UMI Performance LSX Poly Engine Mounts - 2329

The UMI Performance LSX Poly Engine Mounts (Part #2329) are a purpose-built upgrade for 1993–2002 GM F-Body LS swap and LS engine applications, including the Chevrolet Camaro and Pontiac Firebird. Designed and manufactured in the USA using 3/16" steel construction with polyurethane bushings, these mounts occupy the sweet spot between the harshness of solid mounts and the slop of worn factory rubber — making them a go-to choice for street-driven LS-swapped and LS-powered fourth-gen F-Body builds.

Key Features & Benefits

• 3/16" Steel Construction: Heavy-gauge steel fabrication provides lasting strength and resistance to the heat and torque loads common in high-performance LS applications — a direct upgrade over factory rubber mounts that flex and deteriorate over time.
• Polyurethane Bushings: The poly bushing material strikes a balance between performance and street manners. Unlike solid mounts that transmit every vibration directly into the cabin, polyurethane absorbs minor NVH while still controlling engine movement far better than soft OEM rubber — keeping your drivetrain aligned under hard acceleration.
• Bridges the Gap Between Solid and Stock: UMI positions these mounts as the middle ground between their solid engine-side mounts and factory GM mounts, giving drivers a meaningful performance gain without the discomfort typically associated with competition-oriented solid setups.
• Made in the USA: Manufactured domestically by UMI Performance, a brand with a long track record in GM F-Body and A-Body suspension and chassis components.
• Broad Compatibility with UMI's Own Ecosystem: Recommended for use alongside UMI part numbers 2320, 2321, 2330, and factory K-members, as well as UMI's 2406 and 2410 LS swap mounts used in other platforms — simplifying parts selection when you're building out a complete UMI suspension package.
• Direct Fitment for Fourth-Gen F-Bodies: Engineered specifically for 1993–2002 Camaro and Firebird LS applications, eliminating the guesswork and fabrication associated with generic motor mount adapters.

Specifications

• Part Number: 2329 (UMI Performance) / SKU: UMI2329
• Steel Thickness: 3/16"
• Bushing Material: Polyurethane
• Country of Manufacture: USA
• Proposition 65: Yes

Fitment

The UMI Performance 2329 LSX Poly Engine Mounts fit the following vehicles:

• 1993–2002 Chevrolet Camaro (Base)
• 1993 Chevrolet Camaro Indianapolis 500 Pace Car
• 1996–1997 Chevrolet Camaro RS
• 1993–2002 Chevrolet Camaro Z28
• 1998–2002 Chevrolet Camaro Z28 SS
• 1993–2002 Pontiac Firebird (Base)
• 1993–2002 Pontiac Firebird Formula
• 1993–2002 Pontiac Firebird Trans Am
• 1993–2002 Pontiac Firebird Trans Am GT (1994)

These mounts are intended for LS/LSX engine applications in the above fourth-generation F-Body chassis. UMI also notes compatibility with their 2406 and 2410 LS swap mounts used in other platforms when paired appropriately. If you are unsure whether these mounts suit your specific build configuration, contact our fitment team before ordering.

Why Buy from ThreePiece.us

ThreePiece.us offers free shipping on every order, so there are no surprises at checkout on a set of engine mounts like these. Our team has served over 10,000 customers and is available to help verify parts compatibility for your specific build — just call or email before you order if you have fitment questions. Spread your purchase over time with Affirm financing, available at checkout. We stock the UMI 2329 as a regularly stocked product, so you won't be waiting weeks for your parts to arrive.

Frequently Asked Questions

Q: What years and models do the UMI 2329 engine mounts fit?
A: These mounts are designed for 1993–2002 Chevrolet Camaro and 1993–2002 Pontiac Firebird in all trim levels, including the Z28, SS, Trans Am, Formula, and base models. They are intended for LS/LSX engine applications in these fourth-gen F-Body cars.

Q: Are these solid mounts or poly mounts — and does it matter for a street car?
A: These are polyurethane mounts, not solid. UMI specifically designed the 2329 to bridge the gap between their solid engine-side mounts and the factory GM rubber mounts. For a street-driven car, poly mounts offer noticeably tighter engine control than worn OEM rubber while still absorbing enough vibration to remain comfortable on daily drives — a meaningful compromise if you want performance without the harsh NVH of solid mounts.

Q: What other UMI parts are compatible or recommended alongside these mounts?
A: UMI recommends using the 2329 poly engine mounts with their part numbers 2320, 2321, 2330, and factory K-members, as well as UMI's 2406 and 2410 LS swap mounts when used in other platforms. If you're building out a full UMI suspension or swap package, these mounts integrate cleanly into that ecosystem.

Q: Do these require professional installation or can an experienced DIYer tackle them?
A: Community experience from fourth-gen F-Body forums indicates that the driver's side is generally considered the more involved of the two during an engine mount swap. While no installation instructions are included in our product data, this is a mechanical job that a knowledgeable DIYer comfortable with engine bay work should be able to complete with standard tools. If you have specific questions about your setup, reach out to our team or consult UMI's tech support line.