UMI Performance 90058 Heavy-Duty Engine Mounts
UMI Performance 90058 Heavy-Duty Engine Mounts
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FAST & FREE
SHIPPING -
30-DAY
RETURNS -
SECURE
PAYMENT -
EXCELLENT
SERVICE
Description
- Buy now and get same day shipping!
- Hurry up! Tomorrow the price will be higher!
- 3/16” thick pickled mild steel plate
- CNC laser cut for exact tolerances
- Grade 8 mounting hardware included
- Gloss black powder coat finish
- Made In USA
- Fitment: 1978-1988 GM G-Body
- Direct Bolt-On: Yes
- Manufacturer: UMI Performance Inc.
- Finish: Black Powder Coat
- UOM: Set
Specifications:
- We do our best to ship most items same or next day.
- For all products, free fast delivery of the UPS is already included in the price.
- Unfortunately UPS doesn’t accept PO box address. Please specify physical address which will guarantee faster delivery.
- All orders must be paid via PayPal.
- You may use your paypal dollars, or use your MC/Visa, Amex, Discover thru your PayPal account.
- We offer 30 Day return policy.
- Buyer pays return shipping.
- Returns will only be accepted with a valid RMA number.
- All returns must be in original box unopened.
- A 20% restocking fee may apply.
- All products returned are assumed to be in new and saleable condition unless the customer indicates otherwise at the time of submission. Re-boxing fees will be assessed on items received with damaged packaging. This fee may include shipping or other charges levied by the manufacturer. Any product returned in damaged, used or otherwise unsaleable condition may be returned to the customer or credit given at lower value, at the discretion of Autoshopping24.
- Unfortunately mistakes happen and very seldom we ship faulty items. If you would like to get a replacement for an item purchased from us, we can do it for you! Please ship the original item(s) to our warehouse first and provide us with tracking number(s). Once we see that items are on their way we will send a replacement.
OVERVIEW
1978-1988 GM G-Body SBC Engine Mount Clamshells
The P/N 90058 heavy duty engine mounts for GM G-body cars takes the place of the heavy factory clamshell mount. It places the Small Block Chevy in exact factory location and uses our popular P/N 90051 solid motor mounts or can be used with the factory rubber mounts. Tough 3/16” laser cut brackets and Grade 8 hardware can handle as much horsepower as you can throw at them. When used with P/N 90051, solid engine mounts improve responsiveness and help prevent engine movement, which can help in tight packaging situations (large header primaries, turbos, etc). Solid engine mounts work best in racing applications and may contribute to increased Noise, Vibration and Harshness. Available in gloss black powder coat. These engine mounts are proudly used on UMI’s G-Body test car, 1979 Monte Carlo “Green Machine”. 100% manufactured, tested and raced out of Philipsburg, PA – USA. Note: Heavy duty engine mounts do not work with Oldsmobile or Pontiac engines.
FITMENT
Buick Regal 1978
Buick Regal 1979
Buick Regal 1980
Buick Regal 1981
Buick Regal 1982
Buick Regal 1983
Buick Regal 1984
Buick Regal 1985
Buick Regal 1986
Buick Regal 1987
Chevrolet El Camino 1978
Chevrolet El Camino 1979
Chevrolet El Camino 1980
Chevrolet El Camino 1981
Chevrolet El Camino 1982
Chevrolet El Camino 1983
Chevrolet El Camino 1984
Chevrolet El Camino 1985
Chevrolet El Camino 1986
Chevrolet El Camino 1987
Chevrolet Malibu 1978
Chevrolet Malibu 1979
Chevrolet Malibu 1980
Chevrolet Malibu 1981
Chevrolet Malibu 1982
Chevrolet Malibu 1983
Chevrolet Monte Carlo 1978
Chevrolet Monte Carlo 1979
Chevrolet Monte Carlo 1980
Chevrolet Monte Carlo 1981
Chevrolet Monte Carlo 1982
Chevrolet Monte Carlo 1983
Chevrolet Monte Carlo 1984
Chevrolet Monte Carlo 1985
Chevrolet Monte Carlo 1986
Chevrolet Monte Carlo 1987
Chevrolet Monte Carlo 1988
Pontiac Bonneville 1982
Pontiac Bonneville 1983
Pontiac Bonneville 1984
Pontiac Bonneville 1985
Pontiac Bonneville 1986
Pontiac Grand Prix 1978
Pontiac Grand Prix 1979
Pontiac Grand Prix 1980
Pontiac Grand Prix 1981
Pontiac Grand Prix 1982
Pontiac Grand Prix 1983
Pontiac Grand Prix 1984
Pontiac Grand Prix 1985
Pontiac Grand Prix 1986
Pontiac Grand Prix 1987
NOTES
Heavy duty engine mounts do not work with Oldsmobile or Pontiac engines.
