SKU: 29593230697

Mr. Gasket Ultra-Seal Header Gaskets - 5921

$41.48 $46.09
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Ships within 48 hours · Estimated delivery Aug 10 - Aug 15

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Description

Mr. Gasket Ultra-Seal Header Gaskets - 5921Overview: 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
    1967 - 1978 Pontiac Bonneville 400/6.6 V8
    1967 Pontiac Catalina 428/7 V8
    1965 - 1969 Pontiac Catalina
    1970 - 1978 Pontiac Catalina 400/6.6 V8
    1970 - 1976 Pontiac Catalina 455/7.5 V8
    1965 - 1970 Pontiac Bonneville
    1966 Pontiac Bonneville 421/6.9 V8
    1971 - 1976 Pontiac Bonneville 455/7.5 V8
    1967 Pontiac Firebird 326/5.3 V8
    1968 - 1977 Pontiac Firebird 350/5.7 V8
    1971 - 1976 Pontiac Firebird 455/7.5 V8
    1970 - 1977 Pontiac Catalina 350/5.7 V8
    1968 - 1979 Pontiac Firebird 400/6.6 V8
    1977 Pontiac Bonneville 350/5.7 V8
    1973 - 1975 Pontiac Grand Am 400/6.6 V8
    1965 - 1970 Pontiac Grand Prix
    1966 Pontiac Grand Prix 389/6.4 V8
    1967 - 1977 Pontiac Grand Prix 400/6.6 V8
    1967 Pontiac Grand Prix 428/7 V8
    1971 - 1976 Pontiac Grand Prix 455/7.5 V8
    1971 - 1978 Pontiac Grand Safari 400/6.6 V8
    1971 - 1976 Pontiac Grand Safari 455/7.5 V8
    1973 - 1975 Pontiac Grand Am 455/7.5 V8
    1973 - 1975 Pontiac Grand Am 350/5.7 V8
    1972 - 1975 Pontiac Grandville 455/7.5 V8
    1973 - 1975 Pontiac Grandville 400/6.6 V8
    1965 - 1970 Pontiac GTO
    1966 Pontiac Grand Prix 421/6.9 V8
    1971 - 1973 Pontiac GTO 400/6.6 V8
    1971 - 1973 Pontiac GTO 455/7.5 V8
    1965 - 1967 Pontiac LeMans 326/5.3 V8
    1968 - 1977 Pontiac LeMans 350/5.7 V8
    1968 - 1977 Pontiac LeMans 400/6.6 V8
    1970 - 1976 Pontiac LeMans 455/7.5 V8
    1971 Pontiac Grandville
    1966 Pontiac Star Chief 389/6.4 V8
    1965 Pontiac Star Chief
    1966 Pontiac Star Chief 421/6.9 V8
    1972 - 1976 Pontiac Ventura 350/5.7 V8
    1965 - 1967 Pontiac Tempest 326/5.3 V8
    1967 Pontiac Executive
    1968 - 1970 Pontiac Executive 400/6.6 V8
    1968 - 1970 Pontiac Tempest 350/5.7 V8
    1968 - 1969 Pontiac Executive 428/7 V8
    1968 - 1970 Pontiac Tempest 400/6.6 V8
    1970 Pontiac Executive 455/7.5 V8
    1975 - 1977 Pontiac Grand LeMans 350/5.7 V8
    1975 - 1976 Pontiac Grand LeMans 455/7.5 V8
    1975 - 1977 Pontiac Grand LeMans 400/6.6 V8
    1976 - 1977 Pontiac Grand Prix 350/5.7 V8
    1966 Pontiac Bonneville 389/6.4 V8
    1967 Pontiac Bonneville 428/7 V8

    Specs:

    Brand Mr. Gasket
    Collector Gaskets Included No
    Emission Code 5
    Engine Pontiac V8
    Gasket Line Ultra-Seal
    Material Ultra-seal
    Port Shape Oval / D
    Port Size 1.46" x 1.93"
    Product Type Header Gaskets
    Thickness .062"
    Warning California Proposition 65
    Warranty Limited 90 Day Warranty
    Weight 0.38
    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: 29593230697

