Another AE86, Duracell. Now with VEMS, and cage...

[Uzelac]

Been searching for a good header for months/years.
As I couldn't find we decided to do one:

Made of 40mm (37mm Id) stainless T304 pipes with mandrel bent tubes.

Friend is a skillful velder:


40mm tubing (37mm ID) / Slip on collector / 4-1 design / 700mm runner lenght




In place:



Hope it won't be colorless too long
Collector output is not finished, not sure if i should run 55/60 or 63mm.
I'm closest to 60mm..

Does anyone know, why some headers have restriction cone after collector and than they go back to standard exhaust diameter ?
Think they call it taper.

Should i try with that option ? Maybe 40->60 (collector) -> cone to 55mm -> cone back to 60.5mm ?

Thanks