If you have fitment questions or concerns, please contact us prior to ordering.
*Please see the "Compatibility" link at the top of the listing.
Brand: | UMI Performance |
---|---|
Isin: | ITTWYU6CYMWU |

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GUARANTEED SAFE CHECKOUT
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MONEY BACK GUARANTEE
30 days money back guarantee, no additional fee charged.
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EXCELLENT SUPPORT
We provide 24/7 online customer support via email.
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Fast Shipping
One week domestic shipping. Global delivery to the US in 2 weeks.
-
FAST & FREE
SHIPPING -
30-DAY
RETURNS -
SECURE
PAYMENT -
EXCELLENT
SERVICE
Description
- Buy now and get same day shipping!
- Hurry up! Tomorrow the price will be higher!
- 3/16” thick pickled mild steel plate
- CNC laser cut for exact tolerances
- Grade 8 mounting hardware included
- Gloss black powder coat finish
- Made In USA
- Fitment: 1978-1988 GM G-Body
- Direct Bolt-On: Yes
- Manufacturer: UMI Performance Inc.
- Finish: Black Powder Coat
- UOM: Set
Specifications:
- We do our best to ship most items same or next day.
- For all products, free fast delivery of the UPS is already included in the price.
- Unfortunately UPS doesn’t accept PO box address. Please specify physical address which will guarantee faster delivery.
- All orders must be paid via PayPal.
- You may use your paypal dollars, or use your MC/Visa, Amex, Discover thru your PayPal account.
- We offer 30 Day return policy.
- Buyer pays return shipping.
- Returns will only be accepted with a valid RMA number.
- All returns must be in original box unopened.
- A 20% restocking fee may apply.
- All products returned are assumed to be in new and saleable condition unless the customer indicates otherwise at the time of submission. Re-boxing fees will be assessed on items received with damaged packaging. This fee may include shipping or other charges levied by the manufacturer. Any product returned in damaged, used or otherwise unsaleable condition may be returned to the customer or credit given at lower value, at the discretion of Autoshopping24.
- Unfortunately mistakes happen and very seldom we ship faulty items. If you would like to get a replacement for an item purchased from us, we can do it for you! Please ship the original item(s) to our warehouse first and provide us with tracking number(s). Once we see that items are on their way we will send a replacement.
OVERVIEW
1978-1988 GM G-Body SBC Engine Mount Clamshells
The P/N 90058 heavy duty engine mounts for GM G-body cars takes the place of the heavy factory clamshell mount. It places the Small Block Chevy in exact factory location and uses our popular P/N 90051 solid motor mounts or can be used with the factory rubber mounts. Tough 3/16” laser cut brackets and Grade 8 hardware can handle as much horsepower as you can throw at them. When used with P/N 90051, solid engine mounts improve responsiveness and help prevent engine movement, which can help in tight packaging situations (large header primaries, turbos, etc). Solid engine mounts work best in racing applications and may contribute to increased Noise, Vibration and Harshness. Available in gloss black powder coat. These engine mounts are proudly used on UMI’s G-Body test car, 1979 Monte Carlo “Green Machine”. 100% manufactured, tested and raced out of Philipsburg, PA – USA. Note: Heavy duty engine mounts do not work with Oldsmobile or Pontiac engines.
