GHmarine Upper Exhaust Bellow 4" Tube for MerCruiser V6/V8 — CR Rubber with Stainless Clamps

GHmarine 44348T is a 4" upper exhaust tube bellow engineered to connect the riser to the elbow on compatible MerCruiser V6 and V8 engines, built from CR rubber with stainless-steel clamps for durable, OEM-style performance.

This replacement exhaust bellow fits many MerCruiser marine engines—including 4.3L, 5.0L, 5.7L, 7.4L and 8.2L models—and is designed to match or exceed original equipment specifications. It replaces part numbers such as MerCruiser 32-44348T and Sierra 18-2748, providing a flexible, corrosion-resistant connection between the center riser and elbow on boats that use a 4" exhaust system. Whether you’re restoring an older vessel or repairing routine wear, this bellow offers a direct-fit option intended for long-term marine use.

Will this exhaust bellow fit my MerCruiser engine?

Compatibility covers a broad range of MerCruiser V6 and V8 engines that use a center riser manifold with a 4" exhaust tube, from early 1980s models to current applications. Check your engine’s part number or the exhaust tube diameter to confirm fit before ordering.

• Fits 4.3L, 5.0L, 5.7L, 7.4L and 8.2L MerCruiser engines
• Replaces MerCruiser 32-44348T, 32-44348001
• Also cross-references GLM 89120, Mallory 9072805, Sierra 18-2748
• Designed for center riser to elbow connections with 4" exhaust

How is this bellow constructed and why does that matter?

The GHmarine 44348T uses chloroprene (CR) rubber that resists heat, oil and saltwater exposure better than plain rubber, and comes with stainless-steel clamps to reduce corrosion at attachment points. Robust materials extend service life and help maintain a reliable exhaust seal under vibration and temperature changes common in marine environments.

• CR rubber for heat and chemical resistance
• Stainless-steel clamps to minimize corrosion
• High hardness formulation to resist deformation under pressure
• Manufactured to meet or exceed OEM dimensional standards

What should I know about installation and maintenance?

Installation is straightforward for technicians familiar with marine exhaust systems: remove the old bellow, inspect mating surfaces, slide the new bellow into place and tighten the clamps evenly. Routine visual checks for cracks, hardening or clamp corrosion will help catch issues before leaks develop.

• Direct replacement—no custom cutting in most OEM applications
• Ensure mating surfaces are clean and free of corrosion
• Tighten clamps evenly to avoid pinching the rubber
• Inspect every season or after heavy use for wear signs

What are the benefits compared with older or generic alternatives?

This bellow’s materials and OEM cross-reference list make it a dependable substitute for worn originals. Compared with basic aftermarket hoses, the GHmarine 44348T emphasizes corrosion resistance and dimensional accuracy to reduce installation fuss and improve long-term reliability.

• OEM-matching dimensions for direct fitment
• Improved corrosion resistance from stainless clamps
• Durable CR rubber formulation for marine conditions
• Cross-referenced to common MerCruiser part numbers for confidence

Who is this for? The GHmarine 44348T is intended for boat owners, marine mechanics and restoration specialists needing a reliable 4" upper tube exhaust bellow for MerCruiser V6 and V8 engines. It suits anyone replacing an aging, cracked or corroded bellow on vessels that use center riser manifolds with a 4" exhaust, and for professionals who prefer components built to OEM-like standards for easier installation and predictable fitment.