[dannichols1474]

Originally Posted by scarceller

How long are those primaries from the head to the collector? 30-32" ? If so those are known as long tube headers and have a sweet spot tune point in the 5000-6000 RPM range and that's good for the 3.0 but 1 3/4" are a bit to large. Would have been better if 1 5/8" header.

But I'm most interested in the runner lengths.

Hi Sal,

I'll measure those runner lengths tomorrow and post them on the new thread I started to focus on this header size discussion.

http://forums.pelicanparts.com/porsche-911-technical-forum/1165423-exhaust-header-size-my-rebuilt-2-7l-motor.html#post12300226.