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TR Subaru WRX/STi 2008+ Oil Cooler Kit With Thermostat, image 1 of 3
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TR Subaru WRX/STi 2008+ Oil Cooler Kit With Thermostat

Sold by Tomioka Racing (TR)

$660.00

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About this product

TR oil cooler features 16 row cooler core with high quality stainless steel braided lines and fittings. TR oil cooler is the perfect upgrade for street or track car. Oil cooler kit prolongs the life of the engine oil and internal components especially for subarus under harsh driving conditions. The oil cooler also increases the overall engine oil capacity to make sure plenty of lubrication for the boxer engine. TR oil cooler comes assembled and includes all hardware with brackets for bolt-on installation. This kit comes in ready with built-in themostat oil-sandwich adapter, perfect for winter driving, to make sure the oil is not over cooled. Thermostat opens at 180F to ensure proper warm up. We have seen up to 30 degrees Fahrenheit of oil temperature improvement over stock during aggressive driving conditions!*

* Depends on modifications

Features 16 Row Oil Cooler Core High Quality Stainless Steel Braided Line High Flow Aluminum Fittings & Line Precision Machined Fittings Temperature Controlled

Kit Contents:
• 16 Row Oil Cooler with Alumium Adapters x 1
• Stainless Steel Braided Line with Fittings x 2
• Oil Sandwich Adapter with Built-In Thermostat x 1
• Mounting Bracket x 1

Oil Temp & Thermostat FAQ

Why did TR choose a 180°F thermostat?
The 180°F plate balances daily driving and performance. It keeps the cooler bypassed until ~180°F for normal warm-up, then opens (fully ~190–195°F) to control oil temps during load so the FA24 stays in the ideal ~200–230°F range.
Do I need a 200°F thermostat?
Usually no. A 200°F plate simply delays flow to the cooler, which can raise steady-state temps by ~10–15°F. It doesn’t increase peak cooling capacity.
Will 180°F run too cool in winter?
No. The thermostat keeps the cooler bypassed until warm. In very cold climates with short trips, minor airflow tweaks (e.g., slight grille blocking) are more effective than changing thermostat temp.
What oil temps should I expect?
  • Cruise / mixed driving: ~185–215°F
  • Spirited or hot weather: ~210–240°F (airflow & mounting matter)
  • Extended idling: temps may rise due to limited airflow across any air-to-oil cooler
Track use tips
Ensure clean, direct airflow to the core, avoid hose kinks, and recheck fittings after initial hard pulls. Monitor temps as usual.

Description supplied by Tomioka Racing (TR) through its current Shopify listing. Product, performance, and health claims are the seller’s and have not been independently verified by StorkScout.

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Current listing
$660.00
Shop at Tomioka Racing (TR)