Jon... I have allways used the steel gasket that came with the Sr RR engine for a gasket with no issues. as for the secondary gasket. SCE.. http://www.b15sentra.net/reviews/showproduct.php?product=109&sort=7&cat=35&page=1 #6 STS Matt Davis 2001 Inferno Nissan Sentra SE w/performance package www.b15sentra.net www.sr20forum.com