LOSTAR engine motor mounts Pair (2) 3474 — direct-fit Chevy SBC/BBC replacement, heavy-duty OEM-quality

LOSTAR Pair(2) 3474 Engine Motor Mounts are a direct-fit, heavy-duty replacement set engineered to support SBC and BBC Chevy small- and big-block engines (283–454) with OEM-level durability.

These two motor mounts were designed for enthusiasts and mechanics who need a dependable, factory-style replacement for worn or damaged engine mounts on Chevy applications including 283, 305, 327, 350, 383, 400, 396, 427, and 454 engines. Built from quality materials, the mounts meet or exceed OEM standards and come with a one-year unlimited-mileage quality guarantee for added confidence. They install in place of the original parts numbered 3474, offering a straightforward swap without modification for most classic and performance Chevy engines.

Will these mounts fit my Chevy small-block or big-block engine?

Yes—these mounts are manufactured to fit a wide range of Chevrolet small-block and big-block engines. They match the dimensions and mounting points of common OEM 3474 mounts for a direct replacement on compatible models.

• Compatible with 283, 305, 327, 350, 383, 400, 396, 427, 454 engines
• Sold as a pair (2 mounts) for left and right engine support
• Designed to line up with factory bolt holes for easy installation
• Replacement for OEM part number 3474 (two pieces required)

How durable are these LOSTAR motor mounts under street and performance conditions?

Constructed from high-quality materials, the mounts are intended to withstand everyday driving stresses and moderate performance use. The components meet or surpass OEM specifications, offering improved longevity over many worn original mounts.

• Heavy-duty construction resists deformation under load
• Materials selected for vibration dampening and long life
• Manufactured to OEM tolerances to prevent premature wear
• Backed by a 1-year unlimited-mileage quality guarantee

What comes in the package and what should I expect during installation?

The package includes two engine motor mounts—one for each side of the engine. Installation typically requires standard hand tools and lifting support for the engine; many DIYers can complete the swap in a few hours, while shops can perform it quickly during routine maintenance.

• Package contents: 2 x LOSTAR engine motor mounts (part 3474 ×2)
• No extra brackets or adapters for most standard Chevy setups
• Installation tip: support the engine with a jack and use torque specs from your service manual
• Check bolt threads and hardware condition; replace fasteners if corroded

Why choose these aftermarket mounts over used or stock-worn originals?

Replacing aged or damaged mounts with new LOSTAR parts restores proper engine alignment and reduces vibration, noise, and stress on drivetrain components. New mounts prevent issues associated with collapsed or cracked originals and are often a cost-effective performance and safety upgrade for older vehicles.

• Restores correct engine position and reduces cabin vibration
• Prevents transmission misalignment and related wear
• Cost-effective alternative to OEM dealer prices for like-for-like replacement
• One-year warranty gives added assurance for reliability

Who is this for? These LOSTAR 3474 engine motor mounts are aimed at classic Chevy owners, hot-rodders, and mechanics who need a reliable, direct-fit replacement for small- and big-block engines from 283 through 454 cubic inches. If you’re restoring a classic, refreshing worn engine supports, or preparing a performance engine for street duty, these mounts offer OEM-compatible fitment and robust construction to get your drivetrain back to proper alignment.