Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 10 - Jul 15
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
Mr. Gasket Ultra-Seal Valve Cover Gaskets - 5871Overview: Ultra Seal is Mr. Gasket's premium valve cover gasket material. It's manufactured from a high density cork and rubber blend with a black latex coat applied to the outside to help seal minor flange irregularites and eliminate oil leakage. It creates a positive seal by controlled swelling of the gasket material when exposed to hot oil. For OE replacement, high performance street, drag race and oval track use. Sold as a pair, these gaskets are
Overview:
Ultra-Seal is Mr. Gasket's premium valve cover gasket material. It's manufactured from a high density cork and rubber blend with a black latex coat applied to the outside to help seal minor flange irregularites and eliminate oil leakage. It creates a positive seal by controlled swelling of the gasket material when exposed to hot oil. For OE replacement, high performance street, drag race and oval track use. Sold as a pair, these gaskets are .187" thick.
Features:
Application:
| Year | Make | Model | Submodel | Engine Size |
|---|---|---|---|---|
| 1970 - 1976 | Mercury | Montego | 351/5.8 V8 | |
| 1972 - 1973 | Mercury | Monterey | 351/5.8 V8 | |
| 1971 - 1974 | Mercury | Monterey | 400/6.6 V8 | |
| 1972 - 1976 | Mercury | Montego | 400/6.6 V8 | |
| 1975 - 1976 | Ford | Elite | 400/6.6 V8 | |
| 1975 - 1976 | Ford | Elite | 351/5.8 V8 | |
| 1971 - 1972 | Ford | Custom | 351/5.8 V8 | |
| 1971 - 1972 | Ford | Custom | 400/6.6 V8 | |
| 1971 - 1977 | Ford | Custom 500 | 400/6.6 V8 | |
| 1971 - 1974 | Ford | Country Squire | 351/5.8 V8 | |
| 1971 - 1974 | Ford | Country Squire | 400/6.6 V8 | |
| 1971 - 1977 | Ford | Custom 500 | 351/5.8 V8 | |
| 1970 | Ford | Fairlane | 351/5.8 V8 | |
| 1971 - 1974 | Ford | Galaxie 500 | 400/6.6 V8 | |
| 1970 - 1974 | Ford | Galaxie 500 | 351/5.8 V8 | |
| 1972 - 1976 | Ford | Gran Torino | 351/5.8 V8 | |
| 1972 - 1976 | Ford | Gran Torino | 400/6.6 V8 | |
| 1971 - 1978 | Ford | LTD | 400/6.6 V8 | |
| 1971 - 1978 | Ford | LTD | 351/5.8 V8 | |
| 1970 - 1973 | Ford | Mustang | 351/5.8 V8 | |
| 1970 - 1974 | Ford | Ranch Wagon | 351/5.8 V8 | |
| 1971 - 1974 | Ford | Ranch Wagon | 400/6.6 V8 | |
| 1970 - 1979 | Ford | Ranchero | 351/5.8 V8 | |
| 1972 - 1978 | Ford | Ranchero | 400/6.6 V8 | |
| 1972 - 1978 | Ford | Thunderbird | 400/6.6 V8 | |
| 1970 - 1976 | Ford | Torino | 351/5.8 V8 | |
| 1972 - 1976 | Ford | Torino | 400/6.6 V8 | |
| 1971 - 1974 | Mercury | Colony Park | 400/6.6 V8 | |
| 1972 - 1973 | Mercury | Colony Park | 351/5.8 V8 | |
| 1969 | Mercury | Cougar | 302/5 V8 | |
| 1970 - 1979 | Mercury | Cougar | 351/5.8 V8 | |
| 1973 - 1978 | Mercury | Cougar | 400/6.6 V8 | |
| 1977 - 1978 | Ford | LTD II | 400/6.6 V8 | |
| 1977 - 1979 | Ford | LTD II | 351/5.8 V8 | |
| 1977 - 1979 | Ford | Thunderbird | 351/5.8 V8 | |
| 1977 - 1978 | Lincoln | Continental | 400/6.6 V8 | |
| 1979 | Lincoln | Continental | ||
| 1977 - 1978 | Lincoln | Mark V | 400/6.6 V8 | |
| 1979 | Lincoln | Mark V | ||
| 1978 | Mercury | Grand Marquis | 351/5.8 V8 | |
| 1975 - 1978 | Mercury | Grand Marquis | 400/6.6 V8 | |
| 1971 - 1978 | Mercury | Marquis | 400/6.6 V8 | |
| 1972 - 1978 | Mercury | Marquis | 351/5.8 V8 | |
| 1971 - 1974 | Ford | Country Sedan | 400/6.6 V8 | |
| 1971 - 1974 | Ford | Country Sedan | 351/5.8 V8 | |
| 1970 - 1971 | Mercury | Cyclone | 351/5.8 V8 | |
| 1978 - 1981 | Ford | Bronco | 351/5.8 V8 | |
| 1978 - 1979 | Ford | Bronco | 400/6.6 V8 | |
| 1980 | Ford | E-250 Econoline | 400/6.6 V8 | |
| 1980 - 1981 | Ford | E-250 Econoline | 351/5.8 V8 | |
| 1980 - 1981 | Ford | E-250 Econoline Club Wagon | 351/5.8 V8 | |
| 1980 - 1982 | Ford | E-250 Econoline Club Wagon | 400/6.6 V8 | |
