Product images and videos are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Beginner — under 30 min
Overview
Constructed from alloy steel, these gaskets offer excellent resilience, high-temperature endurance, and resistance to corrosion. They feature an elastomer coating and a reinforced steel core for increased tensile strength, allowing them to conform to warped flanges for a superior seal without deteriorating. These gaskets do not require re-torquing.
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Part #: 5991
Mr. Gasket Ultra-Seal Engine Overhaul Kits are designed for maximum sealing of bi-metal (cast iron block/aluminum cylinder head) engines, but work equally well on all iron or all aluminum varieties. Kits include Ultra-Seal cylinder head, intake, exhaust, valve cover and oil pan gaskets and Mr Gasket Performance timing cover, fuel pump, thermostat, water pump, and rear main seals. For original equipment replacement, high-performance street, drag or oval track racing.
Features:
- Designed for maximum sealing of bi-metal (cast iron block/aluminum cylinder head) engines
- Ultra-Seal cylinder head, intake, exhaust, valve cover and oil pan gaskets
- Mr Gasket timing cover, fuel pump, thermostat, water pump, and rear main seals
- For OE replacement, high performance street, drag race and oval track use
Fits 1958-1985 Chevrolet 283-350 Gen I Small Block
Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Fitment
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Specifications
| Brand | Mr. Gasket |
| Part Number | M00S 5991 |
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About MOTORMIA
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Returns & Fitment
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.
Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.
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