SKU: 63089124612

Mr. Gasket Ultra-Seal Head Gasket - 5788G

$83.56 $92.85
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Ships within 48 hours · Estimated delivery Aug 3 - Aug 8

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Description

Mr. Gasket Ultra-Seal Head Gasket - 5788GOverview: Mr. Gasket Ultra Seal Head Gaskets are a five layer (graphite core perforated steel outer layers) composite construction. The graphite core has excellent thermoconductivity (transfers heat) away from hot spots in head preventing gasket burn out. They provide excellent stability, compressibility and high temperature endurance. A high temperature silicone coating ensures sealing of engine fluids. Compatible with cast iron or aluminum heads,

Overview:

Mr. Gasket Ultra-Seal Head Gaskets are a five layer (graphite core/perforated steel outer layers) composite construction. The graphite core has excellent thermoconductivity (transfers heat) away from hot spots in head preventing gasket burn-out. They provide excellent stability, compressibility and high temperature endurance. A high temperature silicone coating ensures sealing of engine fluids. Compatible with cast iron or aluminum heads, they will not brinell (indent) aluminum cylinder heads. Suitable for high performance street, drag race and oval track use. Sold individually.

Gasket Bore 4.230 inch, Compressed thickness 0.038 inch

Features:

  • Five layer (graphite core/perforated steel outer layers) composite construction
  • Graphite core has excellent thermo-conductivity-transfers heat away from hot spots in head preventing gasket burn-out
  • Provides excellent stability, compressibility and high temperature endurance
  • Coated with high temperature silicone to ensure sealing of engine fluids
  • Will not brinell (indent) aluminum cylinder heads
  • For high performance street, drag race and oval track use

Application:

