YHB solid motor mount combo for SBC/BBC provides stable engine mounting and reduced movement.
YHB solid chassis pads with precise dimensions replace factory mounts for classic Chevys.
YHB Chevy small-block fitment covers 1958-1972 GM engines and select late models compatibility.
YHB frame mount kit installation shows alignment for a secure connection.
YHB performance engine mounts enhance torque transfer and engine stability in custom builds.
YHB solid motor mount combo for SBC/BBC provides stable engine mounting and reduced movement.
YHB solid chassis pads with precise dimensions replace factory mounts for classic Chevys.
YHB Chevy small-block fitment covers 1958-1972 GM engines and select late models compatibility.
YHB frame mount kit installation shows alignment for a secure connection.
YHB performance engine mounts enhance torque transfer and engine stability in custom builds.

YHB Solid Motor Mount Combo for Chevy SBC & BBC – Frame Mount Kit (GM 3990914 Replaces)

Upgrade the reliability and control of your small‑block Chevy with YHB's Solid Motor Mount Combo. Crafted from...
Vendor: YHB
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YHB solid motor mount combo for SBC/BBC provides stable engine mounting and reduced movement.

YHB Solid Motor Mount Combo for Chevy SBC & BBC – Frame Mount Kit (GM 3990914 Replaces)

£62.32
YHB solid motor mount combo for SBC/BBC provides stable engine mounting and reduced movement.
YHB solid chassis pads with precise dimensions replace factory mounts for classic Chevys.
YHB Chevy small-block fitment covers 1958-1972 GM engines and select late models compatibility.
YHB frame mount kit installation shows alignment for a secure connection.
YHB performance engine mounts enhance torque transfer and engine stability in custom builds.

YHB Solid Motor Mount Combo for Chevy SBC & BBC – Frame Mount Kit (GM 3990914 Replaces)

£62.32
Description
Description
x

Upgrade the reliability and control of your small‑block Chevy with YHB's Solid Motor Mount Combo. Crafted from solid steel, these mounts replace the stock rubber units to reduce engine movement during aggressive driving, street sessions, or custom builds. In high‑torque scenarios, solid mounts help preserve linkage alignment and improve overall response, making your ride feel more predictable without overpromising results. Whether you’re building a rat rod or a hot street machine, this kit offers a sturdy, no‑nonsense mounting foundation.

What’s included

  • 2 solid motor mounts (steel construction)
  • 2 solid steel chassis pads
  • Direct replacement for GM OEM part #3990914

Key benefits

  • Reduces engine movement and potential torque loss in high‑performance setups
  • Solid steel design withstands demanding use in custom builds
  • Simple upgrade path for classic GM small‑block platforms
  • Enhances engine stability and linkage consistency in tough driving conditions

Fitment & specs

  • Replaces GM OEM part #3990914
  • Motor mounts: center distance 2-5/16" x 5-1/16", center height 2", frame surface to hole center 1", sleeve width 2-3/8"
  • Chassis pads: center distance 2-5/16" x 5-1/16", center height 2", frame-to-hole distance 1", sleeve width 2-3/8"
  • Compatible models include 1974-1981 Camaro & Firebird (307/350), 1973-1988 Chevelle/Malibu/Monte Carlo/El Camino (307‑454), 1973-1979 Nova (307/350), and 1976-1990 Impala/Caprice (307/350)

Real‑world use cases

  • Rat rods and hot street builds where a solid mounting base supports precise alignment
  • Custom chassis projects needing a sturdy, reliable foundation for performance tuning

Note: This product targets a subset of GM small‑block Chevys and is not a universal replacement. For best results, verify fitment with your engine and frame and follow standard installation practices. The statement above suggests potential improvements in stability and control, not guaranteed outcomes, and depends on overall setup and installation quality.

FAQ

Q: What’s included in the YHB Solid Motor Mount Combo?

A: The kit includes two solid motor mounts and two solid steel chassis pads for SBC/ BBC applications.

Q: What vehicles and years does it fit?

A: Compatibility includes 1958-1981 GM small-block Chevys and models like Camaro, Firebird, Chevelle, Malibu, Monte Carlo, El Camino, Nova, and Caprice.

Shipping & Return
Shipping & Return
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Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

Shipping

We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

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