This header was made to order for me from Bob Boig of SCCA fame. This is the header that is on all the Top EP GTlite and GT2 miatas. Built for high HP, high revving engines. However I went one step above and had Bob work with SPD to build me a custom collector to work optimally with the header. The collector has an o2 bung that is set at the proper height for the o2 sensor sits flush and doesnt affect velocity. header was originally $650 or so. And the collector was $550. Then I had them both ceramic coated. Overall I think I have about $1400 in this header/collector.
I will take $800 or something close.

the unmounted pics are before coating

 

Are you aware of the design specs? Trying to determine if this will work well for my build.

-primary diameter
-choke diameter
-outlet diameter

Thanks!

 

1 5/8" primaries
2" choke
2.5" outlet

 

Great deal!

 

It really is a good deal. Jesse Prather might buy it

 

I thought they were only made in 1-3/4" and 1-7/8"?

 

I might be wrong. It might be 1 3/4". I will check tomarrow.

 

bump

 

Is the collector permanently attached or removable at the primaries?

 

Removable.

 

You have PM.

 

Bad *** header.