Sierra 18-1998-1 Universal Center Rise Exhaust Manifold for Ford V8

The Sierra 18-1998-1 is a universal center riser exhaust manifold designed for both port and starboard installation on Ford V8 marine engines. This exhaust manifold fits Ford 302 cubic inch and 351 cubic inch V8 marine gas engines, making it a versatile replacement solution for various marine applications.

Key Features:

• High-quality cast iron construction for maximum durability in harsh marine environments
• Fits either side of the engine (port or starboard)
• Primed and painted for added durability and protection
• Includes all necessary gaskets and hardware for easy installation
• Contains exhaust elbow gasket, exhaust manifold gasket, and pipe plug
• Riser mating bolt dimensions: 4 inches (101.6mm) by 2-5/8 inches (66.7mm) center-to-center
• Ready to install out-of-the-box

Manufactured as a direct OE replacement and fully interchangeable with the OEM products it is designed to replace. This manifold is interchangeable with Barr FM-1-83, FM183, GLM 56250, Mallory 9-40111, Osco FL994, and FLCR818. Each purchase includes one manifold.