Skip to product information
1 of 8

Header Gaskets-Alum-Layered-396-454 Chevrolet Big Block Mark IV 1965-90 99153FLT

Header Gaskets-Alum-Layered-396-454 Chevrolet Big Block Mark IV 1965-90 99153FLT

SKU: 99153FLT
Regular price $108.00 CAD
Regular price Sale price $108.00 CAD
Sale Sold out

Buyer is responsible for ALL Import Duties/Taxes/Tariffs.

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

  • 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

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
View full details

Policies and FAQs

Return Policy

We accept returns on products within 30 days of delivery. Return shipping is the responsibility of the buyer unless we, the seller, are at fault.

Fault reasons include but are not limited to:
  • Buyer was shipped the wrong product
  • Buyer was shipped a damaged product
  • The product page had incorrect fitment and the part does not fit the Buyer's vehicle
 
The Buyer will not be refunded outbound shipping unless the Seller (Modern Day Muffler & Brake) is at fault.
 
In cases where the Buyer purchases and ships the return please note that if the Shipper (ex. USPS, FedEx, UPS, etc.) loses the return we will not be able to offer a refund as the Buyer must contact the Shipper and make a claim.
 
All products must be returned in original condition, meaning that the product must not be damaged, installed, or missing pieces/parts. If the product is not in original condition a deduction will be issued of up to 50% of the purchase price of the product.
 
Opened boxes, plastic bags, and other packaging are not considered damage (excluding single use items such as, but not limited to, liquids, software, and other components that cannot be reused/resealed).
 
When we, the seller, are at fault, please Contact Us for a return label, products returned with a shipping label not provided by the seller will not be refunded to the buyer. Please also note that our return labels are issued with the dimensions and weight of the original shipment, if the product is being returned in any box/package besides the original please Contact Us with the dimensions and weight.

Returns must be sent to this address:
Modern Day Muffler & Brake
774 Broad Street
Wadsworth, OH 44281
 
Products returned directly to a manufacturer or the incorrect address may be issued a deduction or denied a refund entirely.
 
If a product was delivered outside the 30 day return window or is no longer in original condition please contact us as we may be able to issue a refund in store credit and/or with a deduction. If this is the case please Contact Us as these situations are handled on a case by case basis.
 
If there are any questions, concerns, or doubts about return eligibility please Contact Us and we would be more than happy to assist you.

This page and policy were last updated: July 14th 2023

FAQs

This is the line that runs from the front of the vehicle to the rear. On most vehicles it connects to a junction then you will have rear axle lines. On a few cars the intermediate lines will connect to the rear wheels. It is recommended to change the axle lines if you are replacing the intermediate lines.

Our kits include all of the solid metal lines for that section of the vehicle.

We are happy to help! Please help us to help you by going to our return form and filling out the form as best as you can in order to request a return.

  • Modern Day stands by our parts and is happy to accept returns within 30 days of purchase. Parts must be in new condition.
  • If a part arrives damaged, or is defective, Please report it to us immediately. So we can handle it for your promptly.

Yes but you will need to order in advance. All of our items are not stocked at our location. So please place your order online and we will notify you when it is ready for pick up.

Unfortunately we cannot offer single lines outside of kits

Yes, all are covered by the manufacturer's standard warranty. Most warranties cover the cost of parts. Any installation or other fees are non-refundable.

Online we accept PayPal and all major Credit Cards. If your are picking an item up we gladly accept cash.

We can only ship to your confirmed address in PayPal or your billing address if you pay with a credit card.

Orders typically Arrive within 3 to 10 days depending if it is a stocked item or something we have manufactured at time of sale.

Yes please send us a message through our custom orders page.

Yes, but items sent out of the continental U.S. may incur additional charges based on their destination

The left and right sides on a vehicle are determined as though you were sitting in the driver's seat. The left is the driver's side, and the right is the passenger's side.

Check it again tomorrow. It takes up to 1 day for the carrier to give status and a delivery date. UPS and FedEx provide delivery dates, USPS usually does not but they take no longer than 5 business days.

Yes! Thank you for your military service!

Still have a question or concern?  Please contact use our contact us form!

Yes! Thank you for your military service!

Warranty Information

Customer service is our top priority and because we value your time and energy we ask you to visit our Contact Us page and reach out so that we may assist you in finding the correct warranty for your product. Please include your name, the name on the order, the order number, and the SKU of the product to ensure the quickest and most accurate response to your inquiry.

Product Notices

*NOTE: Product images may not reflect actual product appeareance.