SKU: 93400203602

Mr. Gasket Ultra-Seal Header Gaskets - 5913

$41.49 $46.10
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  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 12 - Jul 17

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Mr. Gasket Ultra-Seal Header Gaskets - 5913Overview: Manufactured from high temperature steel core graphite faced exhaust material. Expanded steel core provides stability and maximum torque retention to eliminate gasket failure. Graphite facing provides excellent heat resistance and thermal conductivity to transfer heat away from the cylinder head. Conforms to and seals minor surface irregularities. High recovery material allows header or manifold flange to stay sealed if flange loses clamp

Overview:

Manufactured from high-temperature steel core/graphite faced exhaust material. Expanded steel core provides stability and maximum torque retention to eliminate gasket failure. Graphite facing provides excellent heat resistance and thermal conductivity to transfer heat away from the cylinder head. Conforms to and seals minor surface irregularities. High recovery material allows header or manifold flange to stay sealed if flange loses clamp-load. Can be trimmed if necessary for modified port applications. For original equipment replacement, high performance street, drag race and oval track use.

Features:

    Application:

    Year Make Model Submodel Engine Size
    1975 - 1978 GMC C25 454/7.4 V8
    1979 - 1986 GMC C2500 454/7.4 V8
    1975 - 1978 GMC C25 Suburban 454/7.4 V8
    1979 - 1986 GMC C2500 Suburban 454/7.4 V8
    1975 - 1978 GMC C35 454/7.4 V8
    1979 - 1990 GMC C3500 454/7.4 V8
    1975 - 1976 GMC G25 454/7.4 V8
    1976 GMC G35 454/7.4 V8
    1988 - 1990 GMC G3500 454/7.4 V8
    1973 - 1976 GMC Jimmy 454/7.4 V8
    1976 GMC K15 454/7.4 V8
    1980 GMC K1500 454/7.4 V8
    1976 - 1978 GMC K25 454/7.4 V8
    1976 - 1977 GMC K25 Suburban 454/7.4 V8
    1979 - 1990 GMC K3500 454/7.4 V8
    1966 - 1969 Chevrolet Corvette 427/7 V8
    1970 - 1974 Chevrolet Corvette 454/7.4 V8
    1969 Chevrolet El Camino 396/6.5 V8
    1970 - 1975 Chevrolet El Camino 454/7.4 V8
    1970 - 1972 Chevrolet El Camino 402/6.6 V8
    1973 - 1974 Chevrolet G20 Van 454/7.4 V8
    1973 - 1974 Chevrolet G30 Van 454/7.4 V8
    1963 - 1969 Chevrolet Impala 427/7 V8
    1973 - 1986 Chevrolet C20 Suburban 454/7.4 V8
    1968 - 1969 Chevrolet C30 Pickup 396/6.5 V8
    1973 - 1974 Chevrolet C30 Pickup 454/7.4 V8
    1968 - 1969 Chevrolet Camaro 396/6.5 V8
    1970 - 1972 Chevrolet Camaro 402/6.6 V8
    1966 - 1969 Chevrolet Caprice 427/7 V8
    1968 - 1969 Chevrolet Caprice 396/6.5 V8
    1970 - 1976 Chevrolet Caprice 454/7.4 V8
    1971 - 1972 Chevrolet Caprice 402/6.6 V8
    1968 - 1970 Chevrolet Chevelle 396/6.5 V8
    1974 Chevrolet K10 Pickup 454/7.4 V8
    1968 - 1969 Chevrolet K20 Pickup 396/6.5 V8
    1973 - 1974 Chevrolet K20 Pickup 454/7.4 V8
    1968 - 1969 Chevrolet K30 Pickup 396/6.5 V8
    1973 - 1974 Chevrolet K30 Pickup 454/7.4 V8
    1970 - 1972 Chevrolet Kingswood 454/7.4 V8
    1973 - 1975 Chevrolet Laguna 454/7.4 V8
    1971 - 1972 Chevrolet Kingswood 402/6.6 V8
    1973 - 1975 Chevrolet Malibu 454/7.4 V8
    1970 - 1975 Chevrolet Monte Carlo 454/7.4 V8
    1970 - 1972 Chevrolet Monte Carlo 402/6.6 V8
    1969 - 1970 Chevrolet Nova 396/6.5 V8
    1970 Chevrolet Nova 402/6.6 V8
    1970 - 1972 Chevrolet Townsman 454/7.4 V8
    1972 Chevrolet Townsman 402/6.6 V8
    1970 - 1972 GMC C15/C1500 Pickup 402/6.6 V8
