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Reviewed by 2 customers
Displaying reviews 1-2
Comments about Sierra Exhaust Flapper Valve - 3":
Replasced at five-year intervals while still functioning perfectly
Comments about Sierra Exhaust Flapper Valve - 5" Or 6":
You can only order it to fit a 5 and 6 inch exhaust but it doesn't work well on the 5 inch exhaust. It distorts when clamped down to fit the 5 inch exhaust. I will use it until I can find one made for a 5 inch exhaust and then replace it.