Allows oil temperature management required for high power.

Without Bumper

With Bumper

Oil Cooler Core

Billet Aluminum Sandwich Plate

Oil Cooler Pipe

Oil Cooler Hose (#AN10)
| Track Name | FSW Short Course |
| Surface | Asphalt |
| Length | 810m~920m |
| Turms | 4~8 |
| Temperature | 25℃ |
| Suspension | HIPERMAX S |
| Exhaust | SUPER TURBO MUFFLER |
| Intake | HKS Cold Air Intake System |
| ECU | Power Editor |
| Turbo | Stock |
| Intercooler | HKS Intercooler Kit |
| Oil | HKS SUPER OIL Premium 0W-20 |

HKS has tested various ways that the danger of high chronic oil temperatures raises with GR Yaris, and HKS has developed a Turn-Flow Type oil cooler that allows continuous track driving. This provides competent oil management and continuous sustained performance.
The tests showed a clear high level of oil management, with about four times as many hours/miles driven in stock conditions. Authentic tests using real vehicles prove the high standards of HKS product.
| Vehicle | Model | Engine | Model Year | Core Size・Row | Core Location | Type | Hose Size | Aluminum Air Guide | Code No. | Manual | Remarks |
|---|---|---|---|---|---|---|---|---|---|---|---|
| GR YARIS | GXPA16 | G16E-GTS | 20/09 -24/03 | 412×114×40・10 (turn flow) | In front of the radiator | S type | #10 |