LowPricedAutoParts Brass Freeze Plug Kit (Expansion/Core Plugs) - Fits Chevrolet GMC Pontiac 366 396 402 427 454 Big Block V8 Engines 1965-1990 (1 3/4" Block Plugs)

Safeguard your classic Chevy big-block V8 from coolant leaks and freeze-related damage with this premium brass freeze plug kit from LowPricedAutoParts – a complete set tailored for Chevrolet, GMC, and Pontiac 6.0L/366, 6.5L/396-402, 7.0L/427, and 7.4L/454 OHV V8 engines (naturally aspirated applications; GAS) from 1965–1990 (with 1 3/4" block plugs noted). This high-quality kit fits legendary models like Bel Air, Blazer, Camaro, Caprice, Chevelle, Corvette, Impala, K5 Blazer, Suburban, and more – essential for engine rebuilds, refreshes, or replacing worn/corroded plugs in these torque-monster big-blocks that powered muscle cars, full-size classics, and heavy-duty trucks with unmatched low-end power and durability. The kit supplies all necessary premium brass freeze plugs (also known as core plugs or expansion plugs) to seal block and head casting holes, including the noted 1 3/4" block plugs, offering superior corrosion resistance over steel for dependable coolant containment and protection against cracking in cold weather or harsh conditions. Matched to the big-block specs (bores from 3.936" to 4.250"), these plugs deliver a precise, OEM-style fit that minimizes leak risks, maintains cooling system pressure, and promotes long-term engine health. Ideal for addressing age-related failures during overhauls – this set helps revive your vehicle's legendary grunt, smooth operation, and classic performance for years of cruising, towing, or show-quality restoration. This is not a universal kit for mismatched engines or severely damaged blocks without inspection – professional measurement of plug holes (including 1 3/4" block plugs), thorough cleaning, and correct installation techniques (with sealants as per GM guidelines) are crucial for a leak-free, distortion-free seal. Always verify hole diameters and drive plugs squarely during assembly. Verify your exact year and application before ordering. LowPricedAutoParts is committed to providing the right parts with reliable customer support—message us your engine details or any fitment questions for fast, expert assistance. We're here to support your rebuild every step of the way. Shop with confidence knowing LowPricedAutoParts delivers quality automotive parts backed by outstanding service.

• Complete brass expansion plug kit for Chevrolet, GMC, and Pontiac 6.0L/366, 6.5L/396-402, 7.0L/427, and 7.4L/454 big block OHV V8 engines (naturally aspirated; GAS) from 1965–1990 – verify year and vehicle (e.g., Bel Air, Blazer, Camaro, Caprice, Chevelle, Corvette, Impala, K5 Blazer, Suburban) for exact match in classic cars, muscle cars, and trucks
• Includes a full set of premium brass freeze plugs (core plugs) for engine block and head sealing – superior corrosion resistance compared to steel; ideal for preventing coolant leaks, protecting against freeze damage, and sealing casting holes (with 1 3/4" block plugs noted) during rebuilds or repairs
• Precision-engineered to OEM specs for the Chevy big block family (plug holes match factory block/head sizes including 1 3/4" block plugs – confirm your specific plug hole diameters before ordering; no additional modifications needed if within spec)
• Premium brass construction delivers excellent long-term durability and secure sealing for vintage muscle cars and trucks – restores coolant system integrity, prevents overheating or block issues, and supports massive torque and classic performance
• Professional installation recommended – clean plug holes thoroughly (including 1 3/4" block plugs), apply appropriate sealant per GM specs if required, and drive plugs in evenly/squarely to avoid distortion; pressure-test for leaks post-assembly to ensure optimal protection and reliability
• Contact LowPricedAutoParts for fitment questions, plug size confirmation (including 1 3/4" block plugs), or compatibility with your 1965–1990 Chevrolet/GMC/Pontiac vehicle; we're here with fast, reliable support every step of the way