Swapping an LS engine into a G-body requires motor mounts that provide correct engine placement, clearance, and vibration isolation. After researching manufacturer specifications, industry standards, and owner feedback, we compared seven top options. Our evaluation focuses on fitment, material quality, and real-world performance to help you choose the right mounts for your build.
| Photo | Product | Score | Buy |
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Holley 120-1022 LS Swap Motor Mounts Best Overall Direct fit for G-body; uses OEM-style rubber bushings |
9.0 | 🛒 Check Price |
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Dirty Dingo Motorsports LS Swap Mounts Best Adjustable Slotted design for 1.5 inches of fore-aft adjustment |
8.7 | 🛒 Check Price |
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BRP Hot Rods LS Swap Motor Mounts Best for High Horsepower Heavy-duty 1/4-inch steel plate construction |
8.4 | 🛒 Check Price |
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Energy Suspension 3.1108G Motor Mounts Best Budget Polyurethane Universal LS swap polyurethane bushings in a pair |
8.1 | 🛒 Check Price |
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Prothane 7-1103-BL Motor Mount Inserts Best Insert Upgrade Blue polyurethane inserts for OEM LS mounts |
7.8 | 🛒 Check Price |
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Schwartz Performance LS Swap Motor Mounts Best Precision Fit CNC-machined billet aluminum with stainless hardware |
8.3 | 🛒 Check Price |
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Hedman Hedders 35110 Motor Mounts Best Value Set Complete set with steel brackets and rubber bushings |
7.3 | 🛒 Check Price |
1. Holley 120-1022 LS Swap Motor Mounts: Best Overall
In our evaluation, the Holley 120-1022 mounts stand out for their precise engineering and straightforward installation. They position the LS engine correctly for optimal driveline angles and clearance. Owner feedback consistently praises the reduction in noise and vibration compared to polyurethane alternatives.
However, these mounts are among the more expensive options. If you are on a tight budget or need maximum adjustability for a heavily modified chassis, you might consider a different set. For most standard LS swaps, these deliver the best balance of performance and comfort.
- Precision CNC-machined steel brackets for exact engine positioning
- Includes high-quality rubber isolators to reduce NVH
- Bolt-in design with no modifications required on most G-body frames
Pros: Excellent fitment and alignment; Reduces vibration well
Cons: Premium price point
2. Dirty Dingo Motorsports LS Swap Mounts: Best Adjustable
Based on our research, Dirty Dingo mounts offer the most adjustability for G-body LS swaps. The slotted design lets you shift the engine forward or backward to optimize weight distribution and driveline angles. Many builders appreciate this flexibility when fitting turbo kits or headers.
The trade-off is increased vibration through the polyurethane bushings. If you prioritize a smooth daily driver ride, these might be too harsh. Also, some users report needing to enlarge bolt holes slightly for perfect alignment. They are best for performance-oriented builds where adjustability is key.
- Laser-cut steel plates with slotted holes for engine positioning
- Includes polyurethane bushings for firm engine retention
- Works with stock and aftermarket crossmembers
Pros: Allows fine-tuning of engine placement; Good value for the features
Cons: Poly bushings transmit more vibration; May require some trimming for perfect fit
3. BRP Hot Rods LS Swap Motor Mounts: Best for High Horsepower
For high-horsepower LS swaps, the BRP Hot Rods mounts offer the strength needed to keep the engine secure. The thick steel plates resist flex during hard launches and high-rpm operation. Owner feedback from track users confirms they hold up well even with forced induction.
However, the stiff poly bushings transmit more engine vibration into the chassis, which may be noticeable during cruising. Some owners also note that the mounts require minor clearancing on certain G-body frames, especially if using aftermarket headers. If you are building a dedicated race car or street/strip machine, these are a solid choice. For a quiet daily driver, look elsewhere.
- Designed to handle over 600 hp with minimal flex
- Uses polyurethane bushings for positive engine location
- Bolt-in design with grade 8 hardware included
Pros: Extremely robust for high-power builds; Stable engine positioning under load
Cons: Higher NVH transmission; Fitment can be tight on some G-body frames
4. Energy Suspension 3.1108G Motor Mounts: Best Budget Polyurethane
Energy Suspension’s 3.1108G bushings are a cost-effective way to upgrade your LS swap mounts to polyurethane. They are compatible with many aftermarket adapter brackets. Our research shows they offer good durability and resistance to engine torque.
However, they are just the bushings; you need to source the metal mounting brackets separately. This can complicate the install if you do not already have a suitable set. Also, the polyurethane increases vibration. These are best for budget-conscious builders who already have adapter plates and want to reduce engine movement.