FITMENT
Buick Regal 1978
Buick Regal 1979
Buick Regal 1980
Buick Regal 1981
Buick Regal 1982
Buick Regal 1983
Buick Regal 1984
Buick Regal 1985
Buick Regal 1986
Buick Regal 1987
Chevrolet El Camino 1978
Chevrolet El Camino 1979
Chevrolet El Camino 1980
Chevrolet El Camino 1981
Chevrolet El Camino 1982
Chevrolet El Camino 1983
Chevrolet El Camino 1984
Chevrolet El Camino 1985
Chevrolet El Camino 1986
Chevrolet El Camino 1987
Chevrolet Malibu 1978
Chevrolet Malibu 1979
Chevrolet Malibu 1980
Chevrolet Malibu 1981
Chevrolet Malibu 1982
Chevrolet Malibu 1983
Chevrolet Monte Carlo 1978
Chevrolet Monte Carlo 1979
Chevrolet Monte Carlo 1980
Chevrolet Monte Carlo 1981
Chevrolet Monte Carlo 1982
Chevrolet Monte Carlo 1983
Chevrolet Monte Carlo 1984
Chevrolet Monte Carlo 1985
Chevrolet Monte Carlo 1986
Chevrolet Monte Carlo 1987
Chevrolet Monte Carlo 1988
Pontiac Bonneville 1982
Pontiac Bonneville 1983
Pontiac Bonneville 1984
Pontiac Bonneville 1985
Pontiac Bonneville 1986
Pontiac Grand Prix 1978
Pontiac Grand Prix 1979
Pontiac Grand Prix 1980
Pontiac Grand Prix 1981
Pontiac Grand Prix 1982
Pontiac Grand Prix 1983
Pontiac Grand Prix 1984
Pontiac Grand Prix 1985
Pontiac Grand Prix 1986
Pontiac Grand Prix 1987
NOTES
Heavy duty engine mounts do not work with Oldsmobile or Pontiac engines.
If you have fitment questions or concerns, please contact us prior to ordering.
*Please see the "Compatibility" link at the top of the listing.
- Brand: UMI Performance
- Type: Engine Mount Kit
- Color: Black
- Manufacturer Part Number: 90058
- Material: Steel
- Country/Region of Manufacture: United States
- Finish: Powder Coat
- California Prop 65 Warning: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm.
Processing Time
- We process and ship orders Monday through Friday, excluding holidays.
- Most orders are processed within 1–3 business days, depending on product availability.
- Processing time does not include delivery time, which varies based on your location and the product’s shipping origin.
Shipping Coverage
We currently ship to addresses within the United States only.
Products may ship from:
- Our U.S. warehouses, or
- Our international fulfillment centers (including Korea, Japan, China, Australia, Mexico, Canada, the United Kingdom, and the EU).
Each product page clearly displays the “Ships From” location before checkout.
Shipping Methods & Estimated Delivery
Shipping Method | Estimated Delivery | Cost |
---|---|---|
Free Shipping (US) | 5–10 business days | Free, available on eligible items |
Standard Shipping (US to US by Item) | 5–10 business days | $6.50 for the first item, $3.00 each additional |
Standard Shipping (From US Warehouse by Weight) | 3–7 business days | Starts at $6.50, increasing by $2 for every additional 4 oz (0.25 lb) up to 1 lb, then by $4 for each additional pound beyond 1 lb. |
Extended Delivery (Ships from Overseas Warehouse) | 10–15 business days | $14.50 for the first item, $4.00 each additional |
Shipping costs vary by product weight, quantity and origin. Exact rates and delivery estimates are displayed on each product page and confirmed during checkout.
Free Shipping
We offer free standard shipping on select products or during promotional periods. Availability of free shipping will be displayed on the product page and at checkout.
Carriers
We primarily use USPS and UPS for U.S. deliveries. Items shipped from international warehouses may be handled by partner carriers depending on the country of origin.
Import Duties & Taxes
All import duties and taxes for goods imported into the United States are included in the product price. There are no hidden fees or additional charges at checkout.