Year Make Model Submodel Engine Size
1977 Buick Century 350/5.7 V8
1977 Buick Century 403/6.6 V8
1974 - 1976 Buick Electra 455/7.5 V8
1977 - 1979 Buick Electra 403/6.6 V8
1977 - 1980 Buick Electra 350/5.7 V8
1972 - 1975 Buick Electra
1972 - 1976 Buick Estate Wagon
1977 - 1980 Buick Estate Wagon 350/5.7 V8
1977 - 1979 Buick Estate Wagon 403/6.6 V8
1972 - 1976 Buick LeSabre 455/7.5 V8
1977 - 1980 Buick LeSabre 350/5.7 V8
1977 - 1978 Buick LeSabre 403/6.6 V8
1968 - 1980 Oldsmobile Cutlass 350/5.7 V8
1970 - 1976 Oldsmobile Cutlass 455/7.5 V8
1957 - 1966 Oldsmobile Starfire
1968 - 1980 Oldsmobile Delta 88 350/5.7 V8
1968 - 1976 Oldsmobile Delta 88 455/7.5 V8
1957 - 1964 Oldsmobile Super 88
1966 - 1978 Oldsmobile Toronado
1958 - 1966 Oldsmobile Dynamic 88
1964 - 1967 Oldsmobile F85 330/5.4 V8
1965 - 1966 Oldsmobile F85 400/6.6 V8
1968 - 1972 Oldsmobile F85 350/5.7 V8
1971 - 1976 Oldsmobile Cutlass Supreme 455/7.5 V8
1968 - 1980 Oldsmobile Cutlass Supreme 350/5.7 V8
1970 - 1972 Oldsmobile F85 455/7.5 V8
1967 Oldsmobile Delmont 88 330/5.4 V8
1968 Oldsmobile Delmont 88 350/5.7 V8
1965 - 1967 Oldsmobile Delta 88
1957 - 1963 Oldsmobile Fiesta
1959 Oldsmobile Fiesta 371/6.1 V8
1964 - 1966 Oldsmobile Jetstar 88
1973 - 1977 Oldsmobile Omega 350/5.7 V8
1977 Buick Regal 350/5.7 V8
1977 - 1980 Buick Riviera 350/5.7 V8
1977 - 1978 Buick Riviera 403/6.6 V8
1972 - 1976 Buick Riviera
1973 - 1974 Chevrolet Laguna 350/5.7 V8
1973 Chevrolet Malibu 350/5.7 V8
1958 - 1976 Oldsmobile 98
1971 - 1976 Oldsmobile Custom Cruiser
1964 Oldsmobile Cutlass
1965 - 1967 Oldsmobile Cutlass 330/5.4 V8
1965 - 1968 Oldsmobile Cutlass 400/6.6 V8
1972 Pontiac Grand Safari 455/7.5 V8
1977 - 1978 Pontiac Grand Safari 403/6.6 V8
1977 Pontiac Grand Safari 350/5.7 V8
1967 Oldsmobile Cutlass Supreme
1964 - 1965 Oldsmobile Jetstar I
1968 - 1975 Oldsmobile Vista Cruiser 350/5.7 V8
1970 - 1975 Oldsmobile Vista Cruiser 455/7.5 V8
1972 Pontiac Bonneville 455/7.5 V8
1972 Pontiac Catalina 455/7.5 V8
1972 - 1974 Chevrolet Nova 350/5.7 V8
1971 - 1973 GMC Sprint 350/5.7 V8
1971 Jeep Wagoneer 350/5.7 V8
1965 - 1971 Oldsmobile 442
1957 Oldsmobile 88
1977 Pontiac Ventura 350/5.7 V8
1972 - 1973 Buick Centurion 455/7.5 V8
1973 - 1974 Buick Century 455/7.5 V8
1973 - 1974 Buick Estate Wagon 455/7.5 V8
1972 Buick GS 350/5.7 V8
1964 - 1967 Oldsmobile Vista Cruiser
1968 - 1969 Oldsmobile Vista Cruiser 400/6.6 V8
1959 Oldsmobile Dynamic 88 371/6.1 V8
1971 - 1972 Buick GS 455
1974 Buick Riviera 455/7.5 V8
1972 - 1974 Chevrolet Bel Air 350/5.7 V8
1972 - 1974 Chevrolet Camaro 350/5.7 V8
1973 Chevrolet Caprice 350/5.7 V8
1973 Chevrolet Chevelle 350/5.7 V8
1972 Chevrolet Corvette 350/5.7 V8
1973 Chevrolet El Camino 350/5.7 V8
1972 - 1974 Chevrolet Impala 350/5.7 V8
1971 - 1972 Chevrolet K20 Suburban 350/5.7 V8
1977 Buick Skylark 350/5.7 V8
1979 Cadillac Eldorado 350/5.7 V8
1976 - 1977 Cadillac Seville
1978 - 1979 Cadillac Seville 350/5.7 V8
1975 Oldsmobile 98 455/7.5 V8
1977 - 1979 Oldsmobile 98 403/6.6 V8
1977 - 1980 Oldsmobile 98 350/5.7 V8
1975 Oldsmobile Custom Cruiser 455/7.5 V8
1977 - 1980 Oldsmobile Custom Cruiser 350/5.7 V8
1977 - 1979 Oldsmobile Custom Cruiser 403/6.6 V8
1977 Oldsmobile Cutlass 403/6.6 V8
1975 - 1979 Oldsmobile Cutlass Salon 350/5.7 V8
1975 - 1976 Oldsmobile Cutlass Salon 455/7.5 V8
1977 Pontiac Grand Prix 350/5.7 V8
1977 Pontiac Grand Prix 403/6.6 V8
1977 Pontiac LeMans 403/6.6 V8
1977 Pontiac LeMans 350/5.7 V8
1977 Pontiac Phoenix 350/5.7 V8
1977 Oldsmobile Cutlass Salon 403/6.6 V8
1976 Oldsmobile Cutlass Tiara 350/5.7 V8
1976 Oldsmobile Cutlass Tiara 455/7.5 V8
1979 - 1980 Oldsmobile Cutlass Calais 350/5.7 V8
1980 Oldsmobile Cutlass Cruiser 350/5.7 V8
1977 Oldsmobile Cutlass Supreme 403/6.6 V8
1977 - 1979 Oldsmobile Delta 88 403/6.6 V8
1979 - 1980 Oldsmobile Toronado 350/5.7 V8
1977 - 1979 Pontiac Bonneville 403/6.6 V8
1977 - 1980 Pontiac Bonneville 350/5.7 V8
1977 - 1980 Pontiac Catalina 350/5.7 V8
1977 - 1979 Pontiac Catalina 403/6.6 V8
1959 Oldsmobile Super 88 371/6.1 V8
1977 - 1979 Pontiac Firebird 403/6.6 V8
1977 Pontiac Firebird 350/5.7 V8
1977 Pontiac Grand LeMans 350/5.7 V8
1977 Pontiac Grand LeMans 403/6.6 V8
1959 Oldsmobile 98 371/6.1 V8
1967 Oldsmobile Delmont 88 425/7 V8

