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Four Layer Construction.
Not all performance head gaskets are created equal. All Permaseal MLS-R head gaskets incorporate state
of the art four layer design
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- Active Layers — the top and bottom outer or active layers are manufactured
from NOK’s NBR pre-coated stainless steel ensuring excellent micro sealing of engine
fluids with precision embossing around critical sealing points to provide additional
fluid sealing performance. The use of pre-coated materials ensures greater control
of the coating thickness for optimum pressure distribution over the entire gasket.
- Control Layer — the centre or control layer is manufactured from steel and
ensures the head gaskets overall thickness tolerances are met.
- Stopper Layer* — manufactured from stainless steel and measuring only 0.15mm
thick the stopper layer features a precision fold around the cylinder bores creating
a load point around the combustion chamber. Combined with additional embossing on
the active layers the stopper layer delivers truly superior sealing of combustion
gases.
*Excludes S2096MLSR which has coined edge due to engine design.
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Here is a list of the current applications, with more to be added soon.
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Manufacturer
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Engine
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Thickness*
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Bore**
|
Volume***
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Part #
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GM /Holden
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308, 5.0 Litre Holden V8
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1.10mm
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103.88mm
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9.32cc
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S2610MLSR
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|
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5.7 Litre V8 Gen III Holden/Chevrolet
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1.30mm
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100.00mm
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10.21cc
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S2234MLSR
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|
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6.0 Litre V8 Gen IV Holden/Chevrolet
|
1.30mm
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104.50mm
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11.15cc
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S2500MLSR
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Honda
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K20A3 / K20Z1
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0.80mm
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87.00mm
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4.55cc
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S4840MLSR
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|
|
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1.10mm
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87.00mm
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6.53cc
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S4841MLSR
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|
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K24A3 / K24Z1
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1.10mm
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89.00mm
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6.84cc
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S4844MLSR
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F20C1 / F20C2
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0.38mm
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88.00mm
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2.31cc
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S4846MLSR
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|
|
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0.80mm
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88.00mm
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4.86cc
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S4847MLSR
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|
|
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1.10mm
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88.00mm
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6.69cc
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S4848MLSR
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Mitsubishi
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4G63T DOHC 16 Valve EVO I - EVO III
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1.30mm
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86.00mm
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7.55cc
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S2131MLSR
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4G63T DOHC 16 Valve EVO IV - EVO VIII
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1.30mm
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86.00mm
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7.55cc
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S2218MLSR
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4G63T DOHC 16 Valve EVO IX
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1.30mm
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86.00mm
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7.55cc
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S2550MLSR
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Nissan
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RB25DET DOHC 24 Valve 87mm bore
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1.10mm
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87.00mm
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6.53cc
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S4411MLSR
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|
|
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1.30mm
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87.00mm
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7.73cc
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S4413MLSR
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|
|
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1.50mm
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87.00mm
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8.91cc
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S4415MLSR
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RB25DET DOHC 24 Valve 88mm bore
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1.30mm
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88.00mm
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7.90cc
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S4913MLSR
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|
|
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1.50mm
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88.00mm
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9.12cc
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S4915MLSR
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|
|
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1.80mm
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88.00mm
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10.90cc
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S4918MLSR
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|
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RB26DETT DOHC 24 Valve 87mm bore
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1.30mm
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87.00mm
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7.73cc
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S4513MLSR
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|
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1.50mm
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87.00mm
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8.91cc
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S4515MLSR
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|
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1.80mm
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87.00mm
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10.70cc
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S4518MLSR
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|
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RB26DETT DOHC 24 Valve 88mm bore
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1.30mm
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88.00mm
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7.90cc
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S5013MLSR
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|
|
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1.50mm
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88.00mm
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9.12cc
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S5015MLSR
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|
|
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1.80mm
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88.00mm
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10.90cc
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S5018MLSR
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|
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RB30E/ET SOHC 12 Valve
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1.30mm
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87.00mm
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7.73cc
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S2440MLSR
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|
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SR20DET DOHC 16 Valve
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1.10mm
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87.50mm
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6.61cc
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S2162MLSR
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|
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VQ35DE LH
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0.78mm
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96.00mm
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5.65cc
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S2541MLSR
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VQ35DE RH
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0.78mm
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96.00mm
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5.65cc
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S2542MLSR
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Subaru
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EJ20 DOHC 16 Valve
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1.30mm
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93.50mm
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8.93cc
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S2096MLSR
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|
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EJ25
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1.10mm
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101.00mm
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8.81cc
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S2135MLSR
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|
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FA20VVT LH
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0.78mm
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89.50mm
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4.91cc
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S4619MLSR
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|
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FA20VVT RH
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0.78mm
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89.50mm
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4.91cc
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S4620MLSR
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Toyota
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2JZ-GE/GTE 24 Valve
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1.30mm
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87.00mm
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7.73cc
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S2217MLSR
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*Thickness after tightening **Bore size of
gasket ***Volume per cylinder of gasket
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Permaseal MLS-R Performance Head
Gaskets
Today’s modern engines feature compact, lightweight cylinder blocks and cylinder
heads. In the never ending quest for greater power output engine builders can add
forced induction systems such as turbocharging, supercharging or nitrous injection;
modify electronic induction system controls and install performance engine components.
The combined result; extreme combustion pressures and to reliably seal these pressures
requires an advanced head gasket design.
Permaseal are now adding to their reputation for high quality gaskets with the introduction
of Permaseal MLS-R High Performance.
The Permaseal MLS-R range of head gaskets has been developed to meet these very
rigorous requirements. Engineered, designed and manufactured in Japan to exacting
tolerances Permaseal MLS-R head gaskets offer the performance engine builder the
highest levels of uncompromising quality.
Permaseal MLS-R head gaskets incorporate state of the art four layer design and
with the extensive use of stainless steel materials allows each individual layer
to be thinner delivering increased rigidity and durability. Other benefits from
the use of stainless steel materials in the construction are uniform heat distribution
and improved thermal transfer between the cylinder head and block of the engine
and a balanced; even distribution of clamping loads across the entire sealing surface
minimising cylinder bore distortion.
The extensive use of stainless steel materials allows each individual layer to be
thinner delivering increased rigidity and durability.
Other benefits from the use of stainless steel materials in the construction are
uniform heat distribution and improved thermal transfer between the cylinder head
and block of the engine and a balanced; even distribution of clamping loads across
the entire sealing surface minimising cylinder bore distortion.
It is the stopper layer that sets the
true high performance gaskets apart from competition.
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