    1973 - 1974 GMC C15/C1500 Pickup 454/7.4 V8
    1968 - 1969 GMC C15/C1500 Pickup 396/6.5 V8
    1970 - 1972 GMC C15/C1500 Suburban 402/6.6 V8
    1968 GMC K15/K1500 Suburban 396/6.5 V8
    1970 - 1972 GMC K15/K1500 Suburban 402/6.6 V8
    1973 - 1974 GMC C15/C1500 Suburban 454/7.4 V8
    1968 - 1969 GMC C15/C1500 Suburban 396/6.5 V8
    1970 - 1972 GMC C25/C2500 Pickup 402/6.6 V8
    1968 - 1969 GMC C25/C2500 Pickup 396/6.5 V8
    1973 - 1974 GMC C25/C2500 Pickup 454/7.4 V8
    1970 - 1972 GMC C25/C2500 Suburban 402/6.6 V8
    1968 - 1969 GMC C25/C2500 Suburban 396/6.5 V8
    1974 GMC C25/C2500 Suburban 454/7.4 V8
    1970 - 1972 GMC C35/C3500 Pickup 402/6.6 V8
    1968 - 1969 GMC C35/C3500 Pickup 396/6.5 V8
    1973 - 1974 GMC C35/C3500 Pickup 454/7.4 V8
    1968 - 1969 GMC K15/K1500 Pickup 396/6.5 V8
    1970 - 1975 Chevrolet Bel Air 454/7.4 V8
    1976 - 1978 Chevrolet K5 Blazer 454/7.4 V8
    1975 - 1980 Chevrolet C10 454/7.4 V8
    1973 - 1980 Chevrolet C10 Suburban 454/7.4 V8
    1990 Chevrolet C1500 454/7.4 V8
    1975 - 1986 Chevrolet C20 454/7.4 V8
    1975 - 1986 Chevrolet C30 454/7.4 V8
    1988 - 1990 Chevrolet C3500 454/7.4 V8
    1987 - 1989 GMC R2500 454/7.4 V8
    1987 - 1990 GMC R2500 Suburban 454/7.4 V8
    1987 - 1990 GMC R3500 454/7.4 V8
    1974 GMC K15/K1500 Suburban 454/7.4 V8
    1968 - 1969 GMC K25/K2500 Pickup 396/6.5 V8
    1973 - 1974 GMC K25/K2500 Pickup 454/7.4 V8
    1968 GMC K25/K2500 Suburban 396/6.5 V8
    1974 GMC K25/K2500 Suburban 454/7.4 V8
    1970 - 1971 GMC K35/K3500 Pickup 402/6.6 V8
    1968 - 1969 GMC K35/K3500 Pickup 396/6.5 V8
    1973 - 1974 GMC K35/K3500 Pickup 454/7.4 V8
    1971 - 1975 GMC Sprint 454/7.4 V8
    1971 - 1975 GMC Sprint 402/6.6 V8
    1970 - 1973 Chevrolet Chevelle 454/7.4 V8
    1970 - 1972 Chevrolet Chevelle 402/6.6 V8
    1976 Chevrolet G20 454/7.4 V8
    1975 - 1990 Chevrolet G30 454/7.4 V8
    1970 - 1976 Chevrolet Impala 454/7.4 V8
    1976 - 1980 Chevrolet K10 454/7.4 V8
    1976 - 1978 Chevrolet K20 454/7.4 V8
    1977 - 1986 Chevrolet K30 454/7.4 V8
    1988 - 1990 Chevrolet K3500 454/7.4 V8
    1987 - 1988 Chevrolet R20 454/7.4 V8
    1987 - 1988 Chevrolet R20 Suburban 454/7.4 V8
    1989 Chevrolet R2500 454/7.4 V8
    1989 - 1990 Chevrolet R2500 Suburban 454/7.4 V8
    1987 - 1988 Chevrolet R30 454/7.4 V8
    1989 - 1990 Chevrolet R3500 454/7.4 V8
    1987 - 1988 Chevrolet V30 454/7.4 V8
    1989 - 1990 Chevrolet V3500 454/7.4 V8
    1975 - 1978 GMC C15 454/7.4 V8
    1979 - 1980 GMC C1500 454/7.4 V8
    1975 - 1978 GMC C15 Suburban 454/7.4 V8
    1979 - 1980 GMC C1500 Suburban 454/7.4 V8
    1987 - 1990 GMC V3500 454/7.4 V8
    1963 - 1969 Chevrolet Bel Air 427/7 V8
    1968 - 1969 Chevrolet Bel Air 396/6.5 V8
    1971 - 1972 Chevrolet Bel Air 402/6.6 V8
    1963 - 1969 Chevrolet Biscayne 427/7 V8
    1968 - 1969 Chevrolet Biscayne 396/6.5 V8
    1971 - 1972 Chevrolet Biscayne 402/6.6 V8
    1971 - 1972 Chevrolet Biscayne 454/7.4 V8
    1973 Chevrolet Blazer 454/7.4 V8
    1972 Chevrolet Brookwood 402/6.6 V8
    1968 - 1969 Chevrolet C10 Pickup 396/6.5 V8
    1973 - 1974 Chevrolet C10 Pickup 454/7.4 V8
    1968 - 1969 Chevrolet C10 Suburban 396/6.5 V8
    1968 - 1969 Chevrolet C20 Pickup 396/6.5 V8
    1973 - 1974 Chevrolet C20 Pickup 454/7.4 V8
    1968 - 1969 Chevrolet C20 Suburban 396/6.5 V8
    1968 Chevrolet Chevy II 396/6.5 V8
    1968 - 1969 Chevrolet Impala 396/6.5 V8
    1971 - 1972 Chevrolet Impala 402/6.6 V8
    1968 - 1969 Chevrolet K10 Pickup 396/6.5 V8
    1968 - 1969 Chevrolet K10 Suburban 396/6.5 V8

