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Edelbrock 5821 Sure Seat Valve SpringValve Spring Sure Seat Valve Spring Sure Seat Valve Spring; Non-Rotator; Seat Press. 145 lbs.; Installed H 1.90 in.; Open Press. 345 lbs. at 0.600 in.; OD 1.540 in.; ID 0.760 in.; Coil Bind 1.130 in.; SPECIFICATIONS:
FEATURES:
The Edelbrock #5821 replacement hydraulic roller Sure Seat Valve Spring for Edelbrock cylinder heads are made of highest quality spring wire and precision wound to close tolerances. When you design and sell the best-engineered performance products in the world you have to have a rigorous testing program. Why? Without adequate testing there's no way to stand behind your product with confidence. That's why every product we design and sell at Edelbrock is tested and approved by Edelbrock engineers in a real world environment on state-of-the-art equipment. Our three Super Flow computerized engine dynos are capable of measuring 11 separate engine variables up to speeds of 12 000 rpm. For 2007 we added a new Super Flow SF902 engine dyno. It's fully automated and programmable to simulate various driving situations and is equipped with WinDyn software for the very latest in testing equipment. For real-world tuning there's our Super Flow model SF-840 eddy-current chassis dyno that can handle up to 1 000 hp at the wheels and speeds of 200 mph. When all testing is completed the results evaluated and the part has passed all performance criteria then and only then is the product deemed ready for production. These precise testing procedures are applied to the entire Edelbrock line for performance that's guaranteed. Edelbrock test vehicles are driven by Edelbrock engineers and employees to get a "real world" feeling for the performance improvements. Our products are also tested and used by professional race car teams and drivers. Working with these talented individuals is just another extension of our research and development process so when we say "proven performance" we really mean it! Top racing teams in all forms of motorsports rely on Edelbrock to produce parts that they can count on to win races and championships. Further underscoring our commitment to the racing community Edelbrock is the only aftermarket intake manifold manufacturer licensed by NASCAR. Fits what vehicles: 1957-1975 Chevrolet Bel Air, 1957-1982 Chevrolet Corvette, 1957-1958 Chevrolet Del Ray, 1957-1961 Chevrolet Nomad, 1957 Chevrolet One-Fifty Series, 1957-1958 Chevrolet Sedan Delivery, 1957-1958 Chevrolet Truck, 1957 Chevrolet Two-Ten Series, 1957-1959 GMC 100, 1957-1959 GMC 150, 1957-1959 GMC 250, 1957-1959 GMC 300, 1957-1959 GMC 350-8, 1957-1959 GMC 370, 1957-1959 GMC PM151, 1957-1959 GMC PM152, 1957 GMC PM153, 1957-1960 GMC Truck, 1957-1969 Pontiac Laurentian, 1957-1958 Pontiac Pathfinder, 1958-1972 Chevrolet Biscayne, 1958-1961 Chevrolet Brookwood, 1984-1991 Chevrolet Corvette, 1958-1985 Chevrolet Impala, 1960 Chevrolet Truck, 1958 Chevrolet Yeoman, 1958-1959 GMC F350, 1958-1959 GMC F370, 1958-1959 GMC FM340, 1958-1959 GMC FM350, 1958-1959 GMC M300, 1958-1959 GMC PM150, 1959 GMC PM153, 1958-1959 GMC PM250, 1958-1959 GMC PM251, 1958 GMC PM252, 1958 GMC PM253, 1958-1959 GMC S300, 1958-1959 GMC S370, 1958-1970 Pontiac Strato-Chief, 1959 Chevrolet 3B, 1959 Chevrolet 3C, 1959 Chevrolet 3D, 1959 Chevrolet 3E, 1959 Chevrolet 3F, 1959 