right now i have a 2.5 inch stainless steel xpipe exhauset system by magnaflow. should i replace this with a cat back system? would it be worth it or even a change at all? if yes, what would be a recomended replacement?

 

ummmmm...

Correct me if I'm wrong, but I think yo umean a Y pipe.

X or H pipes are for V6 and 8 (or more) Engines that have a header on each side that dotn connect.

 

I've read many times that X-pipes do not do much of anything on a rotary, I believe it has something to do w/ the exhaust pulses

 

Yep. X-pipe is designed for a "V" engine. The pulses from the firing pipe help draw out the pulses from the opposite side as the exhaust opens.

 

so everyone is in agreement that a cat-back is definitely the way to go?

 

The question you are TRYING to ask is wether its better to go with a DUAL exhaust Cat-Back, or a Single sided Cat-Back.

now try it again

 

LOL, assuming that this IS the question, the choices are basically:

Single exhaust = More power, less weight, less cost, better look on an FD or FB
Dual exhaust = Better sound, better look on an FC

Choose whatever you like.

 

stupid question, what is the difference in an FB, FB, and FC?

P.S. I am jsut getting into the hobbie, so please humor my newbie question

 

FD= 3rd gen rx7
FC= 2nd gen rx7
FB= 1st gen rx7 but i believe the correct name for FB is SA

all these letters are chassis codes

 

SA (SA22C) = Series 1 (78-80)
FB (FB33) = Series 2 (81-83) and Series 3 (83-85)

Although not exactly correct, Americans tend to call all of the 1Gen RX-7's by the FB name, while most of the rest of the world usually uses the SA designation. Confused yet?

This site may help:
http://www.monito.com/wankel/wankel.html