I emailed the folks at arizonazcar.com about getting the primary and secondary diameters for their Zcar 6-1 equal length header and so far have yet to get a reply - it's been like 2 weeks. Does anyone have this data they can share with me?

(Am wondering if it is worth keeping the non-equal length 3-2-1 header I have right now.)

After much consideration, I decided on the Nismo unit with the 1 5/8 primaries. They are 32" equal length headers. Very nice. I hope mine will be here soon.

Got it from Strictly Z. Ask for Yuichi.

Mike