T7Design - Honda  K20 Billet Thermostat Housing Rear - ORB10

T7Design Honda K20 Billet Thermostat Housing Rear - ORB10

T7Design | Honda K20 Swivel Neck Thermostat Housing (Low Temp 68c) - Black

Honda K20 Swivel Neck Thermostat Housing (68c) - Black

T7Design Honda K20 Front & Rear Thermostat Housings Bundle (78c)

£356.40 £297.00 £396.00

To £372.24 £310.20 £411.84

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T7Design Honda K20 Billet Swivel Neck Thermostat Housing and Rear Thermostat Housing Set (Standard Temp 78c)
T7Design Honda K20 Front & Rear Thermostat Housings Bundle (78c)

In stock

£356.40 £297.00


The T7Design Honda K20 Front & Rear Thermostat Housings Standard Temperature Bundle includes:

K20 Swivel Neck Thermostat Housing - Hard Anodised Black

T7design Honda K20 swivel neck thermostat housing is fully machined from 6062-T6 billet Aluminium and is available with either a 32mm or AN16 hose connector. The outlet angle is the same as OEM and is within 10mm offset from the mounting flange face to ensure all OEM and aftermarket hoses fit perfectly. The housing also incorporates an M22 x 1.5 hole for radiator fan switches – perfect for k-swaps.

Using top of the range metrology grade laser scanning and 3D printing equipment we can ensure the products are designed for perfect operation and fitment. For example, our 3-bolt mounting flange aligns perfectly with the outside profile of the OE plastic mounting face.

Our thermostat housing is the only aftermarket housing you should run on your vehicle, unlike the competition we use the OEM dual plunger thermostat that ensures operation exactly like Honda intended. Other units actually reduce the efficiency of your cooling system by not using a dual plunger thermostat design which is there to gradually reduce and stop flow through the bypass port when things get hot. Also, plain steel is not used anywhere in our housings, this ensures that with our units you will not face orange rust covering all surfaces inside your engine and radiator, further reducing the efficiency of your cooling system.

The unit is available with or without a radiator fan switch, if you chose without then it will be supplied with a custom made billet Aluminium M22 blanking plug and O-ring. The fan switch supplied is manufactured in the EU and are rated to over 1 million operations, we do not substitute on quality with our products! The fan switch turns on at 95c and off at 86c.

T7Design Honda K20 Billet Thermostat Housing Rear

The OEM version is exact replacement for Honda part number: 19320-PNA-003

We've enhanced our OEM replacement thermostat housing rear to accommodate applications utilizing aftermarket heater systems, where the original formed metal tube may not be suitable. The modification involves replacing the original counter-bored hole for the push-fit heater hose with an ORB10 threaded hole. This adjustment provides users with the flexibility to adapt any heater hose to the housing. As part of the kit, we include an ORB10 port plug for instances where the heater hose is not utilized. Additionally, we include an ORB10 to AN10 male adapter for use of AN fittings for the heater circuit.

Introducing our full CNC machined billet K20 Thermostat Housing Rear half, this is a beautiful crafted like for like replacement of the original Honda part: 19320-PNA-003. As the original plastic housings age, they become susceptible to cracking, distortion, and leaks due to the effects of time and numerous heat cycles. Our housing offers a durable alternative, seamlessly compatible with all original hoses, including the thermostat bypass, metal heater hose, and either an original thermostat or our own billet version for a comprehensive upgrade. Maintaining precise alignment with OEM specifications, including mounting points, hose locations, and thermostat mounting faces, this housing functions identically to the original piece, but without the drawbacks of the original.

To design this component, we 3D laser scanned a brand new, pristine, original housing to capture precise OEM dimensions, we then reverse engineered the part to obtain datums, critical measurements and features prior to drawing the part to make it suitable for a completely different manufacturing process; 3D CNC machining. This preliminary information guided us in transforming the design to align with the requirements of an entirely distinct manufacturing method—3D CNC machining. Extensive effort was dedicated to refining the design, ensuring that every aspect could be seamlessly machined while preserving each key feature in its original position. This meticulous approach was undertaken to guarantee a flawless fit, finish, and function of the final product. Please be aware that the production of this part from solid billet necessitates a significant amount of machine time.

