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1980 GMC C3500 Exhaust Manifold Gasket Set 8 Cyl 5.7L Mr Gasket

4 on 3 ratings
  • Features:
    • Withstands Intense Exhaust Heat
    • Resists Deteriorating
    • Easy Removal For Disassembly
  • Upgrade to Mr. Gasket Aluminum Layered Header Gaskets and eliminate blown exhaust gaskets forever. They conform to warped and damaged surfaces to create an airtight, leak-proof seal and will not shrink or deteriorate EVER.

Additional Fitment Information:
Vehicle Block CC Engine CID
1980 GMC C3500 V - 8 Cyl 5.7L 350
5 In Stock
Best Price:

Black Friday Deal

$72.19 USD
$86.63 USD
Brand Mr Gasket
Part # G127401G
Condition New
Warehouse B
Mr Gasket

C3500 Mr Gasket Exhaust Manifold Gasket Set 7401G 1980 GMC
  • Square Port Shape; Port Dimensions W-1.45 in. x H-1.48 in.
  • Aluminum Exhaust Gasket; Square Port Shape; Port Dimensions W-1.45 in. x H-1.48 in.;
  • Aluminum Exhaust Gasket

    • General

    Gasket Line
    Aluminum-layered
    WARNING CA Proposition 65
    No
    Port Shape
    Square
    Collector Gaskets Included
    No
    Engine Make/Size
    Chevrolet Small Block Gen I
    Thickness
    0.125 In.
    Port Size
    1.450 In. X 1.480 In.

    Packaging

    package quantity
    1
    length
    0.70 in
    width
    3.90 in
    height
    21.50 in
    weight
    0.52 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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