For 1983-Present Mercruiser Center Rise Exhaust Manifold GM 4.3L V-6
*All manifolds and risers are powdercoated black for maximum corrosion protection*
**Cast Iron manifolds and risers come with a 3 year warranty**
Use riser 51140 to complete the set.
Manufacturer: GLM Products, Inc.
Mercury Part Number: 99746A17
OSCO Part Number: 9745