Thermostat Housing Rear Specification
Engine Compatibility Will fit any Honda K series engine which uses the OEM part: 19320-PNA-003
Material 6062-T6 Billet Aluminium
Finish Hard Anodised Black
Brand T7Design
Swivel Neck Thermostat Housing Specification
Thermostat Opening Temperature 78°C
Hose Connection 32mm or AN16
Switch Port M22 x 1.5
Thermostat Type Dual Plunger
Material 6062-T6 Billet Aluminium
Finish Hard Anodised Black
Brand T7Design
Bundle Contents
Quantity Description
1x Billet Thermostat Housing Rear
1x O-Ring - For sealing to water pump housing.
3x M6 BZP Cap Head Bolts
1x ORB10 Port Plug (ORB model only)
1x ORB10 to AN10 Adapter (ORB model only)
1x Swivel Neck Thermostat Housing
1x M22 Billet Blanking Plug
1x 32mm or AN16 Hose Connector
1x M22 x 1.5 Radiator Fan Switch (Optional)
3x M6 x 20mm BZP Cap Head Bolt
  • Please note, this is fully compatible with any Honda engine that uses the original part: 19320-PNA-003
  • Please double check you are ordering the correct hose connector and switch prior to checkout.
More Information
Vehicle Manufacturer Honda
Honda Engine Code K20
Manufacturer T7Design

Shipping Information & Charges

VAT is included on the UK prices below, no VAT is applicable on ROW prices.

European Customers: We offer a next working day delivery service to most European countries, please get in touch for pricing.

ROW Customers: If you would like a more accurate shipping quote or a faster service via DHL please get in touch with your requirements.

United Kingdom & Northern Ireland

Service GBP 0 - 50 (inc VAT) GBP 50+ (inc VAT)
RM Second Class 3.60 N/A
RM First Class 4.20 N/A
DPD / DHL Next Working Day 9.00 9.00
DPD Next Working Day by 12am 16.50 16.50
DPD Saturday All Day 15.00 15.00
DPD Saturday by 12am 39.50 39.50
DPD Sunday All Day 19.50 19.50

Scottish Highlands & Islands, Channel Isles, Scilly Isles, Isle Of Man, Isle of Wight
Service GBP 0 - 50 (inc VAT) GBP 50+ (inc VAT)
RM First Class 4.20 N/A
DPD / DHL Two Day 17.30 17.30


DHL Tracked Delivery. Approx 2 - 7 days depending on distance from the UK.

Country Cost in GBP
AUT - Austria 30.00
BEL - Belgium 25.00
BIH - Bosnia and Herzegovina 50.00
BGR - Bulgaria 45.00
HRV - Croatia 35.00
CZE - Czech Republic 35.00
CHE - Switzerland 42.00
DNK - Denmark 30.00
EST - Estonia 35.00
FIN - Finland 35.00
FRA - France 35.00
DEU - Germany 28.00
GIB - Gibraltar 46.00
GRC - Greece 40.00
HUN - Hungary 35.00
IRL - Ireland 25.00
ISL - Iceland 50.00
ITA - Italy 32.00
LVA - Latvia 46.00
LTU - Lithuania 45.00
LUX - Luxembourg 26.00
NLD - Netherlands 26.00
NOR - Norway 45.00
POL - Poland 35.00
PRT - Portugal 35.00
ROU - Romania 45.00
SRB - Serbia 45.00
SVN - Slovenia 35.00
SVK - Slovakia 35.00
ESP - Spain 30.00
SWE - Sweden 35.00

Rest Of World

Below are the most popular countries we ship to world-wide. If your country is not listed please get in touch for a quote.

DHL Express: We offer shipping via DHL, please get in touch for pricing and more information on their Worldwide 1-2 day services.

Country Cost in GBP
CAN - Canada 60.00
JAM - Jamaica 50.00
JPN - Japan 70.00
MLT - Malta 58.00
MYS - Malaysia 50.00
NZL - New Zealand 52.00
RUS - Russia 50.00
ZAF - South Africa 49.00
THA - Thailand 55.00
USA - United States of America 70.00
SGP - Singapore 90.00


By Order Value: GBP 0 - 50 GBP 50 - 120 GBP 120+
AUS - Australia 40.00 60.00 80.00