So I want to buy and install a Apexi N1 Dual Cat Back system on my Mazda Rx7 Turbo 2 because I love the look of it and how it sounds. So I am wondering what all I will need to install it? It does not come with a downpipe or mid pipe piece. I was looking at purchasing a package like this from Enjuku Racing. APEX'i Dual N1 Cat Back Exhaust for FC RX7 - Enjuku Racing Parts, LLC What all will I need to install this on my car? It currently has a Racing Beat Rev 2 system on it. Thanks!

 

You should be able to use the down pipe,then a piece to connect the downpipe to the catback.
If you are not fond of the RB presilencer you can scavenge the flanges,but I am not 100% of the Apexi flange matiung to the RB presilencer flange.
This of course is a Weld job,so If you can do it yourself then more power to ya.
If not then take the car and your new stuff into a shop and get them to hang it and construct a piece to go between the DP and Catback flange.

 

the N1 is a cat back, so it will have a stock sized flange in the stock spot, you'll have to fab something to go in between the RB presilencer and the N1. its an easy job at a good muffler shop

 

the n1 has a 3" flange and the rb presilence has 2.5" if I'm right. so u might have to fab a straight pipe.

 

RB Rev II Presilencer has a 3 inch flange( the big can)
The other tubular Hookah looking POS has the 2.5.
2 sizes of TII exhaust.