Riser Spacer Block 3 Inch high that is used on Barr Style and Marine Power center riser manifolds.
It goes between the riser and the manifold to raise the exhaust level to ensure a downward exhaust slope.
Can be stacked if more than 3 inches is needed. Also has a 3/4 inch
NPT threaded hole to accept water for various cooling system styles.
The riser mounting pad for this spacer is 3-5/8 x 5-5/8 with mounting bolt centers 2-5/8 x 4
Replaces Barr #: 20-0097.