Specs:

Application Oldsmobile
Brand Mr. Gasket
Compressed Thickness .038 inch
Compression Ratio Up to 14:1
Emission Code 5
Engine Oldsmobile V8
Gasket Bore 4.230 inch
Gasket Line Ultra-Seal
Material Graphite Steel
Packaging Retail
Product Type Head Gasket
Quantity Per Pkg. 1
Warranty Limited 90 Day
Weight 0.5
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 63089124612

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4.1 ★★★★★
Based on 11 reviews
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Product Reviews
A
Amazon Customer
Massapequa, US
★★★★★ 5
Certified quality magnesium citrate
If you like powdered supplements and planning to take magnesium citrate, then this one if for you. I take it towards the end of the day, and in addition to the many benefits of magnesium, it actually helps me relax and sleep better, although those are not the main benefits of citrate. I guess we all react differently to supplements. My favorite setup is when I take it in the evening and sip on it during a sauna session. In all cases, I target end of day. The taste is very good and it mixes easily with water. Also, Thorne is a brand I trust and it's certified by various bodies. It's worth the premium but it's better to catch a deal on amazon or add it to subscribe and save for a discount if you're planning to use it long term.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 3, 2026
T
Tiffani
Port Orchard, US
★★★★★ 5
Best magnesium from the best supplement brand.
Thorne can do no wrong in my book. They just can’t. I take magnesium every night. Usually magnesium glycinate. However, I read that that can start to cause night sweats over overtime. So moving decent was kind of a trial to see if that stopped the issue. It did immediately. The bonus of the powder though is that I can have it in a little bit of cherry juice or a mocktail before I go to bed. The flavor is great, and I haven’t noticed any grittiness whatsoever. That’s sad, I drink a lot of protein drinks so it’s entirely possible. I’m used to grittiness. Since starting to take this, I’ve been sleeping just as well as I have with the magnesium glycinate. Perhaps even a little bit better because this is higher quality and I’m not getting the night sweats.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 24, 2026
S
Samhain
Omaha, US
★★★★★ 4
Simple Magnesium Powder That Is Easy Enough to Take
I just started taking this Magnesium Citrate powder, so it is too early to know if it will help with things like muscle support, heart health, bone health. Magnesium is an important mineral for the body and it plays a role in muscle function, nerve signaling, and overall balance, so I like the idea of adding it to my routine. The citrus berry flavor is not too horrible, which is a pleasant surprise because some magnesium powders can taste pretty rough. This one is easy enough to drink without feeling like you have to force it down. I also like that it is third party certified and comes with a full sixty servings. I will need more time to see if it makes a noticeable difference, but so far the experience has been simple and the taste is manageable.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 14, 2026
I
Inna Tysoe
Belleville, US
★★★★★ 5
2 months supply, tasty berry bubblegum flavor, no morning cramps.
I've been taking Magnesium supplements for a long time, usually in capsule form. Starting from about age 45 I kept getting these awful morning calf cramps. Especially stretching, or on cold morning. The sudden agony was unexpected and concerning. Magnesium is the answer and this water-soluble magnesium from Thorne is no exception. For this particular problem, calf cramps. The results are noticable within a couple of days. If I stop taking magnesium for 3-5 days the cramps come back. Thorne powder has a berry flavor that is very similar to bubble gum. It dissolves easily without leaving any lumps. Is great to help you take your other supplements. I've been taking this for about 3 weeks with no cramps. Price is a little higher than capsules typically are. This works for me and the tub should last two-months if you follow the directions.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 25, 2026
M
Michelle Pepe
New York, US
★★★★★ 5
Easy Way to Add Magnesium Support
Magnesium is one of those supplements many people find helpful as part of their wellness routine. The powder format makes it easy to adjust serving sizes and mix into drinks. One thing I liked was the citrus berry flavor, which made it more pleasant than many unflavored supplements. Overall, a convenient magnesium option from a well-known brand
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 3, 2026

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