Anybody using this Nismo header on their stock 240Z motor? Are you running a resonator? Which muffler? Do you stay 2" from the collector out?

Performance Header:
14004-S3070
Designed for square ports with 1 1/2" primary tubing, the header is a 6 into 2 into 1 design with a 2" collector.

It is painted and I figure I would have it jet coated before installation. My '71 240Z's header is rusted and needs replacing. Thanks!