Keep your FA20 happy on street and track. The Tomioka Racing Temperature-Controlled Oil Cooler Kit is engineered for the 20152021 Subaru WRX (FA20DIT) to stabilize oil temps, preserve viscosity under boost, and add confidence on spirited drives, canyon runs, and HPDE days.

Why it works

• Thermostatic control (~180F start-to-open): OEM-like warm-up, then automatic routing through the cooler as temps rise (fully open ~190195F).
• High-efficiency stacked-plate core: Excellent heat rejection with low pressure drop when paired with the included -AN lines.
• Vehicle-specific brackets: Clean, repeatable fitment and reliable airflow to the core.
• Motorsport-grade plumbing: Heat- and oil-resistant lines and swivel fittings simplify routing and service.

Real-world benefits

• More stable oil temps: Helps prevent heat-soak spikes during back-to-back pulls and long climbs.
• Protects bearings & turbo: Keeps viscosity in the sweet spot so the FA20 can take abuse without breaking a sweat.
• Daily-drivable: Thermostat bypasses the core when coldno overcooling in winter.

Whats included

• Thermostatic sandwich plate (start-to-open ~180F)
• High-efficiency stacked-plate oil cooler core
• Vehicle-specific mounting brackets & hardware
• Braided -AN10 oil lines with fittings
• Installation guide

Fitment

• Subaru WRX 20152021 (FA20DIT)
• Does not fit STI EJ models.
• Compatible with stock or most aftermarket intakes and front bumpers; check airflow path and component clearance.

Installation notes

• Estimated time: 23 hours with common hand tools.
• Prime the lines and check for leaks after the first heat cycle.
• Mount where the core gets clean, direct airflow; re-check fittings after initial hard pulls.

Why 180F instead of 200F?

Earlier engagement keeps FA20 oil in the ideal operating range during load. A 200F thermostat simply delays flow to the cooler, often raising steady-state temperatures without adding peak cooling capacity.

Good to know

• Idling: Oil temps can rise when parkedany air-to-oil cooler needs vehicle airflow to reject heat.
• Track use: For hot climates or extended sessions, prioritize ducting and unobstructed airflow.

Backed by Tomioka Racing. Proven hardware designed for enthusiasts who drive hard and demand reliability.

FAQ

Will this overcool my WRX in winter?Not with the thermostatic plate. It bypasses the core until ~180F, so warm-up remains normal and the cooler only engages as needed.Why not use a 200F thermostat?A 200F plate delays cooling and typically raises steady-state temps. The ~180F start-to-open strikes the best balance for mixed street/track use.Do I need tuning after installation?No tuning is required. This kit manages oil temperature and does not alter ECU calibration.What temperatures should I expect?Most cars see roughly 185215F in mixed driving and 210240F in hot weather or spirited runs, depending on airflow and mounting.Any special maintenance?Check line/fitting tightness after the first few heat cycles and at each oil change. Replace lines if damaged and keep the core fins clean.

{ “@context”:”https://schema.org”, “@type”:”Product”, “name”:”{{ product.title | escape }}”, “image”:[{% for image in product.images %}”{{ image | img_url: ‘master’ | absolute_url }}”{% unless forloop.last %},{% endunless %}{% endfor %}], “description”:”{{ product.description | strip_html | strip_newlines | escape }}”, “brand”:{“@type”:”Brand”,”name”:”Tomioka Racing”}, “sku”:”{{ product.selected_or_first_available_variant.sku }}”, {% if product.selected_or_first_available_variant.barcode != blank %} “gtin13″:”{{ product.selected_or_first_available_variant.barcode }}”, {% endif %} “offers”:{ “@type”:”Offer”, “priceCurrency”:”{{ shop.currency }}”, “price”:”{{ product.selected_or_first_available_variant.price | divided_by: 100.0 }}”, “availability”:”https://schema.org/{% if product.selected_or_first_available_variant.available %}InStock{% else %}OutOfStock{% endif %}”, “url”:”{{ product.url | absolute_url }}” } {% if product.metafields.reviews.rating and product.metafields.reviews.count %} ,”aggregateRating”:{ “@type”:”AggregateRating”, “ratingValue”:”{{ product.metafields.reviews.rating }}”, “reviewCount”:”{{ product.metafields.reviews.count }}” } {% endif %}} { “@context”:”https://schema.org”, “@type”:”FAQPage”, “mainEntity”:[ {“@type”:”Question”,”name”:”Will this overcool my WRX in winter?”,”acceptedAnswer”:{“@type”:”Answer”,”text”:”No. The thermostatic plate bypasses the core until ~180F, so warm-up remains normal and the cooler only engages as needed.”}}, {“@type”:”Question”,”name”:”Why not use a 200F thermostat?”,”acceptedAnswer”:{“@type”:”Answer”,”text”:”A 200F plate delays cooling and typically raises steady-state temps. The ~180F start-to-open balances street and track use.”}}, {“@type”:”Question”,”name”:”Do I need tuning after installation?”,”acceptedAnswer”:{“@type”:”Answer”,”text”:”No. The kit manages oil temperature and does not alter ECU calibration.”}}, {“@type”:”Question”,”name”:”What temperatures should I expect?”,”acceptedAnswer”:{“@type”:”Answer”,”text”:”Typical mixed driving ~185215F; spirited/hot weather ~210240F depending on airflow and mounting.”}}, {“@type”:”Question”,”name”:”Any special maintenance?”,”acceptedAnswer”:{“@type”:”Answer”,”text”:”Recheck line and fitting tightness after first heat cycles and at each oil change; keep fins clean.”}} ]} { “@context”:”https://schema.org”, “@type”:”HowTo”, “name”:”Install Tomioka Racing Oil Cooler Kit on a 20152021 Subaru WRX”, “totalTime”:”PT3H”, “difficulty”:”https://schema.org/Moderate”, “supply”:[{“@type”:”HowToSupply”,”name”:”TR oil cooler kit”},{“@type”:”HowToSupply”,”name”:”Engine oil & filter”}], “tool”:[{“@type”:”HowToTool”,”name”:”Metric hand tools”},{“@type”:”HowToTool”,”name”:”Torque wrench”},{“@type”:”HowToTool”,”name”:”Jack & stands or lift”}], “step”:[ {“@type”:”HowToStep”,”name”:”Prepare vehicle”,”text”:”Safely lift the car and remove the undertray.”}, {“@type”:”HowToStep”,”name”:”Install sandwich plate”,”text”:”Remove the oil filter, install thermostatic sandwich plate, and torque per spec.”}, {“@type”:”HowToStep”,”name”:”Mount cooler core”,”text”:”Attach the core using the supplied brackets in an area with clean airflow.”}, {“@type”:”HowToStep”,”name”:”Route lines”,”text”:”Measure twice and route braided lines away from heat and moving parts; tighten fittings.”}, {“@type”:”HowToStep”,”name”:”Prime & check”,”text”:”Prime lines, refill oil, start engine, and inspect for leaks; recheck after heat cycle.”} ]}