Chevrolet 3G, 1959-1960 Chevrolet El Camino, 1959-1961 Chevrolet Kingswood, 1959-1961 Chevrolet Parkwood, 1972-1974 Pontiac Laurentian, 1959-1970 Pontiac Parisienne, 1960-1974 Chevrolet C10 Pickup, 1960-1974 Chevrolet C20 Pickup, 1960-1974 Chevrolet C30 Pickup, 1960-1962 Chevrolet C40, 1960-1974 Chevrolet K10 Pickup, 1960-1974 Chevrolet K20 Pickup, 1960-1966 Chevrolet Suburban, 1960-1963 GMC 1000 Series, 1960-1963 GMC 1500 Series, 1960-1963 GMC 2500 Series, 1960-1966 GMC 3000, 1960-1966 GMC 3500, 1960-1965 GMC Suburban, 1976-1981 Pontiac Laurentian, 1972-1974 Pontiac Parisienne, 1981 Chevrolet Bel Air, 1964-1987 Chevrolet El Camino, 1977-1986 Pontiac Parisienne, 1963-1968 Chevrolet Chevy II, 1963 Ford 300, 1963-1969 Ford Country Sedan, 1963-1972 Ford Country Squire, 1963-1970 Ford Fairlane, 1963-1967 Ford Galaxie, 1963-1972 Ford Galaxie 500, 1963-1972 Ford Ranch Wagon, 1964-1973 Chevrolet Chevelle, 1964-1967 Chevrolet Malibu, 1971-1972 Ford Country Sedan, 1964-1972 Ford Custom 500, 1964-1970 Ford Falcon, 1964-1973 Ford Mustang, 1964-1967 Gordon-Keeble GK1, 1964-1967 Gordon-Keeble IT, 1964-1969 Mercury Comet, 1964-1967 Mercury Villager, 1964-1971 Pontiac Acadian, 1964-1969 Pontiac Beaumont, 1965-1967 Avanti II, 1965-1982 Checker Marathon, 1969-1972 Chevrolet Brookwood, 1965-1972 Ford Custom, 1965 Ford Falcon Sedan Delivery, 1965-1972 Ford LTD, 1965-1974 Ford Ranchero, 1971-1977 Mercury Comet, 1969-1971 Avanti II, 1966-1974 Checker Aerobus, 1966-1993 Chevrolet Caprice, 1969-1972 Chevrolet Kingswood, 1966-1977 Ford Bronco, 1966-1967 Mercury Voyager, 1973-1974 Avanti II, 1967-1986 Chevrolet C10 Suburban, 1967-1986 Chevrolet C20 Suburban, 1967-1992 Chevrolet Camaro, 1967-1974 Chevrolet G20 Van, 1967-1986 Chevrolet K10 Suburban, 1967 Chevrolet K20 Panel, 1967-1986 Chevrolet K20 Suburban, 1977-1979 Ford Ranchero, 1967-1974 GMC C15/C1500 Pickup, 1967-1974 GMC C15/C1500 Suburban, 1967-1974 GMC C25/C2500 Pickup, 1967-1974 GMC C25/C2500 Suburban, 1967-1974 GMC C35/C3500 Pickup, 1967-1974 GMC G15/G1500 Van, 1967-1974 GMC G25/G2500 Van, 1967-1974 GMC K15/K1500 Pickup, 1967-1974 GMC K15/K1500 Suburban, 1967-1974 GMC K25/K2500 Pickup, 1967-1974 GMC K25/K2500 Suburban, 1967 Mercury Commuter, 1967-1968 Mercury Cougar, 1976-1980 Avanti II, 1968-1974 Chevrolet G10 Van, 1968-1974 Chevrolet K30 Pickup, 1980-1981 Ford Bronco, 1968-1974 Ford Torino, 1968-1974 GMC K35/K3500 Pickup, 1968-1974 Mercury Montego, 1969-1970 Checker Deluxe, 1969-1974 Checker Taxicab, 1969-1974 Chevrolet Blazer, 1969-1970 Chevrolet Estate, 1973-1983 Chevrolet Malibu, 1969-1979 Chevrolet Nova, 1969-1972 Chevrolet Townsman, 1969-1975 Ford E-100 Econoline, 1969-1974 Ford E-200 Econoline, 1969-1974 Ford E-300 Econoline, 1969-1981 Ford F-100, 1977-1981 Ford LTD, 1979 Ford Mustang, 1970-1988 Chevrolet Monte Carlo, 1970-1974 GMC G35/G3500 Van, 1970-1991 GMC Jimmy, 1970-1971 Stutz Blackhawk, 1971-1977 Ford Maverick, 1971-1977 GMC Sprint, 1971-1973 Pontiac Ventura, 1979-1981 Ford E-100 Econoline, 1972-1974 Ford F-250, 1972-1978 Ford F-350, 1972-1974 Ford Gran Torino, 1972 Pontiac Bonneville, 1972 Pontiac Firebird, 1972 Pontiac Grand Safari, 1972 Pontiac Grandville, 1973-1976 Chevrolet Laguna, 1980 Ford F-350, 1974 Chevrolet G30 Van, 1977-1978 Ford F-250, 1975 Pontiac Bonneville, 1975 Pontiac Grandville, 1977 Pontiac Ventura, 1975-1986 Chevrolet C10, 1975-1986 