Welcome to the official GReddy USA blog: oil block

Thursday, July 17, 2025

Newly Revised GReddy Thermostatic Oil Cooler Std Block Adapters

Standard -10 GReddy Oil Cooler Blocks (3/4-16UNF, M20xP1.5, or M20xP1.5 High sizes)

12401187 3/4 x 16UNF GReddy Oil Cooler Block -10AN (supersedes 12401123)

12401190 M20 x P1.5 GReddy Oil Cooler Block -10AN (supersedes 12401119)

12401194 M20 x P1.5 GReddy Oil Cooler High Block -10AN (supersedes 12401119 + 12002803)

Product features

◆ Replacement thermostatic oil cooler block adapter for std. GReddy oil cooler kits

◆ Key component to build your very own custom GReddy oil cooler kit.

◆ The design of the oil block with built-in thermostat has been improved & updated, and the oil flow path has been reviewed to optimize the flow rate at low and high temperatures.

◆ Kits available with standard GReddy -10 AN or optional smaller -8 AN or larger -12 AN outlets

◆ Use factory replacement oil filter or matching GReddy oil filter per application.
* Oil filters with an outer diameter of Φ80 or less, O-ring inner diameters of Φ52 or more ~ outer diameters of Φ76 or less can be installed.

GReddy High Oil Cooler Block Adapter
(ideal for Sub. flat-4 engines or late model turbo Honda engines)

◆ Optional Oil block STD high type 12401194 is a 20mm high mount type of oil block STD. Compared to the spacer type, the installation work has been simplified, and the weight has been reduced. In addition, by making the mounting surface Φ70, it is possible to accommodate special mounting seating surfaces.
* Except for the lift-up part, it has the same design as the oil block STD. Please pay attention to the surrounding clearance.

◆ The updated screw size is engraved on the center bolt so that it can be identified at a glance.

Revised Replacement Center-bolts

12401197 3/4-16UNF - 3/4-16UNF Center bolt (supersedes 12401152)

12401198 M20xP1.5 - M20xP1.5 Center bolt (supersedes 12402813)

12401196 M20xP1.5 - M20xP1.5 High Center bolt (partially supersedes 12002803)

Optional GReddy Oil Cooler Blocks with smaller -8AN or larger -12AN fittings

12401186 3/4 x 16UNF GReddy Oil Cooler Block -8AN (supersedes 12401112)

12401189 M20 x P1.5 GReddy Oil Cooler Block -8AN (supersedes 12401125)

12401193 M20 x P1.5 GReddy Oil Cooler High Block -8AN (supersedes 12401119 + 12002803)

12401188 3/4 x 16UNF GReddy Oil Cooler Block -12AN (supersedes 12401124)

12401191 M20 x P1.5 GReddy Oil Cooler Block -12AN (supersedes 12401127)

12401195 M20 x P1.5 GReddy Oil Cooler High Block -12AN (supersedes 12401119 + 12002803)

Friday, May 3, 2019

GReddy GREX Oil Block Adapter Type E

GReddy Oil Block Adapter (Oil Cooler Kit) Campaign - FREE Metal Label and Decal

To help clarify exactly which type of oil filter your Oil Cooler Block Adapter needs, use our FREE GReddy Metal Label and Decal in your engine bay.

If you have a GReddy Oil Block Adapter or GReddy Oil Cooler Kit, you can receive yours FREE, just follow the steps below...

HAVE A GREDDY OIL COOLER OR GREDDY OIL BLOCK ADAPTER...
GET YOUR FREE GREDDY METAL LABEL AND DECAL (follow below...)

1.)   Identify which type of Label you need for your correct Oil Filter Threads:
        3/4-16UNF or M20xP1.5
      a.)   There are basically 3 types.   See (Figure A. below) Compare the Center Bolt markings:
  b.) The simplest way to identify the Oil Filter Threads from your Center Bolt is the length
of the Threads:
Short Threads 3/4-16UNF - H:13mm and Long Threads M20xP1.5 - H:20mm
c.)   Center bolt: Eng. 3/4-16UNF to Filter 3/4-16UNF - No Markings
Eng. M20xP1.5 to Filter 3/4-16UNF - Line on every corner of bolt hex
Eng. M20xP1.5 to Filter M20xP1.5 - Line around entire base (+ longer threads)

i.) Pre-2017 The most common type of Filter Thread is the 3/4 x 16UNF - basically because all GReddy Oil Cooler Kits and Oil Block Adapters prior to 2018, all used either a center bolt adapter that was Engine: M20xP1.5 to Filter: 3/4x16UNF or Engine: 3/4x16UNF to Filter: 3/4x16UNF.

ii.) In 2017 GReddy introduced a new, more convenient Engine M20xP1.5 to Filter M20xP1.5 (center bolt p/n 12028813) and (oil block adapter p/n 12401119.) Currently only newer Oil Cooler kits like the 2017-on Honda Civic Type-R and Civic Si / Sport Hatch Oil Cooler kits and new M20xP1.5 kits will come with this M20xP1.5 center bolt.

   2.) Go to Instagram and search @greddyperformance and then "Follow" our account.
   3.)   Next take an engine bay photo(s) with your GReddy/GREX Oil Block Adapter from your
          GReddy Oil Cooler kit or your Custom Oil cooler kit, which uses a GReddy Oil Block.
   4.)   Post that photo (or photos) on your account with your Oil Filter Thread - HASHTAG:
          #GReddy3Q or #GReddyM20 along with Tagging @greddyperformance

   5.) We will then DM you on Instagram for your full mailing address or you can email us at
          shop@greddy.com with a link to your instagram post and your full mailing address.
(please be sure to let us know what size Oil Filter Threads you have: 3/4-16UNF
           or M20xP1.5) - * FREE Shipping for USA Customers / Int'l Customers, just pay shipping.