4.595 in. Cylinder Bore
- High-Density Cast Iron Construction
- Priority Main Oiling
- Front Oil Inlet and Restrictor Provision
- Bores to 4.625 in. max
- Cylinder Walls 0.310 in. @ 4.600 in. Bore
- Valley Accommodates OE Roller Lifters or Use +.300 in. Tall Aftermarket Lifters
- Clearance for 4.375 in. Stroke - 9.800 in. Deck
- Splayed 4-Bolt Main Caps with Dowels & Stepped Register, ARP Fasteners
- 2-Piece Rear Main Seal
- 2.120 in. Standard Cam Bearing Bore
- OE-style Fuel Pump & Starter Mounts
- 270 lbs.
Modern Advancements for a Superior Big Block Chevy
World Products has redesigned the famed Merlin Big Block Chevy casting, incorporating numerous improvements and new features, designated the Merlin IV. New features include thicker main webs and thicker cylinder walls for increased strength and durability. The Merlin IV also has an increased volume priority main oiling system with a front oil feed for dry sump systems and front oil cross over with restrictor provisions to provide racing engines with oil where they need it the most.
WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.
WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.
WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.