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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

  • 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.
Here is a list of the current applications, with more to be added soon.
Manufacturer Engine Thickness* Bore** Volume*** Part #
GM /Holden 308, 5.0 Litre Holden V8 1.10mm 103.88mm 9.32cc S2610MLSR
5.7 Litre V8 Gen III Holden/Chevrolet 1.30mm 100.00mm 10.21cc S2234MLSR
6.0 Litre V8 Gen IV Holden/Chevrolet 1.30mm 104.50mm 11.15cc S2500MLSR
6.0 Litre V8 Gen IV HSV       Soon......
Mitsubishi 4G63T DOHC 16 Valve EVO I - EVO III 1.30mm 86.00mm 7.55cc S2131MLSR
4G63T DOHC 16 Valve EVO IV - EVO VIII 1.30mm 86.00mm 7.55cc S2218MLSR
4G63T DOHC 16 Valve EVO IX 1.30mm 86.00mm 7.55cc S2550MLSR
Nissan RB25DET DOHC 24 Valve 1.30mm 87.00mm 7.73cc S2086MLSR
RB26DETT DOHC 24 Valve 1.30mm 87.00mm 7.73cc S2089MLSR
RB30E/ET SOHC 12 Valve 1.30mm 87.00mm 7.73cc S2440MLSR
SR20DET DOHC 16 Valve 1.10mm 87.50mm 6.61cc S2162MLSR
VQ35DE  LH 0.78mm 96.00mm 5.65cc S2541MLSR
VQ35DE  RH 0.78mm 96.00mm 5.65cc S2542MLSR
Subaru EJ20 DOHC 16 Valve 1.30mm 93.50mm 8.93cc S2096MLSR
EJ25 1.10mm 101.00mm 8.81cc S2135MLSR
Toyota 2JZ-GE/GTE 24 Valve 1.30mm 87.00mm 7.73cc S2217MLSR
*Thickness after tightening   **Bore size of gasket   ***Volume per cylinder of gasket


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.