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    4.7 ★★★★★
    Based on 16 reviews
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    Product Reviews
    M
    Verified Purchase
    Maria B.Porter
    Louisville, US
    ★★★★★ 5
    Lifesaver while recovering from rotator cuff surgery
    This pillow was a lifesaver, it’s sturdy yet comfortable and can be used many different ways! Great price and size too! I like that when I opened it, there was no smell! If you’re looking for a wedge pillow, this one will do the job!!
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on March 10, 2026
    M
    Verified Purchase
    Mary M.
    Birmingham, US
    ★★★★★ 4
    It is a great wedge pillow, but takes time to get used to sleeping on your back
    Color: Dark Grey & White, Size: Adjustable 9&12 Inch + 1 Head Pillow
    I bought this for post-surgery, I had to sleep on my back. Nearly impossible as a lifelong side sleeper. It is memory foam, and it does seem to run hot. But after a couple of weeks, I'm adjusting to it. Back sleeping is best for saving your face from AM wrinkles and mascara smears all over pillows. (Yes I know, I should take off mascara before bed, but....). Now that I've adjusted to sleeping with it, it stays on my bed and I wake up without the creases on my face and neck! So if you are buying pre-surgery, buy in advance to adjust to a new style of sleeping! I'm keeping it!
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on November 7, 2025
    A
    Verified Purchase
    Allison
    Bozeman, US
    ★★★★★ 5
    Its worth the purchase!
    Color: Black, Size: Adjustable 9&12 Inch + 1 Head Pillow
    Bought this pillow because Im dealing with both GERD and neck pain so I decided to order this and hope for the best thats being said Im so glad I did because its helped me a lot with both issues. Some extra comments: Its a little firm but not in a bad way and the head rest is comfy but I do wish I could bring it down lower.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on June 3, 2026
    M
    Verified Purchase
    Mrs Collins (& occasionally Hubs)
    Alexandria, US
    ★★★★★ 3
    Misleading: Pillow Itself Has Only TWO Configurations!! >:(
    Color: Black, Size: Adjustable 9&12 Inch + 1 Head Pillow
    I was sold on the 10-Option bit until I realized there are only 2 choices as far as flooping and flopping the pillow itself. It is 2 triangles, a large one and a small one. The large triangle IS THE SAME ANGLE ON EACH END. The small triangle IS ATTACHED TO THE CENTER OF THE LARGE TRIANGLE. That means no matter how you move the pillow itself, you're getting the EXACT SAME THING. Where YOU come in is where all these infinity "versatility" options are - whether you put it upright or whether you put it flat. That's it. All this I can read in bed! I can play on my laptop! I can watch TV! Yeah that's upright. Option 1. And all this I can put it under my legs! I can use it as a normal pillow as well! That's flat. Option 2. There is absolutely nothing special or different about this thing except the stupid pocket. Had they not made the triangle the same angles on the end, had they made a steep angle and a low angle and that center pillow detachable but still velcro - THEN there would have been more elevation options. But this, I was highly disappointed. It's like saying, My bed has 360 options! (because I can lay 360 different degrees around the bed) AND 360 MORE BECAUSE GUESS WHAT! I CAN LAY ON MY STOMACH 360 DIFFERENT DEGREES around the bed! Oh! And on my side 360 degree different ways! Wait I have a left and a right side - the OTHER side I can lay on it around the bed 360 different degrees as well! And sitting cross-legged on the bed 360 different degree directions as well! So. No. It's a firm memory foam pillow. You lay upright or lay down or you put it under your legs or on your lap. It changes 2 ways and you make it work 4 ways. That's it. Yes it smells but not too bad, not foul, just persistently. Like a light chemical smell but it didn't aggravate me (I get scent, etc. migraines). It self-inflated pretty fast. But as you can tell, I was not impressed with it in reality. :(
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on May 3, 2026
    T
    Verified Purchase
    TM Conway
    Dallas, US
    ★★★★★ 5
    Helps my coughing
    4.8 stars. This helps keep me sleeping at a good angle to prevent night coughing. Also, it's great for relaxing and watching tv in bed. I find that it is Goldilocks level firm - just enough to be supportive but soft enough for comfort. I wish I'd gotten the roll pillow now :-( It's hard to make my bed look "made" with this on it - no matter what color I get. I keep it on the side & out if sight til I need it. I do like the material & thankfully it's removable for cleaning, but I can tell it's going to wear with a lot, so I do wish it were easier to find more covers for it so I could have one on while washing one. Overall, I like this a lot. The only thing negative is that I can see that it will "pill" & fuzz up in places with more use. I do use this every night. One warning: As with any products like this that are suctioned close for packaging - be VERY careful. I always hold one corner of the plastic to open a little vent before I cut more to remove the pillow and let it "fluff". It would be easy to snip some of the fabric...
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on October 3, 2025

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