- Hyper-Flex polyurethane formulation resists oil and wear
- Fits many LS swap adapter plates and crossmembers
- Includes grease for installation
Pros: Affordable upgrade from rubber; Durable polyurethane material
Cons: Requires adapter plates or crossmember (not included); Stiffer ride than rubber
5. Prothane 7-1103-BL Motor Mount Inserts: Best Insert Upgrade
Prothane inserts are designed to replace the rubber in factory LS engine mounts, providing a firmer hold. In our evaluation, they are a simple and inexpensive way to reduce engine rocking during acceleration. They work well for stock or mildly modified LS engines.
However, they are not suitable for custom swap applications where engine position needs to be adjusted. They also transmit more vibration, which can be annoying on long drives. If you have a stock LS mount setup and want a firmer feel without replacing everything, these are a decent choice. For a full swap, you will need dedicated swap mounts.
- Direct replacement for factory rubber inserts
- Reduces engine movement under load
- Simple install with basic hand tools
Pros: Easy upgrade over worn rubber mounts; Low cost
Cons: Not a complete mount solution; Increased NVH; not for daily comfort
6. Schwartz Performance LS Swap Motor Mounts: Best Precision Fit
Schwartz Performance mounts are machined from billet aluminum for a lightweight and precise fit. They use high-quality rubber isolators to keep NVH low. Based on owner feedback, installation is straightforward with the included template, and the mounts position the engine perfectly for most G-body swaps.
The downside is the high cost, which may not be justified for budget builds. Also, there is no adjustability; you get exactly one position. If you want a premium, corrosion-resistant mount that maintains comfort, these are excellent. For maximum adjustability or extreme power levels, consider other options.
- Lightweight billet aluminum construction
- Uses OEM-style rubber isolators for smoothness
- Includes laser-cut template for easy installation
Pros: Lightweight and corrosion-resistant; Smooth ride with rubber isolators
Cons: Expensive for the material; Limited adjustability
7. Hedman Hedders 35110 Motor Mounts: Best Value Set
Hedman Hedders 35110 mounts are a budget-friendly complete set for LS swaps. They include steel brackets and rubber bushings, making them a true bolt-in solution. Our research shows they fit many G-body chassis with minimal fuss, and the rubber isolators keep the ride comfortable.
However, the rubber bushings are not as durable as polyurethane, especially under high horsepower or aggressive driving. Some owners report the rubber compressing over time, leading to engine movement. For mild street builds or daily drivers on a budget, these work well. Avoid them if you plan to track the car or exceed 400 hp.
- Affordable complete mount set for LS swaps
- Rubber isolators for reduced vibration
- Bolt-in design for most G-body frames
Pros: Lowest cost complete kit; Simple bolt-on installation
Cons: Less durable than polyurethane options; Rubber may sag under high torque
Frequently Asked Questions
What are the best LS motor mounts for a G-body daily driver?
For a daily driver, we recommend mounts with rubber isolators to minimize NVH. The Holley 120-1022 or Schwartz Performance mounts are excellent choices because they provide precise fitment and smooth operation.
Do I need to modify my G-body frame for LS swap mounts?
Most aftermarket LS swap mounts for G-body are designed as bolt-in and require no frame modification. However, some high-horsepower or adjustable mounts may need minor clearancing. Always check the manufacturer’s instructions.
Can I use stock LS motor mounts in a G-body swap?
Stock LS mounts are not designed for G-body frames. You need swap-specific brackets that adapt the LS engine to the G-body’s mounting points. The products listed here include those brackets or are compatible with them.
Polyurethane vs. rubber motor mounts: which is better for LS swaps?
Polyurethane mounts reduce engine movement and are more durable, but they transmit more vibration. Rubber mounts offer a quieter ride but may wear faster under high torque. Your choice depends on your performance goals and tolerance for NVH.
How do I know which LS motor mount position is correct for my G-body?
Proper engine placement ensures driveline alignment and clearance for headers and accessories. Adjustable mounts like Dirty Dingo allow you to fine-tune position. For fixed mounts, follow the manufacturer’s specifications; most are designed for stock G-body crossmembers.
Our Verdict
After researching and comparing the top LS motor mounts for G-body swaps, our top pick is the Holley 120-1022 for its precise fit, excellent NVH reduction, and overall quality. For those needing adjustability, the Dirty Dingo Motorsports mounts are a strong runner-up. Choose based on your performance needs and budget.
Last reviewed and spec-checked: June 24, 2026. We re-check our picks and listings periodically.
