So I was on mazdatrix looking at full exhaust systems for the next thing to waste my money on and I saw they offered a couple different ones with what looked like minor differences but if anyone who had some knowledge of either of them could you let me know of any major difference also is there a spot of an o2 sensor or is that something I would have to add for either of them


This is the one i was leaning more towards

 

This appears to be the true dual system they offer, I had this on my my car for some time when it was NA and it held up very well. The materials they use can handle the heat of the rotary and the mufflers work excellent at toning down the NA engine sound. As a matter of fact I am still using the true dual silencer and muffler system just with a custom Downpipe that mates to my center section running in a Turbo application now. It flows plenty for my power needs.

The manifold should have the O2 bung pre-welded, also, the 86-88 system will have the split air pipe provision for your auxiliary ports to function with exhaust back pressure.

 

And in 2021 when I went Turbo :: You cant go wrong with the Racing Beat system.

-M

 

I've been running the RB road race system since around 2015. Worth every penny. Noticeable increase in power and torque in all the right places.