Chevrolet C20, 1975-1986 Chevrolet C30, 1975-1995 Chevrolet G10, 1975-1995 Chevrolet G20, 1975-1995 Chevrolet G30, 1975-1986 Chevrolet K10, 1975-1986 Chevrolet K20, 1975-1986 Chevrolet K5 Blazer, 1975-1979 Chevrolet Monza, 1975 Ford E-150 Econoline, 1975 Ford E-250 Econoline, 1975 Ford E-350 Econoline, 1975-1981 Ford F-150, 1980-1981 Ford F-250, 1975-1980 Ford Granada, 1975-1978 Ford Mustang II, 1975-1978 GMC C15, 1975-1978 GMC C15 Suburban, 1975-1978 GMC C25, 1975-1978 GMC C25 Suburban, 1975-1978 GMC C35, 1975-1978 GMC G15, 1975-1978 GMC G25, 1975-1978 GMC G35, 1975-1978 GMC K15, 1975-1978 GMC K15 Suburban, 1975-1978 GMC K25, 1975-1978 GMC K25 Suburban, 1977-1981 Mercury Cougar, 1975-1980 Mercury Monarch, 1975 Oldsmobile Custom Cruiser, 1975 Oldsmobile Delta 88, 1975 Pontiac Catalina, 1975 Pontiac Grand Am, 1975 Pontiac Grand LeMans, 1975-1976 Pontiac Grand Prix, 1975 Pontiac LeMans, 1977 Oldsmobile Custom Cruiser, 1977 Oldsmobile Delta 88, 1977-1992 Pontiac Firebird, 1977-1983 Pontiac Grand LeMans, 1978-1987 Pontiac Grand Prix, 1977-1981 Pontiac LeMans, 1977-1981 Buick Century, 1977-1987 Buick Regal, 1977-1979 Buick Skylark, 1977-1986 Chevrolet K30, 1977-1979 Ford LTD II, 1977-1981 Ford Thunderbird, 1977-1978 GMC K35, 1977-1980 Lincoln Versailles, 1977-1979 Oldsmobile Omega, 1977-1979 Oldsmobile Starfire, 1978-1980 Pontiac Grand Am, 1977-1979 Pontiac Phoenix, 1978 Buick LeSabre, 1979-1981 Ford E-150 Econoline, 1979-1981 Ford E-250 Econoline, 1979-1981 Ford E-350 Econoline, 1978-1979 Ford Fairmont, 1978-1987 GMC Caballero, 1978-1981 Oldsmobile Cutlass, 1978-1980 Oldsmobile Cutlass Calais, 1978-1980 Oldsmobile Cutlass Salon, 1978-1980 Oldsmobile Cutlass Supreme, 1978-1979 Pontiac Sunbird, 1979-1981 Ford E-100 Econoline Club Wagon, 1979-1981 Ford E-150 Econoline Club Wagon, 1979-1980 Ford E-250 Econoline Club Wagon, 1979-1980 Ford E-350 Econoline Club Wagon, 1979-1986 GMC C1500, 1979-1986 GMC C1500 Suburban, 1979-1986 GMC C2500, 1979-1986 GMC C2500 Suburban, 1979-1986 GMC C3500, 1979-1995 GMC G1500, 1979-1995 GMC G2500, 1979-1995 GMC G3500, 1979-1986 GMC K1500, 1979-1986 GMC K1500 Suburban, 1979-1986 GMC K2500, 1979-1986 GMC K2500 Suburban, 1979-1986 GMC K3500, 1979 Mercury Capri, 1979-1981 Mercury Grand Marquis, 1979-1981 Mercury Marquis, 1982 Oldsmobile Cutlass Calais, 1982 Oldsmobile Cutlass Supreme, 1981-1982 Oldsmobile Delta 88, 1980-1981 Pontiac Catalina, 1988-1995 GMC C1500, 1988-1995 GMC C2500, 1988-1995 GMC C3500, 1988-1995 GMC K1500, 1988-1995 GMC K2500, 1988-1995 GMC K3500, 1980 Lincoln Continental, 1980-1981 Lincoln Mark VI, 1980 Oldsmobile Cutlass Cruiser, 1982 Buick LeSabre, 1987-1994 Chevrolet Blazer, 1981 Lincoln Town Car, 1982 Oldsmobile Cutlass Cruiser, 1983-1986 Pontiac Bonneville, 1992-1995 GMC C1500 Suburban, 1992-1995 GMC C2500 Suburban, 1992-1995 GMC K1500 Suburban, 1992-1995 GMC K2500 Suburban, 1986-1989 Excalibur Phaeton, 1987 Chevrolet R10, 1987-1988 Chevrolet R10 Suburban, 1987-1988 Chevrolet R20, 1987-1988 Chevrolet R20 Suburban, 1987-1988 Chevrolet R30, 1987 Chevrolet V10, 1987-1988 Chevrolet V10 Suburban, 1987 Chevrolet V20, 1987-1988 Chevrolet V20 Suburban, 1987-1988 Chevrolet V30, 1987 GMC R1500, 1987-1991 GMC R1500 Suburban, 1987-1989 GMC R2500, 1987-1991 GMC R2500 Suburban, 1987-1991 GMC R3500, 1987 GMC V1500, 1987-1991 GMC V1500 Suburban, 1987 GMC V2500, 1987-1991 