Has anyone used the stock Pre-cat type header to make a turbo manifold????

 

Why?

 

yuck,....very ineffecient!

 

IT'S better than a log style!!

 

So you are going to either cut the flange off or make a new flange (that bolts to bot) and just add the turbo? Then get rid of the cat and bolt it to your exhaust. The reason I ask why is because manifolds are relatively cheap as far as components go. You should be able to get one for $400 or so, maybe less. I assume you will by a used turbo and then rebuild it(hopefully). This isn't something you really want to cheap out on. You could piece together a system for roughly 1000-1500 or you could buy one for $2600 with all new parts.

 

*Note: the Flyin' Miata Turbo does keep the 1st cat (if that is your concern...)

 

Nope this if for an OBD 1 probe..