shadow7

iTrader: (3)

trying to figure out from what year rx7 this check valve came from. it has N201 imprinted on it.

need RX7

iTrader: (4)

It looks like the thing that connects to the main cat and opens up the aux ports on an S4 n/a.

misterstyx69

iTrader: (142)

that is a split air tube..it is on an S4 N/A.(well my s4's had them)..it goes from the back of the engine(passenger side,roughly,it attaches onto the firewall with a bolt),and it Runs down to a Flange that is on the side of the catalytic converter,,.the Purpose of it is to Get air to the Cat..also there is a little Nub coming off it..a hose goes on it,and it Runs to the Auxiliary Ports(5th and 6th ports)..the Back pressure in the Exhaust helps to open them up around 3500-4200 RPM(depending on Tune,etc.)

shadow7

iTrader: (3)

thanks for the help guys however, i know exactly what this part is and how it works. what im really trying to figure out is what year and model RX-7 did this part come from?????

evileagle

iTrader: (1)

S4s. so... 86-88, all models.

shadow7

iTrader: (3)

thank you!!! just curious, how did you determine this. what are the key points that make them different?

airmech1

I do not think its a split air pipe from 86-88 but 89-92 because it does not have the tee for the aux port hose.