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1978 Mercury Monarch Exhaust Manifold Gasket Set 8 Cyl 5.0L Mr Gasket

4 on 3 ratings
  • Features:
    • High-Temperature Exhaust Material
    • Withstands Extreme Exhaust Heat
    • Excellent Sealing Durability And Torque Retention
    • Superior Tensile Strength
  • Manufactured from high-temperature composite exhaust material. Provides maximum torque retention to eliminate gasket failure. Can be trimmed if necessary for modified port applications. Precision die cut for an excellent fit. For OE replacement, high-performance street, drag race and oval track.
This Part Fits the Following OEM/Substitute Numbers:
1415

Additional Fitment Information:
Vehicle Block CC Engine CID
1978 Mercury Monarch V - 8 Cyl 5.0L 302
Brand Mr Gasket
Part # G12253
Condition New
Warehouse B
Mr Gasket

Monarch Mr Gasket Exhaust Manifold Gasket Set 253 1978 Mercury
  • Rectangle Port Shape; Port Dimensions W-1.12 in. x H-1.48 in.
  • Exhaust Gasket Set; Rectangle Port Shape; Port Dimensions W-1.12 in. x H-1.48 in.;
  • Exhaust Gasket Set

    • General

    Gasket Line
    Performance
    WARNING CA Proposition 65
    No
    Port Shape
    Rectangle
    Collector Gaskets Included
    No
    Engine Make/Size
    Ford Small Block Windsor
    Thickness
    0.062 In.
    Port Size
    1.120 In. X 1.480 In.

    Packaging

    package quantity
    1
    length
    0.10 in
    width
    3.70 in
    height
    22.70 in
    weight
    0.23 lb
    Information on technical characteristics, the delivery set, the country of manufacture and the appearance of the goods is for reference only and is based on the latest information available at the time of publication.
    1. Jimmy Stewart
      05 Aug, 2014
      Excellent update for 'gasketless' GM TBI small-blocks - proper port match. Don't forget to replace the old manifold bolts, as they won't hold torque after years of hot/cold cycling.
    2. Tom C
      04 Jun, 2013
      These are beautiful gaskets. I am thinking about getting an extra set to mount on the wall in my ManCave. I expect my rating will go up after the engine is reinstalled and running again.
    3. Bloose
      10 Oct, 2011
      When I first installed these I had a leak on the passenger side header. When I puller the header I found that the gasket didn't cover part of the header flange. In reality the problem was more with the header than the gasket but the gasket is also somewhat at fault. The reason I say this is because the gasket port size is a good bit larger than the port on the head. If they offered different gaskets for different part sizes you could likely get a better fit. I.E. one gasket for stock ports, one for larger ports, etc. Much as they do for Ford and Chevy. In the end though I cut the gasket into separate pieces for each port section. I then elongated the holes for the offending port and got it to match the header flange. No more leaks and is holding up well at 3500 miles.B

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