That Hooker super comp header was pricy back in the day - over 200 in 1980's dollars. It was the better of the 2 headers they made - on a par with the Doug Thorley Tri-y in price and quality for the day. My friend Trkdesigner has a Cyclone anti-reversionary header I gave him years ago from the early 80's - it has anti-reversion cones in the exhaust ports to promote better scavenging of the exhaust.