Shopping Cart

Your cart is empty.

Your cart is empty.

Remflex 12-004 Exhaust Gasket for Pontiac V8 Engine, (Set of 2)

Free shipping on orders over $29.99

$38.39

$ 17 .99 $17.99

In Stock

About this item

  • 1-1/8 inch width x 1-15/16 inch height Large D Port; Pontiac V8 - 326, 350, 370, 389, 400, 421, 428, 455 ('58-'79), Large D Port, Headers Only, 2/Set
  • 1-1/2 inch width x 1-15/16 inch height Oval End Ports
  • Heating and cooling of the exhaust system causes header and manifold flanges to warp resulting in gaps between the head and header which Remflex exhaust gaskets seal completely due to the thickness and compressibility of the 100 percent flexible graphite
  • Remflex exhaust gaskets come in a standard 1/8 inch thickness and are designed to crush 50 percent allowing them to fill any pits or gaps in the flange surface up to 1/16 inch
  • There are no rubber binders or composite materials in Remflex exhaust gaskets so they will not shrink or harden due to time or temperature eliminating the need to go back and continually retighten your flange bolts
  • Fit type: Universal Fit


Remflex Exhaust Gaskets are soft and compressible so the suggested torque for each gasket, which is generally much lower than factory torque, is listed on the back of each package. Remflex is made in the USA so as to control every step of the manufacturing process guaranteeing a superior product that you can rely upon. Remflex's unique flexible graphite material has been proven for more than 30 years in industrial applications, where temperatures routinely exceed 2000 degrees-day after day, week after week, year after year. For over 10 years Remflex have been bringing this technology to automotive enthusiasts of all kinds to eliminate exhaust leaks for good. Experience has shown that no gasket should be reused if you want a reliable seal, therefore Remflex do not sell or market gaskets as reusable even though it have been told that they have been reused successfully in the past. Do not use sealants of any type with gaskets. The sealant burns out rapidly leaving a gap which creates an exhaust leak. Remflex Exhaust Gaskets are good to 3000 degrees which far exceeds the temperature rating of any sealant.


James A. Konkle
Reviewed in the United States on September 28, 2022
Will solve your exhaust leak issue but handle with care. Also the bolt hole on your header that is sloted . On the gasket cut away the material at the bottom of that hole. So when you get your motor on the mounts gentley slide the gasket between the head and header. Then install the rest of your bolts and tighten to the recommended ft lb listed in instructions. Don't over tighten it doesn't take much to make a good seal. The added bonus is you can reuse a couple time if you follow all these instructions.
Donald R.
Reviewed in the United States on January 7, 2022
They will crumble when you even breathe on them. Waste of 40 dollars!
from NH
Reviewed in the United States on June 29, 2019
By the time I tried them it was to late to return bad deal my loss
chris schierl
Reviewed in the United States on April 13, 2019
really thick, my headers didnt seal with the regular thickness gaskets. so i bought these and they are thicker than 2 quarters stacked. no more leaks.
Recommended Products

$34.17

$ 17 .99 $17.99

4.6
Select Option

$15.95

$ 7 .99 $7.99

5.0
Select Option

$11.95

$ 5 .99 $5.99

4.3
Select Option

$17.38

$ 8 .99 $8.99

4.9
Select Option

$18.91

$ 8 .99 $8.99

4.7
Select Option