PHR (Powerhouse Racing) Supra Parts: What They Make and Why Builders Choose Them

Powerhouse Racing — PHR — is a Toyota Supra specialist based in the United States with a reputation that extends globally in the MK4 Supra and 2JZ-GTE community. They do not build generic performance parts. They build Supra-specific, 2JZ-specific, and JZA80-specific components engineered by people who have built hundreds of Supras and know exactly where the factory solutions fall short.

At J-Spec Garage, we stock PHR because our customers build Supras — and when someone is putting together a serious JZA80 build, PHR parts come up in the conversation consistently. This guide covers what J-Spec stocks from PHR and why those specific parts matter.

Who Is PHR — Powerhouse Racing?

Powerhouse Racing has been building high-performance Toyota Supra and 2JZ components since the late 1990s. They are not a general performance brand that happened to make a Supra part — they are a Supra shop that designs and manufactures components based on direct experience building and racing JZA80 chassis. Their parts reflect what a shop that has built 1,000hp Supras actually needs. PHR is US-based, which matters for J-Spec's customers: shorter lead times, domestic warranty support, and engineering done with North American build practices in mind.

PHR Aluminum Race Radiator for the MKIV Supra

The most widely specified PHR product in J-Spec's catalog is the aluminum race radiator for the MK4 Supra. The factory JZA80 radiator is a plastic-tank/aluminum-core unit adequate for stock power levels — it reaches its limits quickly on a modified car, especially on track days where coolant temps creep under sustained load.

The PHR Aluminum Race Radiator for the MKIV Supra improves on the stock unit in several specific ways:

• Full aluminum construction — no plastic tanks to crack or degrade; aluminum tanks brazed to the core for a one-piece assembly
• Larger core — more surface area than the factory unit; coolant temps stay lower under sustained hard use
• Direct fit for the JZA80 — engineered specifically for the MK4 Supra's radiator location and mounting points; no adapter plates or fabrication
• Higher pressure rating — aluminum construction handles higher system pressures than the factory plastic-tank design

For any Supra build above 400whp, or any car that sees regular track use, the PHR aluminum radiator is the correct solution. It belongs in every serious JZA80 build.

PHR 2JZ Engine Bay and Drivetrain Components

Beyond the radiator, J-Spec stocks a range of PHR Supra-specific components that address the JZA80's known service and upgrade needs:

• PHR Billet Serpentine Belt Tensioner Damper Arm for 2JZ — replaces the factory belt tensioner with a billet aluminum unit; eliminates tensioner deflection under hard use and accessory drive loads on modified 2JZ builds
• PHR Billet Rear Differential Bushings for 93-98 Supra (Press-In) — billet aluminum replacement for the factory rubber differential bushings; reduces drivetrain slop and improves power transfer precision under hard acceleration
• PHR Air Inlet Plate for 1993-98 Supra NA/TT — billet aluminum air inlet upgrade for both naturally aspirated and twin-turbocharged JZA80 applications
• PHR "Full Send" Timing Support Bracket — a 2JZ-specific timing chain guide support bracket for high-power builds; addresses a known timing system stress point on modified engines
• PHR AC Compressor Pulley Cover for 2JZ — billet cover for 2JZ builds where the AC compressor has been removed; replaces the factory mount area with a clean finished cover

PHR Supra Brake and Safety Components

• PHR Stainless Brake Lines for MK4 Supra with TT Brakes — stainless steel braided brake lines replacing the factory rubber lines; eliminates brake line expansion under pressure for more precise pedal feel, especially on track
• PHR Brake Master Cylinder Reservoir Cap Cover — billet replacement for the factory plastic brake fluid reservoir cap; a clean, functional upgrade for the engine bay
• PHR ABS Delete Kit for 1993-98 Supra (Right Hand Drive) — for RHD JZA80 builds deleting the ABS system; includes all required hardware for a clean ABS removal

Why J-Spec Carries PHR

J-Spec Garage's catalog is built around the platforms our customers actually build. PHR is the brand that comes up when Supra builders talk about radiators, billet drivetrain components, and chassis upgrades. Stocking PHR means we can supply the part the builder is already planning to use — with domestic availability and our price match guarantee. If you find PHR at a lower authorized price elsewhere, we'll match it.

Frequently Asked Questions

Is the PHR radiator compatible with front-mount intercooler setups?

PHR designs the MKIV Supra radiator for the stock radiator location and mounting points. Most front-mount intercooler setups are compatible. Confirm your intercooler routing before ordering if you are running a non-standard layout — top-mount setups that use the radiator space for intercooler positioning in some configurations may need a different solution.

Does PHR make parts for the A90 MK5 Supra?

PHR's primary catalog focus is the MKIV JZA80 Supra with the 2JZ engine. Their parts are designed for the JZA80 platform. For the A90 MK5, other brands are more appropriate.

Does J-Spec price match PHR?

Yes. J-Spec Garage offers a price match guarantee on all stocked products including PHR. Find the same item at a lower authorized price, contact us, and we'll match it.

Shop the full PHR collection at J-Spec Garage | JZ Collection | Supra Forced Induction