Just curious, what is the difference between the two? I know the PRO has the pie crusted tip, otherwise is it pretty much the same? Also is there a way to tell if its Titanium vs SUS?

Thanks,

 

There is no FX. There is the FX-Pro (Titanium) and R304 (stainless)

 

Actually there is :

https://www.nengun.com/js-racing/titanium-fx-70rs

Its been discontinued.

 

Ohh nevermind. I found the answer, it was kinda right in front of me : But from the description on evasivemotorsports.

"The FX-Pro line of full titanium exhaust systems is replacement to the FX series of J's Racing exhausts. The exhausts feature a revised design for increased durability and strength"

So I guess the gains etc are the same, but just stronger?