Jolly_John Posted February 22, 2012 Share Posted February 22, 2012 Hi, Gang. Are the left and right exhaust manifolds on a 1965 Riv GS different, compared to the left and right exhaust manifolds found a "regular" '65 Riviera?I know the '65 GS has a larger diameter exhaust pipe system, but I didn't know about the manifolds themselves. Thanks for any help! John Link to comment Share on other sites More sharing options...
Guest Rob J Posted February 22, 2012 Share Posted February 22, 2012 From my research, they are the same, but Tom Mooney would know positively. Link to comment Share on other sites More sharing options...
sharknose1 Posted February 23, 2012 Share Posted February 23, 2012 John,I restored a 1964 with dual quad 425 kx engine and the manifolds appeared to have never been taken off.They were the same as the standard manifolds.When I ordered the exhaust from Waldren's Exhaust the exhaust diameter was 2 1/4" but went down to 2" diameter about 2" before the mounting points to both manifolds. Link to comment Share on other sites More sharing options...
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