Marine Exhaust Elbow Mounting Kit Compatible With 1952-1976 Mercruiser Replaces 4354-Mk Direct Fit

OEM PART NUMBERS:
• MPN: 18-8505
• 9-40578 / 940578
• Osco: 4354-MK / 4354MK

SPECIFICATIONS:
• Product Type: Exhaust Elbow / Riser Mounting Kit
• Application: MerCruiser GM V8 Big Block 454ci (7.4L) Inboard Sterndrives
• Models: MerCruiser 330, 340, 7.4L with 4" OD Riser
• Compatible Risers: Sierra 18-1976-1, 18-1976-2
• Compatible Manifolds: Sierra 18-1952-1, 18-1953-1, 18-1957-1
• Kit Contents: Gaskets, Studs, Hardware for Exhaust Elbow Installation
• Condition: New

MERCRUISER APPLICATIONS:
• See Applications column for complete fitment

PRODUCT NOTICE:
As a parts distributor we mostly sell aftermarket parts (any OEM parts would be noted as such). Aftermarket parts are not sourced from the original vehicle or equipment manufacturer, but are designed to function the same as - if not better than - the original. All parts sold are new.

WARNING - This product may expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov