Many users and tuning shops move us to start selling 9 metal head gaskets, including for B6 standard (STD) bores and tempered metal head gaskets for turbo cars: B6 and BP lines.
Great features and superb quality of our gaskets will grasp your minds.
We used to use 81.0mm diameter bores for STD pistons (78.0mm-81.0mm).
However, many users do not require compression down, and their requests are enough to change our bore diameters.
The improved bore diameter is 79.0mm, even though a STD cylinder bore is 78.0mm.
The reason why we have decided 79.0mm is that the diameter ranges of the genuine pistons for O/H gaskets are up to 78.5mm.
The genuine head gasket, made with asbestos, actually has a 79.5mm bore diameter and a 1.3mm thickness, while our production for tuning lovers has no-frills specification.
That is, our metal head gaskets have a more user-friendly spec than the genuines that are not good for tunings.
Maruha Metal Head Gaskets for B6 Lines
| Bore Diameter | Thickness | Gasket Type |
| 79.0mm | 0.8mm | Bead Type |
| 79.0mm | 1.0mm | Bead Type |
| 79.0mm | 2.0mm | Stopper Type (for B6 turbo) |
| 81.0mm | 0.8mm | Bead Type |
| 81.0mm | 1.0mm | Bead Type |
We emphasize that bore thickness of stopper types is 2.0mm.
This allows gaskets for superchargers and turbochargers to be a superior stopper.
The stopper type gaskets can control compression ratios precisely and can prevent dropping gaskets caused by severe boost pressures.
Maruha Metal Gaskets for BP Lines
| Bore Diameter | Thickness | Gasket Type |
| 83.0mm | 2.0mm | Stopper Type (for BP turbo) |
| 86.0mm | 0.6mm | Bead Type |
| 86.0mm | 0.8mm | Bead Type |
| 86.0mm | 2.0mm | Stopper Type (for BP turbo) |
The list shows you that we have bead types and stopper types for Maruha
Head Gasket Lines.
At the next step, we will mention the differences between the 2 types.
(Graphic) … stainless steel bead
Left: Maruha Metal Head Gasket (for BP of 86.0mm lines)
Keeping a sealing property by sandwiching a bead.
Right: The Genuine NA8 Head Gasket
Compared to the Maruha’s gasket, it seems that there is no bead.
But in fact, they take a method to form a cored plate into a bead.
Down: The Genuine B6 Head Gasket(P4の写真をこちらに移しました)
Grommet type gaskets with carbon seats are adopted.
The bores are more than 79.5mm, which may be suggested that they are not useful for tunings by judging their performance and compression.
The stopper is set on the single side of the gasket, which is different from grommet types.
And the other side is flat to increase sealing by fitting the bead gasket to stainless steel.
The uneven surface pressure, thus the cylinder area is good to withstand boost pressures.
Metal head gaskets are all-purpose used as genuine parts as well as tunings.
They used to be pricey, but become popular because mass production of them can contribute to stable price levels and in order to prevent asbestos gaskets from causing air pollution and health damage.
The great point of metal head gaskets is metal’s high conduction that avoids heat accumulation.
It conducts heat within a combustion chamber to a block side smoothly and can be reduced gasket blowing caused by heat fusion.
Spring boards on the beads act as improving steady sealing pressure resulted in the stress power between the head and the block.
Therefore, ideal compression ratios and squish areas just as you intended can be easily maintained by layering several boards.
Maruha Metal Head Gasket is free from blowing a gasket and moreover, you will be surprised at its easily tuning.
IT IS THE MONEY!
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