1986 NA S4
what header combo is the right one from Racing Beat?

Do I need an actuator port on BOTH the header and presilencer or only on one?

I see one header with a double collector and one further down with a single collector. The double has the port, the single doesn't.

The plan is to run a single setup from either HKS or Apexi.

Anyone know which parts I will need from the engine to the "catback" listed above?

Thanks!

 

you do only need the one 6 port pickup tube. if you want to bolt up to a stock, or off the shelf cat back then you need the single exit header, 16130 or 16131
and then the pre-silencer that lets you use the stock split air pipe, https://www.racingbeat.com/RX7-1986-...ers/16405.html