    Specs:

    Brand Mr. Gasket
    Collector Gaskets Included No
    Emission Code 5
    Engine Chevrolet Big Block Mark IV
    Gasket Line Ultra-Seal
    Material Ultra-seal
    Port Shape Square
    Port Size 2.09" x 2.09"
    Product Type Header Gaskets
    Thickness .062"
    Warning California Proposition 65
    Warranty Limited 90 Day Warranty
    Weight 0.44
    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: 93400203602

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    4.9 ★★★★★
    Based on 2000 reviews
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    Product Reviews
    C
    Verified Purchase
    C
    Phoenix, US
    ★★★★★ 5
    My puppies favorite bone to chew
    I’ve bought at least a half a dozen of puppy bones for my doggie to try, the majority being from Nylabone, and the others from hartz. Her first bone was a pink puppy Nylabone xsmall sise. She definitely must have liked that one but unfortunately I felt like I had to take it away from her too soon, she was teething more then, but even so, thought it was unsafe when I saw little pieces come off and her trying to chew them. I really like these the best, though I don’t think I’ll be ordering any more at least not until she finishes her new ones. I don’t know what flavor she likes more, it might even be a color thing, but I think she prefers the orange ones which are peanut butter flavored. These are really ideal for toy breeds. My pup is still growing, she’s almost 7 months now, but unsure when she will stop growing, for reference she is a chocolate sable yorkiepoo, not sure of how much she weighs right now, but would estimate she weighs around 5.5-6 pounds. These are perfect for her, and I feel like they out live the other ones I’ve gotten, or she just has more interest in them. I bought a second package on subscribe and save (or possibly on my first and forgot I had a new order and didn’t return), but didn’t open the new package until recently as I felt the first pack were starting to look a bit knawed off, but in the middle there was still plenty of chew left. Oddly, she has prefered the old orange one vs the brand new orange one despite them being the exact same toy and flavor. I think she just hasn’t broken it in yet and I overloaded her with too many toys! I also got them for a great price, for some reason I noticed that the price increased nearly double of what I paid, and now they habe decreased a bit but still are about $2 more than what I paid. She loves all toys, and has many plush kinds. She still teeths, so when she is extra hyper and such, I feel like the bone helps occupy her for a moment. All in all I’d reccomend these out of any puppy bones to chew for toy breeds!
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on April 2, 2022
    J
    Verified Purchase
    J CASSIN
    Lake Worth, US
    ★★★★★ 4
    Nice chew toy
    Puppy likes but for me to hold so she can chew is a little difficult.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on May 8, 2026
    A
    Verified Purchase
    Amazon Customer
    Houston, US
    ★★★★★ 5
    Love nylabones
    Nylabbones did it again. The pugs love these. They're so cute and tiny. Perfect for their lithe selves. They're still safe and soft and very chewable.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on November 16, 2025
    A
    Verified Purchase
    Anoni Miss
    Alexandria, US
    ★★★★★ 3
    Not safe, easily chewed bits off
    Mixed feelings. My puppies love them and love to chew on them but also chewed the edges off pretty quickly. I had to take away the first one after only a couple days of intermittent chew so it’s really not durable or long lasting. I don’t feel this is safe for a 12 week old puppy which is super small and can be a choking hazard.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on October 6, 2025
    P
    Verified Purchase
    Pooh
    Port Orchard, US
    ★★★★★ 5
    Very Small
    These are tiny! Just perfect for my little dogs but one was lost within the first few minutes so I had to order another. I'm not so sure how safe it is for the fur children to chew on non-edible, non-digestible plastics but they seem to really like them.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on September 28, 2025

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