Check with the various discount GM Performance parts suppliers.
http://www.paceparts.com http://www.sdpc2000.com . The least expensive 2 1/2" rams horn is part # 3797901. This manifold will work on both sides. There is a generator mount that needs to be cut off at least the passenger side for firewall clearance. It is very easy to cut off. These are straight down dump manifolds, so they work good on 4X4s, not sure on 2WD trucks. There are no angled dump 2 1/2" rams horns.
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Tim
[This message has been edited by Blazer1970 (edited May 22, 2002).]
[This message has been edited by Blazer1970 (edited May 22, 2002).]
[This message has been edited by Blazer1970 (edited May 22, 2002).]