I recently bought and installed a 69mm throttle body and installed a port matched intake manifold as well. I changed my mind and want to go with a smaller one because this one i think is to big. My question is, can i put my stock throttle body onto the ported intake manifold or do I have to put the stock manifold back on as well???

 

Anybody?

 

u should port match them..or else u wont see any real gains

 

You will be fine using stock tb on ported manifold.
Glenn

 

did you already install the bigger tb? You can reuse the stock tb just make sure to use a new gasket

 

Thanks for the info guys, yeah i already installed the 69mm throttle body. I think i'm going to go a little bit lower like a 62mm or something. The 69mm is kinda slugish in lower rpms.