exoticspeed 300sell HFC, and My CBE is no brand(customized by hand)
The line of my CBE is somewhat like the F.I, but the diameter is different..
The OD of front line is 2.12" and from the middle to the end is 2.5".
In the middle, the pipe is joined in the shape X.

How would you connect the XYZ pipe to your existing exhaust? Or do you plan to use a different Y-back on it?

I plan to use your XYZ pipe(with HFC), and I will connect the XYZ pipe with the back-line(after XYZ pipe) customized by hand or your comming line . I want to know the difference your Art pipe and XYZ pipe(with HFC) from the current HFC and X pipe.

I haven't compared your setup so its not quantifiable without a direct test.