Emissions control equip removal... WAS: EGR Tube with a turbo

[Wayne Cox]

At 11:16 AM 5/21/2003 -0500, you wrote:
>just about all of you who have a header make a lot more cold start
>polutants even if you cat is hooked up.  The header makes the cat take
>take over twice as long to light off.

Why is that?  Doesn't the cast iron manifold have a larger heat capacity
than a steel tube header?  Seems like the header would get up to temp more
quickly, and spend less time soaking up exhaust heat.

    -Wayne  91 NK2k,  93 NX2k,  92 SE-R-Parts-Car