1. General Performance Parts Suppliers:
* Summit Racing: [https://www.summitracing.com/](https://www.summitracing.com/)
* Jegs: [https://www.jegs.com/](https://www.jegs.com/)
* Amazon: [https://www.amazon.com/](https://www.amazon.com/)
* eBay: [https://www.ebay.com/](https://www.ebay.com/)
* Local Auto Parts Stores: (e.g., AutoZone, Advance Auto Parts, O'Reilly Auto Parts)
2. Toyota-Specific Performance Parts Suppliers:
* Toyota Racing Development (TRD): [https://www.trdusa.com/](https://www.trdusa.com/) (May not have specific 20R parts, but worth checking)
* Yota Tech: [https://www.yotatech.com/](https://www.yotatech.com/) (Online forum with a dedicated section for the 20R)
* Toyota Supra MK2/MK3 Enthusiast Sites: Some parts may be compatible, especially those related to exhaust, intake, and engine management.
3. Specialty Shops:
* Performance shops specializing in Japanese vehicles: Search for "Japanese performance shop" in your area.
* Engine rebuilders: They may be able to source or provide custom parts.
Specific Parts to Consider:
* Intake and Exhaust: Header, exhaust manifold, air intake, cold air intake.
* Engine Management: ECU upgrades, adjustable ignition timing, piggyback systems.
* Compression: Higher compression pistons, headwork (porting and polishing).
* Camshaft: Performance camshafts to increase power and torque.
* Cooling System: High-flow water pump, upgraded radiator.
Important Considerations:
* Compatibility: Not all parts are compatible with the 20R. Always check compatibility before buying.
* Availability: Some parts may be harder to find than others, especially if you're looking for high-performance options.
* Cost: Performance upgrades can get expensive. Budget accordingly.
Remember, building a hot rod engine is a complex project. Research thoroughly, consult with experts, and be prepared to spend time and money.
