Skip to product information
860246A15 860246Q11 51230 Exhaust Manifold for MerCruiser GM V8 305 350
$1,121.99
Sale price
$1,121.99
Regular price
Quantity
Pickup currently not available
Secure Checkout • Encrypted Payments
Free Shipping
Contiguous U.S.
1-Year Warranty
Parts you can rely on
30-Day Returns
Hassle-free returns
Need help confirming fitment?
Talk with a parts expert today.
Parts Support Hours: Monday–Friday, 8:00 AM–5:00 PM CT
Live Chat: Available 24/7
I needed a forklift part and wasn’t sure which one fit. They asked for the model and serial number, got back to me quickly, and made sure I ordered the right one. Really helpful.
Randy W. — Verified customer
Equipment Fitment
Review the equipment and model information below. Fitment can vary by serial number, production date, or machine configuration, so confirm your model and reference numbers before ordering.
Equipment / model
- MerCruiser GM V8 305 (5.0L) engines
- MerCruiser GM V8 350 (5.7L) engines
- Replaces OEM part numbers 860246A15, 860246Q11, and 51230
Product Overview
This exhaust manifold is a direct-fit replacement for MerCruiser GM V8 305 and 350 marine engines. It channels exhaust gases away from the engine cylinders to the exhaust system, ensuring efficient engine performance and reduced backpressure. Designed for boat owners and marine mechanics, this manifold restores factory function and durability.
Key Features & Performance
- Cast iron construction for heat resistance and long service life
- Direct bolt-on design for easy installation with no modifications required
- Corrosion-resistant coating helps withstand marine environments
- Precision-machined mounting surfaces ensure a leak-free seal
- Compatible with both fresh and saltwater cooling systems
Common Uses
- Replacing a cracked or corroded exhaust manifold on MerCruiser sterndrive engines
- Restoring exhaust flow on marine V8 outdrive systems
- Rebuilding older MerCruiser engine blocks during overhaul
- Upgrading to a direct-fit OEM-style replacement
Technical Specifications
- Material: Cast iron
- Part Number(s): 860246A15, 860246Q11, 51230
- Engine Fitment: MerCruiser GM V8 305 (5.0L) and 350 (5.7L)
Frequently Asked Questions
Q: Is this exhaust manifold a direct replacement for my MerCruiser 350? A: Yes, it is designed to directly replace the factory manifold on MerCruiser GM V8 350 engines using the listed OEM part numbers.
Q: Does this manifold include gaskets or hardware? A: This listing is for the manifold only; gaskets and mounting hardware are typically sold separately.
Product appearance and specifications may vary slightly by batch. Compatibility may vary by serial number. Verify fitment before purchase.