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Quicksilver 8M0120862 Valve Spring Kit for 357 CT Circle Track Iron Heads

Manufacturer

Quicksilver

<h3>About Quicksilver</h3><p><strong>Quicksilver</strong> has been a cornerstone of the marine industry since 1950, delivering the parts, accessories, and engine care products that keep boats running at their best. A division of Brunswick Corporation and closely aligned with Mercury Marine, Quicksilver has grown into one of the most trusted names on the water — offering more than 40,000 parts across a broad range of product lines designed for both the weekend boater and the seasoned marine professional.</p><p>What sets Quicksilver apart is its unique position as the premier supplier of Mercury Marine Original Equipment replacement parts, while simultaneously serving owners of nearly every major marine engine brand. Whether your vessel is powered by Mercury, Mariner, Honda, Yamaha, Evinrude/Johnson, or Suzuki, Quicksilver produces components engineered to fit and perform like the originals. This cross-brand compatibility, combined with factory-level quality standards, is why boaters worldwide have made Quicksilver their go-to source for maintenance and repair.</p><p>The Quicksilver catalog spans the full spectrum of marine maintenance needs. At its core are <a href="/7456-quicksilver-fuel-pump-6244">fuel pumps</a> and complete fuel pump and carburetor kit solutions that keep fuel delivery systems operating reliably under demanding on-water conditions. For those needing a broader fuel system overhaul, Quicksilver&apos;s lineup of <a href="/7456-quicksilver-fuel-pumps-201310">fuel pumps</a> covers outboard and sterndrive applications alike. Above the waterline, few components are as performance-critical as the prop, and Quicksilver&apos;s extensive range of <a href="/200673-propellers-quicksilver-7456">propellers</a> — from aluminum to stainless steel — gives boaters the ability to tune their vessel&apos;s performance to their exact needs. Rounding out the drivetrain, Quicksilver also offers precision-engineered <a href="/7456-quicksilver-drives-gearcases-transoms-200346">drives, gearcases, and transom components</a> that are essential for maintaining the mechanical heart of sterndrive and inboard systems.</p><p>Quicksilver products undergo rigorous testing and engineering validation — the result of decades of R&amp;D conducted alongside Mercury Marine&apos;s own engineering teams. The brand&apos;s commitment to quality means that each part meets or exceeds OEM specifications, giving do-it-yourself boaters and marine technicians alike the confidence that a Quicksilver repair will hold up season after season. From freshwater lakes to demanding saltwater environments, Quicksilver is built for wherever your adventures take you.</p>

Part Number

8M0120862
09/15/2036 3:44 AM
Sale Price

$835.01

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Product Details

The Quicksilver 8M0120862 Valve Spring Kit is the OEM-specified replacement valvetrain component for the Quicksilver 357 CT Circle Track crate engine equipped with cast iron cylinder heads. This kit features beehive-style valve springs engineered to match the original factory valvetrain assembly, ensuring proper spring pressure, harmonics control, and reliable high-RPM performance consistent with the engine's design parameters.

Key Features:

  • Direct OEM replacement valve spring kit for the Quicksilver 357 CT Circle Track crate engine
  • Beehive valve spring design for improved valvetrain stability and reduced spring surge at higher RPM
  • Maintains compliance with factory-sealed engine specifications required for circle track sanctioning bodies
  • Engineered to work with the engine's cast iron cylinder heads and existing valvetrain geometry
  • Restores original spring rates and installed heights per factory specifications

Designed as a like-for-like replacement, this valve spring kit allows racers and engine builders to service the valvetrain of the 357 CT crate engine while preserving its factory-sealed performance status. Using the correct OEM part ensures the engine remains within sanctioning body compliance requirements.

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