VIPER7

i am trying to find out how the flexabilty of the Trident Blue Silicone exhaust hose compares to standard OEM Mercury Flexable exhaust hose used on Mecury Racing HP 525 EFI. I need a hose that is flexable enough to fit a 4" hose thru a 4 1/4 " hole and then go back round when thru the exhaust transom hole. This will allow me to install new exhaust hoses without pulling the headers. Hoses as flexable as or perferably more fleable than the stock Merc hoses will work. The silicone hose is about 1/8" smaller in diameter which helps. Any help would be appreciated.
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Thanks,
Boyce