Re: Headers cause emissions changes, why?

[Mark Denovich <mark@domain.elided>]

Jon Pike wrote:
> I used to hear the classic Alfa cast iron headers were pretty darn good 
> anyway..  you wouldn't get much
> out of a new one, for street use anyway,  is this still the case?
I have heard that Alfa 4-cylinder cast iron manifolds are pretty hard to 
beat.  But the headers in question are V6 headers, and there is quite a 
bit to be gained.   For me having a system that wasn't rusty, had better 
ground clearance, and was easier to deal with (the flexi-pipe section is 
really handy) was as, if not more, important than additional power.

The power is impressive...  a GTV6.org poster claims +12hp in his 3.0 
mostly above 4k rpm.   I found after installing my headers, that I kept 
bouncing of the rev-limiter.   My tach is out of adjustment, and I just 
learned to shift when I felt the power plateau around 5k rpm...  It's 
not there anymore.

	--Mark
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