GMC V2500 Suburban, 1987-1991 GMC V3500, 1988-1995 Chevrolet C1500, 1988-1995 Chevrolet C2500, 1988-1995 Chevrolet C3500, 1988-1995 Chevrolet K1500, 1988-1995 Chevrolet K2500, 1988-1995 Chevrolet K3500, 1989-1991 Chevrolet R1500 Suburban, 1989-1991 Chevrolet R2500 Suburban, 1989-1991 Chevrolet R3500, 1989-1991 Chevrolet V1500 Suburban, 1989-1991 Chevrolet V2500 Suburban, 1989-1991 Chevrolet V3500, 1991-1992 Oldsmobile Custom Cruiser, 1990-1992 Cadillac Brougham, 1991-1993 Buick Commercial Chassis, 1991-1993 Buick Roadmaster, 1991-1993 Chevrolet Commercial Chassis, 1992-1995 Cadillac Commercial Chassis, 1992-1995 Chevrolet C1500 Suburban, 1992-1995 Chevrolet C2500 Suburban, 1992-1995 Chevrolet K1500 Suburban, 1992-1995 Chevrolet K2500 Suburban, 1992-1995 GMC Yukon, 1993-1995 Cadillac Fleetwood, 1993 Excalibur Limited, 1995 Chevrolet Tahoe |
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| We carry performance and replacement parts, along with every consumer item you’ll ever need. Take advantage of our huge distribution network in the United States and Canada, we're able to ship direct to you, so we can get your order into your hands faster than the competition. Our goal is to exceed your expectations. And we’ve built a system to do just that. |  |
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Our company combines hard-core drag racers and auto enthusiasts with tech-savvy engineers and developers — all car lovers — to create a webstore that gives you an unmatched shopping experience — and we deliver it fast. Very fast. Unlike traditional brick-and-mortar retail outlets, our inventory isn’t limited to what we can pack into a storefront or what a counter clerk may be able to find. While they can only offer you hundreds of items, you’re just a few clicks away from millions of parts when you shop PartsHawk — all in stock and ready to ship. And since we don’t own any of those expensive stores, we can offer our parts for less, and that saves you money on every part, every day. A better shopping experience, for every product for every car, whenever you order. |
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SHIPPING POLICY
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RETURN POLICY PartsHawk stands behind every item we sell. Occasionally, there may be an issue with your item or your order and we will do our best to ensure you are 100% satisfied. We offer a 30 day exchange or refund policy on all orders. Within 30 days or receipt of your order you may request a return for either an exchange or a refund. All product returns must be in the original packaging, have not been used, installed or damaged due to improper installation. All parts, hardware, documents and instructions must be included in the returns. PartsHawk will also support the manufacture’s warranty for all item during the warranty period offered by the manufacturer. |
| Carriers and Ship Methods: We ship most packages to the contiguous 48 states using USPS, UPS or FedEx. Upon shipping we determine the closest distribution center to you and the quickest method. | Note: We do not accept returns for Car Computers, Performance tuners or Vehicle Programmers. If the product is defective we will exchange the unit for the exact item. No new returns on these products. |
