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- USA
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Ships within 48 hours · Estimated delivery Jul 13 - Jul 18
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Description
Header Gaskets-Alum-Layered-396-454 Chevrolet Big Block Mark IV 1965-90 99153FLTOverview: FLOWTECH REAL SEAL header and collector gaskets are a revolutionary break through in exhaust sealing technology. Constructed of separate layers of "Dead Soft" aluminum, REAL SEALS provide a do it once solution that will not burn or blow out. REAL SEAL gaskets will work when an o ringed gasket won't because the "Dead Soft" aluminum conforms to create a leak proof seal. REAL SEALS can also be easily trimmed for port matching and you can use
Overview:
FLOWTECH REAL-SEAL header and collector gaskets are a revolutionary break-through in exhaust sealing technology. Constructed of separate layers of "Dead Soft" aluminum, REAL SEALS provide a do-it-once solution that will not burn or blow out. REAL-SEAL gaskets will work when an o-ringed gasket won't because the "Dead Soft" aluminum conforms to create a leak-proof seal. REAL-SEALS can also be easily trimmed for port-matching and
you can use them over and over again.
Features:
- Multi -Layer "Dead Soft" aluminum conforms to create a leak-proof seal.Water/Weather Resistant
- Re-Useable
- Will Not Burn Or Blow Out
- Suitable For Port-Matching
- Made In USA
Application:
- 1968-1986 Chevrolet C20 Suburban
- 1975-1990 Chevrolet G30
- 1968-1980 Chevrolet C10 Suburban
- 1975-1986 Chevrolet C30
- 1975-1986 Chevrolet C20
- 1979-1990 GMC C3500
- 1979-1990 GMC K3500
- 1966-1976 Chevrolet Impala
- 1966-1976 Chevrolet Caprice
- 1977-1986 Chevrolet K30
- 1966-1975 Chevrolet Bel Air
- 1966-1974 Chevrolet Corvette
- 1966-1973 Chevrolet Chevelle
- 1979-1986 GMC C2500
- 1979-1986 GMC C2500 Suburban
- 1969-1975 Chevrolet El Camino
- 1968-1974 Chevrolet K10 Pickup
- 1968-1974 Chevrolet K20 Pickup
- 1968-1974 Chevrolet K30 Pickup
- 1968-1974 GMC C15/C1500 Pickup
- 1968-1974 GMC C15/C1500 Suburban
- 1968-1974 GMC C25/C2500 Pickup
- 1968-1974 GMC C25/C2500 Suburban
- 1968-1974 GMC C35/C3500 Pickup
- 1968-1974 GMC K15/K1500 Suburban
- 1968-1974 GMC K25/K2500 Pickup
- 1968-1974 GMC K25/K2500 Suburban
- 1968-1974 GMC K35/K3500 Pickup
- 1966-1972 Chevrolet Biscayne
- 1968-1974 Chevrolet C10 Pickup
- 1968-1974 Chevrolet C20 Pickup
- 1968-1974 Chevrolet C30 Pickup
- 1970-1975 Chevrolet Monte Carlo
- 1975-1980 Chevrolet C10
- 1976-1980 Chevrolet K10
- 1968-1972 Chevrolet Camaro
- 1968-1972 Chevrolet K10 Suburban
- 1971-1975 GMC Sprint
- 1973-1976 GMC Jimmy
- 1975-1978 GMC C15
- 1975-1978 GMC C15 Suburban
- 1975-1978 GMC C25
- 1975-1978 GMC C25 Suburban
- 1975-1978 GMC C35
- 1987-1990 GMC R2500 Suburban
- 1987-1990 GMC R3500
- 1987-1990 GMC V3500
- 1976-1978 Chevrolet K20
- 1988-1990 Chevrolet K3500
- 1973-1975 Chevrolet Laguna
- 1973-1975 Chevrolet Malibu
- 1970-1972 Chevrolet Kingswood
- 1970-1972 Chevrolet Townsman
- 1988-1990 Chevrolet C3500
- 1976-1978 Chevrolet K5 Blazer
- 1988-1990 GMC G3500
- 1976-1978 GMC K25
- 1987-1989 GMC R2500
- 1973-1974 Chevrolet G20 Van
- 1973-1974 Chevrolet G30 Van
- 1969-1970 Chevrolet Nova
- 1968-1969 GMC K15/K1500 Pickup
- 1987-1988 Chevrolet R20
- 1987-1988 Chevrolet R20 Suburban
- 1989-1990 Chevrolet R2500 Suburban
- 1987-1988 Chevrolet R30
- 1989-1990 Chevrolet R3500
- 1987-1988 Chevrolet V30
- 1989-1990 Chevrolet V3500
- 1979-1980 GMC C1500
- 1979-1980 GMC C1500 Suburban
- 1975-1976 GMC G25
- 1976-1977 GMC K25 Suburban
- 1973 Chevrolet Blazer
- 1972 Chevrolet Brookwood
- 1976 Chevrolet G20
- 1968 Chevrolet Chevy II
- 1990 Chevrolet C1500
- 1989 Chevrolet R2500
- 1976 GMC G35
- 1976 GMC K15
