Exhaust Riser
C-28, C-34, C-350

Unlike the original equipment part, we have the stainless steel riser electropolished after welding. All additional stainless fittings (elbows etc.) are also elecrtopolished. Electropolishing (often described as the reverse of electroplating) passivates the metal by removing the ferrous metal from both the inside and outside surfaces of the tube. This is especially important at the welds where the welding process disturbs the metal structure and makes it more susceptible to rust and corrosion.

Due to the subtle differences in length, shape and angles you must send your old riser to achieve a proper fit.

The only way to remove the exhaust riser from the boat is to remove the exhaust flange from the engine. This dictates that, at a minimum, you will need to replace the gasket. Most customers report the exhaust flange is impossible to remove from the old riser. The male thread on the end of the riser is typically seized to the female thread of the exhaust flange. If this is true for your parts, you will need a new exhaust flange too. Both are available below under "May we also suggest" below.

Always install a hump hose between the exhaust riser and the aqua lift muffler. The hump hose is more flexible than standard exhaust hose. It will help prevent damage to the muffler caused by the harsh vibrations of the diesel engine. See "May we also suggest" below.

Used on:

Catalina 28

Catalina 34

Catalina 350
When equipped with a Universal M-25XPB, M35 or M35XPB engine.

We offer the exhaust flange and gasket for this particular exhaust flange. See "May we also suggest" below.

Notes:
1) A 50% deposit will be billed when your order for this custom order item is accepted. The balance will be billed when the product ships.
2) Custom items are made individually for you and may not be canceled or returned, so please choose carefully.