| Large Parcel Items: For large items (bumpers, side steps, bed covers, etc.), these may be shipped through a truck delivery service. If you are having issues tracking your package please contact us so we can assist you. |
Return Check List
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| GLOBAL SHIPPING PROGRAM
How does shipping work? Placing an order outside the US is easy! In fact, eBay handles the entire transaction for you once we have shipped the product to their warehouse in Kentucky. Once the order has shipped you will receive a tracking number from our warehouse to Kentucky and then another tracking number from Kentucky to you. Additional Charges and Fees Additional shipping, duties and taxes will be calculated by eBay during check out. |
Outside the US? Don't worry, PartsHawk is currently shipping to over 100 countries
Check the Shipping and Payments section above to see if this item can be shipped to you. |
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| What if my order shows shipped but the package is not moving?
At times there is a delay in the carrier’s tracking for updates. Please allow up to 24 hours for your tracking to update. If you still do not see any movement, please contact our Customer Service Department and we will be happy to assist. |
What if I am not available when the carrier tries to deliver?
If there is no response when the package arrives, the driver may leave the package nearest to the street or make a second delivery attempt on the next business day. Please check your tracking info as it will let you know the next steps for delivery attempt. |
How can I get a copy of my receipt or invoice?
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What if the tracking number is not working after 24 hours? Depending on the size of your item, it could be shipped with a truck carrier and will require you to be present at time of delivery. Please feel free to reach out to us and we will provide additional details. |
I have special delivery instructions (i.e. Leave by back door, leave with neighbor, place in the planter on the left of my garage, etc.) We recommend leaving a note for the carrier on the door nearest to the street as we do not have a way to communicate those requests for you. |
Why did my item ship from a different location?
Many parts are stocked in more than one warehouse location. As a result your order may ship from a location other than the location shown in the listing. In most cases the shipping location will be closer to delivery address as we always try to ship from the closest warehouse to minimize transit times. In some circumstances intraday sales and other inventory changes may result in your item being shipped from a location further from your delivery address. |
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Do I have to be there to sign for my package? If your order is over $250 there is a possibility it was shipped with a signature required option. The easiest way to check is to locate the tracking number for your order and open on the carrier’s website. There is no additional cost to you for this service. |
Can I pickup my part/order from your warehouse? Sorry, we do not offer the pickup in warehouse option as our warehouses do not have public access |
How do I know if this part will fit my vehicle? Check the vehicle compatibility guide above or just reach out to us. Updated 10.19.2023 |
