Left Exhaust Manifold for 1991 Ford Country Squire -- 674-184-AT Dorman. Exhaust > Exhaust Manifolds > Exhaust Manifold.Left, Quantity needed per vehicle: 1. New Since 1918, Dorman Products is a leading supplier of original equipment dealer exclusive automotive and heavy duty replacement parts, automotive hardware, brake parts, and fasteners to the Automotive and Heavy Vehicle Aftermarkets. New to the Aftermarket is our exciting niche allowing us to provide hundreds of new products to our customers and end-users each month and thousands each year. This is what we proudly do, but it's our Contributors who provide the Fuel that drives our Company to success! When you join Dorman you will be joining our Culture of Contribution team, where everyone has the opportunity to make a meaningful impact on our business and future success.