- 1980 GMC K1500
Specs:
| Brand | Flowtech |
|---|---|
| Collector Gaskets Included | No |
| Emission Code | 5 |
| Engine | Big Block Chevy |
| Gasket Line | MLS |
| Material | Aluminum |
| Port Shape | Round |
| Port Size | 2.15" |
| Product Type | Header Gaskets |
| Thickness | .125" |
| Type of Component | Exhaust Gaskets |
| Warning | California Proposition 65 |
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
4.4 ★★★★★
Based on 620 reviews
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Product Reviews
★★★★★ 5
Great value for the price, highly recommend
Color: Dogwood & Calming, Size: Medium
Our dog loves these and chews them down to nothing. They are a great value for the money and the use your dog gets out of them. The size is just right for our doberdor.
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Reviewed in the United States on May 20, 2026
★★★★★ 3
Our dog loves it but it wasn’t durable enough to last
Color: Dogwood Jack, Size: Large, Color: Dogwood Jack, Size: Large
Our lab took to it as soon as we gave it to her. Perfect size for our 80 lb yellow lab.
However, now that it’s in about 10 days, she’s able to break off chunks from this bone that are dime size or larger, and we have to throw it away
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Reviewed in the United States on May 1, 2026
★★★★★ 5
No problems after a year and a half
Color: Dogwood & Calming, Size: Medium
Have been regularly buying these for my corgi for about a year and a half. The 2 pack lasts about a month or 2 each time. Pieces break off in small enough pieces that they safely pass through his digestive system. He gnaws each one down to about 1/4 the original size before we take it away and give him a new one. He continues to have regular bowel movements and has a healthy appetite so I can’t imagine any problems arising after so long.
I have tried other alternatives and every other similar chew breaks off in larger pieces and didn’t feel comfortable letting him chew/eat them. I noticed there are a few 1 star reviews saying their dogs got sick off these but after a year and a half I have had 0 issues with this product. I guess it depends on the dog and how big of pieces they are swallowing. My dog ingests pieces about the size of a grain of rice so just pay attention and you should be fine.
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Reviewed in the United States on February 18, 2026
★★★★★ 5
Long lasting and safer alternative to sticks
Color: Dogwood & Calming, Size: Medium
These are great, very durable, and have lasted a very long time. Much safer for my dogs than the random sticks they find in the yard. They do get shorter with chewing eventually, but they don't break off in little chunks like I've seen with some nylon chews, and they don't splinter like wood. Medium size works well for both my 16 lb Cavalier and my 60 lb Pyrenees/Golden mix. They're both moderate-to-aggressive chewers, though size obviously affects how much damage they can do.
I wish you could buy the hemp chew separately because that one is very much a favorite in my house, so after 2 years and 2 purchases, I have barely any left of the remaining hemp chew, but still 2 of the dogwood chews that neither dog is as interested in anymore. I'd love to buy a couple more of just the hemp one.
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Reviewed in the United States on April 30, 2026
★★★★★ 5
Your dog will thank you.
Color: Dogwood & Fresh Breath, Size: Large
My dogs loves to chew on these. They make a small mess but not as bad as other chews. They are food for keeping teeth clean.
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Reviewed in the United States on May 31, 2026