I have 85 rx7 with 13B swap running holley 600 with streetport and exhaust. now Im wanting to do 4 port swap using my engine its a 89 13B and I am being told that turbo 2 housing fit for the 4 port conversion. Now I wouldlike to know what I need to do,;swap the rotor housing for t2 and does that make it 4 port? Or do I need the T2 Iron front , middle , rear to streetport and use all my internals from my engine to make this 4 port? Thanks

 

do they not Make an Intake you could use on the SiX Port?. instead of making the engine into A four port.?..It Would be much cheaper... I looked at MazdaTrix.It is $255 for a Manifold..That is alot cheaper than Building a 'new engine",which is going to need a Rebuild Kit(say roughly 700-900),and then new Parts to Boot!

 

You mean 4 port intake of course that do ,or im sorry if you ment some other intake, well to me no 6 port is true until you get 4 port irons but I want to make sure through rotorheads because I want to make my 6 port into a 4 port and my buddy said to swap housings for t2 one ad It doesnt sound right to me because thier are no intake port on rotor housings you feel me?

 

you use the side housings from the T2 to do what you want to do. the only differences between the T2 and N/A rotor housings are the spark plug placements and exhaust port sleeves - neither of which make a huge difference if you're not going turbo (or even if you do).

i take it you've already confirmed that there is a Holley manifold for that bolt pattern though, yes?

 

Yes through racing beat, I'll sell my 6 port intake for the swap later, well to confirm I can use my rotor housings and get some t2 irons to make this 4 port thing work correct?

 

yes, correct. go for it and show it to us.