Tracking & Notifications
Every order is fully trackable. You will receive a tracking number via email once your order ships. If your order ships in multiple packages, each package will have its own tracking number. If you don’t receive a shipping confirmation immediately, your order is still being processed and will arrive within the estimated timeframe shown at checkout.
You can track your shipment anytime using the Track Your Order page on our website.
Order Changes & Cancellations
If you need to modify or cancel an order, please contact our customer support team as soon as possible. Orders can only be canceled before they ship. Once shipped, cancellations are not possible, but you may request a return after the item is delivered.
Contact: support@ibspot.com
Item Not Received
If your tracking number shows “Delivered” but you haven’t received your package:
- Check with your local USPS or UPS office.
- Confirm that the shipping address provided was correct.
- If the issue remains unresolved, contact support@ibspot.com for assistance.
Damaged or Lost Parcels
If your package arrives damaged or fails to arrive, please contact us immediately. For deliveries to P.O. boxes, ibspot is not responsible for damage caused by weather, temperature, or theft.
Customer Support
For any questions about shipping, tracking, or delivery, our customer support team is here to help.
Email: support@ibspot.com
We’re always happy to help.
Please read our policy carefully before making a purchase.
We aim to ensure every customer has a smooth and transparent experience with ibspot.com.
Order Cancellation Policy
Customers may request to cancel an order before it has been shipped.
Once the package has been shipped, cancellations are no longer possible; however, you may still request a return after receiving your order.
How to Request a Cancellation
You can contact us through:
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Email: support@ibspot.com
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Contact Form: Submit a request through our Contact Us page
Please submit your cancellation request as soon as possible after placing the order to allow us to process it before shipment.
Return Policy
We accept returns for most items within 30 days of delivery for a full refund.
To be eligible for a return:
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The item must be unused, in the same condition as received, and in its original packaging.
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A tracking number must be provided to confirm the return shipment.
Non-Returnable Items
Certain products cannot be returned, including:
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Perishable goods (for example, food, flowers, newspapers, magazines)
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Intimate or sanitary goods
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Hazardous materials or flammable liquids/gases
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Gift cards
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Downloadable software
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Some health and personal care items
Partial Refunds (If Applicable)
Partial refunds may be granted in specific situations, such as:
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Books with obvious signs of use
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Opened CDs, DVDs, software, or vinyl records
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Items not in their original condition, damaged, or missing parts not due to our error
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Items returned more than 30 days after delivery
How to Return an Item
To initiate a return, please contact us at support@ibspot.com with your order number and details about the product you wish to return.
Our team will provide you with return instructions and a prepaid return label.
Shipping Cost for Returns
Please contact us before returning any item.
We will provide a free return shipping label.
If a return is sent back without prior contact or without our provided label, we cannot be held responsible for return shipping costs.
For items valued over $75, we recommend using a trackable shipping service or purchasing shipping insurance.
We cannot guarantee that we will receive your returned item if shipped independently.
Refund Processing
Once your return is received and inspected:
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In-store returns are refunded to the original form of payment or issued as a gift card.
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Mail-in returns using our prepaid label are refunded to the original payment method within 3–5 business days after we receive your return.
Please allow:
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5–7 business days for the return to reach our Returns Center.
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An additional 3–10 business days for your bank to post the refund to your account.
Damages, Issues & Claims
Please inspect your order immediately upon receipt.
If you receive a defective, damaged, or incorrect item, contact us right away at support@ibspot.com.
We’ll evaluate the issue promptly and make it right.
Product Claims
Before purchasing, please review product details carefully.
If there is a problem with your order upon arrival, visit our Support Center or contact us directly to arrange return shipping or replacement.
Exchanges
We do not process direct exchanges.
The fastest way to get what you need is to return the original item and place a new order once your return is accepted.
Return Address
IBSPOT Return Center
15 Sawmill Ln
Dover Plains, NY 12522
United States
Customer Support
Our support team is available 24/7 to assist with cancellations, returns, or general inquiries.
Email: support@ibspot.com
Contact Form: Contact Us page
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