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
4.2 ★★★★★
Based on 2070 reviews
Sort
Product Reviews
★★★★★ 5
Mock T-shirt
Size: Large, Color: White
Fit really well, liked the material.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 21, 2026
★★★★★ 3
Loose fitting neck, not snug.
Size: XX-Large, Color: Dark Blue
I am 6’4” weigh @ 230 lbs and ordered a 2XL. My dress shirt neck size is 17 inches. If you’re happy with a very loose fitting around your neck, then you’ll be ok with this mock turtleneck shirt. I ordered thinking it would be a snug fit around the neck size, not hanging down @ one inch or more in the front.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 30, 2025
★★★★★ 5
Great for warm weather
Size: Large, Color: Dark Grey
Love these!! I was having a tough time (living in phoenix) and wearing a blazer. It is so hot here that you dont want to wear thick button up shirts with collars etc. T shirts are a bit informal. These are a great mix. Lightweight and breathable, but still a little more dressy than a t shirt. Look good with out the jacket as well. Great for church or nice night out.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 29, 2026
★★★★★ 1
Fit
Size: XX-Large, Color: Black
These shirts are very soft and comfortable but the mock fits very lose and sloppy
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 15, 2026
★★★★★ 5
Mock shirt for everyday wear.
Color: Gray Green, Lotus Pink, Sky Blue, Size: X-Large
Love how soft the fabric is and wears very well. Very happy with purchase and have bought other colors as well.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 22, 2026