Upper Exhaust Tube Bellows – Fits MerCruiser V6 & V8 (Replaces 32-44348001, 32-44348T)
Upper Exhaust Tube Bellows – Fits MerCruiser V6 & V8 (Replaces 32-44348001, 32-44348T) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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Upper Exhaust Tube Bellows – Fits MerCruiser V6 & V8 (Replaces ...
Upper Exhaust Tube Bellows – Fits MerCruiser V6 & V8 (Replaces 32-44348001, 32-44348T) is backordered and will ship as soon as it is back in stock.
Product Details
Our Upper Exhaust Tube Bellows provides a reliable seal for the exhaust system on MerCruiser V6 & V8 engines, including 4.3L, 5.0L, 5.7L, and 7.4L models manufactured between 1987 and 1998. It is specifically designed for late-model engines with center-mounted risers.
This part serves as a direct interchange for MerCruiser part numbers 32-44348001 and 32-44348T. It also cross-references with aftermarket equivalents including Sierra 18-2748, GLM 89120, and Mallory 9072805.
- Designed for simple and secure clamp-on installation.
- Connects the exhaust elbow to the exhaust tube.
- Includes two stainless steel hose clamps for a complete replacement.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| MerCruiser | 32-44348001 |
| MerCruiser | 32-44348T |
| Sierra | 18-2748 |
| GLM | 89120 |
| Mallory | 9072805 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This bellows fits a range of MerCruiser engines. Please verify compatibility using your engine's model and serial number range provided in the "Notes" column.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| MerCruiser | V6 & V8 | 4.3L, 5.0L, 5.7L, 7.4L | 4-Stroke | 1987–1998 | 32-44348001, 32-44348T | Late model with center mounted risers |
| MerCruiser | 260 GM | 4-Stroke | 1987 | 32-44348001, 32-44348T | 0B525982 THRU 0B773304 | |
| MerCruiser | 230 4 BBL. GM | 4-Stroke | 1987 | 32-44348001, 32-44348T | 0B525982 THRU 0B773739 | |
| MerCruiser | 200 2 BBL. GM | 4-Stroke | 1987 | 32-44348001, 32-44348T | 0B525982 THRU 0B774444 | |
| MerCruiser | 350 MAG. ALPHA GM | 4-Stroke | 1987–1995 | 32-44348001, 32-44348T | 0B525982 THRU 0F600999 | |
| MerCruiser | 5.7L GM | 4-Stroke | 1988–1995 | 32-44348001, 32-44348T | 0B525982 THRU 0F600999 | |
| MerCruiser | 7.4L BRAVO GM 454 | 4-Stroke | 1988–1991 | 32-44348001, 32-44348T | 0B771113 THRU 0D603117 | |
| MerCruiser | 5.0LX 4 BBL. GM | 4-Stroke | 1988–1995 | 32-44348001, 32-44348T | 0B773740 THRU 0F600999 | |
| MerCruiser | 5.0L 2 BBL. GM | 4-Stroke | 1988–1995 | 32-44348001, 32-44348T | 0B774445 THRU 0F600999 | |
| MerCruiser | 350 MAG (SKI) GM | 4-Stroke | 1991–1996 | 32-44348001, 32-44348T | 0D505450 THRU 0K040399 | |
| MerCruiser | D4.2L/220 IDI VM 254 | 4-Stroke | 1994–1998 | 32-44348001, 32-44348T | 0D554732 THRU 0M999999 | |
| MerCruiser | 7.4L BRAVO GEN. V GM | 4-Stroke | 1992–1996 | 32-44348001, 32-44348T | 0D603118 THRU 0F800699 | |
| MerCruiser | 4.3L (GEN II) 2 BBL. GM | 4-Stroke | 1992–1993 | 32-44348001, 32-44348T | 0D714107 THRU 0F000877 | |
| MerCruiser | 4.3LX GEN II 4 BBL. GM | 4-Stroke | 1992–1993 | 32-44348001, 32-44348T | 0D714370 THRU 0F001219 | |
| MerCruiser | 454 MAG. BRAVO GEN. V GM | 4-Stroke | 1992–1993 | 32-44348001, 32-44348T | 0D805069 THRU 0F304999 |
Technical Specs
- Product Type
- Upper Exhaust Tube Bellows
- Installation
- Clamp-On
- Fuel Type
- Gasoline
- Connection
- Exhaust Elbow to Tube
- Housing Material
- Rubber
- Housing Color
- Black
- Dimensions
- 4" Inside Diameter
- Fitting Type
- Stainless Steel Hose Clamps
- Warranty
- 1 Year (Varies by Manufacturer)
What’s in the Box
- 1 x Upper Exhaust Bellows (Replaces 32-44348001/32-44348T)
- 2 x Stainless Steel Hose Clamps
Installation Notes
- Ensure the engine is off and has cooled completely.
- Locate and access the existing upper exhaust bellows.
- Loosen and remove the hose clamps securing the old bellows.
- Carefully detach the old bellows from the exhaust elbow and tube. Note its orientation.
- Clean the connection surfaces on the elbow and tube, removing any old sealant or debris.
- Position the new bellows, ensuring it is properly seated on both ends.
- Secure the new bellows using the provided stainless steel hose clamps.
- Tighten the clamps firmly but do not overtighten, which could damage the rubber.
- After installation, run the engine and inspect for any exhaust or water leaks around the new bellows.
Troubleshooting & FAQ
How do I know if this bellows will fit my specific MerCruiser engine?
The most reliable way to confirm fitment is by checking your engine's model and serial number against the ranges listed in our Engine & Model Compatibility table. While it fits most V6 and V8 models from 1987–1998, serial number breaks are the definitive guide.
What are the common signs of a failing exhaust bellows?
Signs of a worn or failed exhaust bellows include water leaking into the bilge area, noticeable exhaust fumes in the engine compartment, a change in engine exhaust sound, or the engine overheating. Visual inspection may reveal cracks, splits, or perishing of the rubber.
How often should I replace the exhaust bellows?
There is no fixed service interval, but it is a critical wear item. We recommend inspecting the bellows annually for any signs of cracking, brittleness, or fatigue. For preventative maintenance, consider replacement every 3-5 years, especially for boats used in saltwater.
Can I reuse my old hose clamps?
It is strongly recommended to use new clamps. The original clamps may have lost tension or suffered from corrosion. For a secure, leak-free seal, always use the new stainless steel hose clamps included in the kit.
Is any sealant required for installation?
Generally, no sealant is required if the connection surfaces are clean and the bellows is installed correctly. The clamps provide the necessary sealing pressure. However, some mechanics apply a thin layer of marine-grade adhesive or sealant as a precaution.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
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