Originally posted by Monstour:
what do headers do?
Just like everyone tries to open up and upgrade their exhaust, it begins with headers. Our stock manifold is very restrictive and headers give us more air flow through the exhaust which usually gives more power.
Yeah....I gained 10HP peak and between 5600-6500 I gained 13HP and 19TQ from dyno without header and dyno with.  That is with the 4-1 race header.
Hector
2003 Rally Red Mitsubishi Evolution VIII
257HP/259TQ
2005 Lapis Blue Mazda 6s
RET: 00 Cabernet Red Ford Contour Zetec ATX SUPERCHARGED
160HP/141TQ
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