This Osco / Sierra Marine Manifold Mounting Kit is designed for Crusader 5.0L and 5.7L marine engines equipped with log-style exhaust manifolds and alternator brackets.
The kit provides all necessary mounting hardware for a secure and reliable installation of the exhaust manifold assembly, ensuring proper alignment and vibration control.
It replaces OEM 775-MK-A and is built from high-quality, corrosion-resistant materials suitable for both saltwater and freshwater environments.
Engineered by Osco and distributed by Sierra Marine, this kit meets or exceeds OEM performance specifications for long-term reliability.
Product Features
- Manufacturer: Osco (Distributed by Sierra Marine)
- Application: Crusader 5.0L & 5.7L marine engines
- Type: Exhaust manifold mounting hardware kit with alternator bracket compatibility
- Manifold Style: Log style
- Includes: Complete set of bolts, washers, and hardware for installation
- Replaces OEM #: 775-MK-A
- Manufacturer Item #: 9-40472
- Condition: 100% brand-new Osco/Sierra Marine replacement component
- Warranty: Backed by Sierra’s limited marine parts warranty
Additional Information
Note: Designed specifically for log-style Crusader V8 manifolds that use an alternator mounting bracket.
If you also need riser gaskets, manifold gaskets, or riser elbows, please email or fill out the contact form and we will assist you in locating all necessary components for your installation.
Shipping Information
SHIPPING: Additional shipping fees to Alaska, Hawaii, U.S. Territories, or international destinations will be calculated after checkout.
You will receive an email and a PayPal money request for the additional shipping charges at the email address provided.
(Some items are excluded from international shipping.)
Customer Support
For questions or to confirm compatibility, please email customerservice@marinepartswarehouse.com .
Please include your engine model or serial number to help confirm proper fitment before ordering.