| 1980 - 1981 | Ford | E-350 Econoline | 351/5.8 V8 | |
| 1980 - 1982 | Ford | E-350 Econoline | 400/6.6 V8 | |
| 1980 - 1981 | Ford | E-350 Econoline Club Wagon | 351/5.8 V8 | |
| 1980 - 1982 | Ford | E-350 Econoline Club Wagon | 400/6.6 V8 | |
| 1977 - 1979 | Ford | F-100 | 351/5.8 V8 | |
| 1977 - 1979 | Ford | F-100 | 400/6.6 V8 | |
| 1977 - 1981 | Ford | F-150 | 351/5.8 V8 | |
| 1977 - 1979 | Ford | F-150 | 400/6.6 V8 | |
| 1977 - 1981 | Ford | F-250 | 351/5.8 V8 | |
| 1977 - 1982 | Ford | F-250 | 400/6.6 V8 | |
| 1977 - 1982 | Ford | F-350 | 400/6.6 V8 | |
| 1977 - 1981 | Ford | F-350 | 351/5.8 V8 |
Specs:
| Application | Small Block Ford |
|---|---|
| Brand | Mr. Gasket |
| Emission Code | 5 |
| Engine | Ford Boss 302 |
| Engine | Ford Cleveland |
| Engine | Ford Modified |
| Packaging | Retail - Skin Pack |
| Product Type | Valve Cover Gaskets |
| Valve Cover Gasket Material | Ultra Seal |
| Valve Cover Gasket Thickness | .187" |
| 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:
- 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
4.7 ★★★★★
Based on 1860 reviews
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Product Reviews
★★★★★ 5
Very good product
Size: Medium, Color: (001) Black / Black / Pitch Gray
I purchased these to wear inside lowcut slip on casual shoes, I don't particularly like to not wear socks in my shoes for hygienic reasons. Prior to purchasing these socks, all I could find were those made of very light beige hosiery type material , and my slip on shoes would slide around a bit. These are light weight and breathable athletic type material, with a very good gripper strip at the heel. One pair of my slip on casual shoes have a particularly lower cut in the toe area, but the shoe is black and I chose the black color and though I see a hint of the sock there, it matches and does not detract from the look of the casual solid black shoe
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 15, 2026
★★★★★ 5
They stay out! No more sock wads!
Size: Medium, Color: (100) White / White / Mod Gray
Best no show socks ever made!!!!! I've been struggling for 2 years to find ones that actually stay on your foot, even other national brands, and I just became content wearing my sneakers without socks. They ALWAYS slid down into my show & I ended up walking on a wad of sock until I could fix it...or usually just took them off after a couple of tries. Enter Under Armor!!! They a mid weight, but not very thick & still breathable. They work too by actually staying on your foot! Not once have they slid down into my show!! Very comfortable but they could be a little more affordable.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 1, 2025
★★★★★ 5
Love!
Size: Large, Color: (100) White / White / Mod Gray
Ive tried so many no show socks but I love these. This is the 3rd set I've bought. They never slip off and the material is thin and breathable. Perfect for working out.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 2, 2026
★★★★★ 5
True no-show socks that don’t slide down!
Size: Medium, Color: (100) White / White / Mod Gray, Size: Medium, Color: (100) White / White / Mod Gray
This is the first pair of no-show socks I’ve tried that actually don’t slide down into my shoes. Trust me… I have tried lots of different pairs and this is the one! They fit perfectly. They’re not too thick and they’re obviously durable because I wash them after each wear, so daily.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 21, 2026
★★★★★ 4
Great fit but expensive
Size: Medium, Color: (252) Blush Beige / White / Castlerock
These are really great socks. I love them, but they are definitely pricey.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 30, 2026
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