The Gaskets are Percey's Seal 4 Good Lifetime Gaskets
The Bolts are Percey's Split Lock. These are the 1 inch Stainless, Edelbrock heads easily except 1 inch bolts dirrectly with out anything under the bolt head, allowing a better hold depth.
The aluminum Gasket has a flat side and a cupped side. The flat side goes on the outside to mate with the Header. The Percey's gasket appears to come as a set of 4 , however 2 are pressed together to form 1.
Issues with a 12 point wrench were minimal. Three bolts were non accessible with the 12 point. This would be an issue for this particular Header and a die hard perfectionists would Balk at. I had no problem using Vise Grips, in fact these 12 points made it a breeze to tighten with them.
Next is the Vise grip issue.Issues like these are good to review.3 bolts were tightened with a vise grip. Headers with an aluminum Gasket compress as the bolts are tightened. As the bolts are tightened and compressing the aluminum they create a loosening effect on the bolts in either direction next to them. This effect happens easily if attention is not given to even torquing. The point I wish to make here is that the Vise grips tighten very easily on the three I had to use them on and cause the Bolts next to them to become loose just like the wrenched ones.Removing the spark plug made the job a simple one with the grips.
The following shows a gap prior to tightening and after.
The end result is a tight clean look with gaskets that will not burn and can be used over and over. If Paper type gaskets are used with the Split lock bolts then adjustments are made easy with an Allen Wrench and a 12 point wrench. Some Headers may require creative tool uses. All in all attention was given to the confinement of doing the job in the engine compartment (mine is not in the car yet) so every thing I did was in consideration of fender issues. I has a Small Block and this alone makes my application very good.


The Bolts are Percey's Split Lock. These are the 1 inch Stainless, Edelbrock heads easily except 1 inch bolts dirrectly with out anything under the bolt head, allowing a better hold depth.



The aluminum Gasket has a flat side and a cupped side. The flat side goes on the outside to mate with the Header. The Percey's gasket appears to come as a set of 4 , however 2 are pressed together to form 1.

Issues with a 12 point wrench were minimal. Three bolts were non accessible with the 12 point. This would be an issue for this particular Header and a die hard perfectionists would Balk at. I had no problem using Vise Grips, in fact these 12 points made it a breeze to tighten with them.


Next is the Vise grip issue.Issues like these are good to review.3 bolts were tightened with a vise grip. Headers with an aluminum Gasket compress as the bolts are tightened. As the bolts are tightened and compressing the aluminum they create a loosening effect on the bolts in either direction next to them. This effect happens easily if attention is not given to even torquing. The point I wish to make here is that the Vise grips tighten very easily on the three I had to use them on and cause the Bolts next to them to become loose just like the wrenched ones.Removing the spark plug made the job a simple one with the grips.

The following shows a gap prior to tightening and after.


The end result is a tight clean look with gaskets that will not burn and can be used over and over. If Paper type gaskets are used with the Split lock bolts then adjustments are made easy with an Allen Wrench and a 12 point wrench. Some Headers may require creative tool uses. All in all attention was given to the confinement of doing the job in the engine compartment (mine is not in the car yet) so every thing I did was in consideration of fender issues. I has a Small Block and this alone makes my application very good.
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