Manifold ETX CAT STB - 531400hl

- Starboard-side ETX CAT exhaust manifold for GM small-block marine engines like the 5.7L Monsoon
- One-piece aluminum design with black factory finish and built-in, non-serviceable catalyst
- Requires replacement if catalyst fails; not serviceable or rebuildable
- Does not include gasket, sensors, fittings, or hardware (sold separately)