Inliners International Forums General Discussion Engines 292, 4 barrel, 2.5" exhaust??

A thin blockoff plate would protect against exhaust erosion too, I've seen exhaust erosion / corrosion go right thru.

As far as exhaust, of course, I'd say 2.5" single all the way is a minimum for a healthy 292 - much over 200hp and you'd need more than that.