Solid Billet Aluminium Oil Filter Sandwich Plate with 92°C Thermostat

Part No. HEL-OSP
  • FREE UK Delivery

The cutting-edge Solid Billet Sandwich Plate from HEL Performance.

Before now you had to compromise on features when buying a sandwich plate but not anymore. We noticed a gap in the market for an easy all-in-one solution so we decided to design and build one ourselves from scratch…

We machine our oil filter sandwich plate in the UK from strong and lightweight solid billet aluminium. We also included a built-in reliable thermostat that prevents flow to the cooler until the oil temperature reaches 92°C (197.6°F). This allows the engine oil to reach operating temperature quicker and gives extra protection in cold climates.

We machine our threaded center bolts from the highest quality stainless steel. Most of our competitors use a zinc-plated mild steel bolt which is at risk of corrosion. We offer the bolt in an M20 x 1.5 or 3/4" UNF thread which will be suitable for 95% of European and Japanese cars that have an external oil filter.

We've also had not one, but two 1/8" NPT sensor ports built-in as standard, so you can attach both oil temperature and pressure sensors if you wanted. If you prefer not to use one or both the sensor ports, we include two blanking plugs.

Both the inlet and outlet ports have -10 AN JIC threads. Unless you plan on having male fittings going directly into the plate, you will need two male/male adapters which we can supply in -8 AN JIC or -10 AN JIC.

Our show-stopping sandwich plate comes in an attractive anodised black finish and we hand paint each one individually with a glossy red HEL logo at our headquarters in Devon, England.


  • 1x Solid Billet Aluminium Oil Filter Sandwich Plate
  • 1x 92°C (197.6°F) Thermostat
  • 2x 1/8" NPT Sensor Ports*
  • 2x 1/8" NPT Sensor Port Blanking Plugs*
  • 1x Stainless Steel Threaded Center Bolt (M20 x 1.5 or 3/4" UNF)

* We recommend using liquid PTFE to seal anything that goes into the ports, whether you're using sensors or the supplied blanking plugs.

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