I had a buyer for this but it fell through so it’s going up. This is a ceramic coated Hotshot header for the Spec V, SE-R, and Altima 2.5S (2002-2005 for all). The flange is perfectly flat, no leaks.
Here’s a review from Nissan Performance Magazine.
http://www.nissanperformancemag.com/may02/specvmay02.php
Taken from the link.
“At peak RPM the QR25DE gained an amazing 12 hp and 11.7 ft-lb of torque. Even more impressive was the fact that the gains averaged above 10 hp from 3250 RPM all the way up to peak. Without a doubt Hotshot Performance has another winner with the QR25DE header.”
I had similar gains when I dynoed at PE Tuning.
EDIT: NEW PRICE $220