Head Bolt Set for 2.5L 153 & 3.0L 181 CID 4-Cylinder Marine Engines | High-Performance Replacement

Upgrade and secure your engine with this high-quality head bolt set, designed for GM 2.5L (153 CID) and 3.0L (181 CID) 4-cylinder engines. Perfectly suited for marine applications, this set is compatible with Mercruiser, OMC, Marine Power, Chris Craft, and Volvo Penta engines. Engineered to ensure a tight and reliable seal, it includes all 10 head bolts required for a complete installation. Please note: This set does not include the two end bolts with studs on top. Compatible with 120 HP and 140 HP engines across all years, these bolts are a durable and essential solution for maintaining peak engine performance. Made in the USA and backed by a 1-year warranty. Engine Quest produces high-quality OE-style replacement parts. Each part undergoes rigorous testing and inspections to meet EngineQuest’s exact specifications. Designed for precision manufacturing and durability, our products ensure easy installation. With nearly 500 SKUs available, the company specializes in hard-to-find, in-demand parts, including those no longer available from the OEM, difficult to salvage, or with prohibitively high OEM costs.

• Complete Head Bolt Set: Includes all 10 bolts for GM 2.5L (153 CID) and 3.0L (181 CID) engines.
• Marine Engine Compatibility: Ideal for Mercruiser, OMC, Volvo Penta, Marine Power, and Chris Craft applications.
• High-Performance Fit: Designed for 120 HP, 140 HP, 2.5L, and 3.0L engines across all years.
• Durable Construction: Precision-engineered for secure installation and optimal engine performance.
• Made in the USA: High-quality manufacturing for long-lasting reliability.
• Warranty Included: Backed by a 1-year warranty for peace of mind.
• OEM Interchange: Compatible with casting number 10-34510.
• EngineQuest: Over 75 Years of U.S. Automotive Expertise – Designed in the USA with Top-Quality Control. Proud IMCA/WISSOTA Supporter. Backed by a 1-Year Parts & Labor Warranty.