Re: 32'Fevers...no more exhaust rattles at idle
 

Mike, did your WP increase with the SM change? Mine is now running 30-35psi at approx 4000rpm, (I forget, but just at cruise speed) It looked like the stock exhaust had larger exits for the water over the SM's at the ends of the risors. I may take them off and open them up more. The WP was high with the stock exhaust, but at a higher RPM though.
I had no signs of reversion or leaking gaskets in the manifolds. Yet :p

Re: 32'Fevers...no more exhaust rattles at idle
 

US1, I really do not remember a serious WP change...sorry it was 7 years ago.