Vernalift Side In/Top Out 

Extremely effective in reducing engine exhaust noise and preventing water from returning to the engine. High strength design provides a significant safety margin over other existing fiberglass lift mufflers. Exceeds ABYC specifications. For Gas/Diesel fuel type Inboards, Sailboats & Generator applications. Sound rating: Better. Use above or below the waterline.

A1: 2, A2: 2, B: 2, D: 6.38, E: 3.31, F: 1.5