If you're chasing 500 to 750 horsepower on an SR20DET, KA, RB, or JZ build and you've been looking at top-mount manifold setups, the ISR Performance RSX3582 is the turbo that ISR built for exactly that range. It's a larger-frame turbocharger with dual ball bearing construction and a billet compressor wheel, delivering big power and strong response with the build quality that made ISR's smaller T2 replacement turbos a proven choice on the SR platform.
What It Is
The ISR Performance RSX3582 is a larger-frame, dual ball bearing turbocharger built for high horsepower Nissan and Toyota performance builds. It uses a billet compressor wheel for quick spool and efficient airflow, a water-cooled dual ball bearing center section, and a 0.82 A/R T3 turbine housing with a 90mm V-band discharge flange. It's the larger sibling to ISR's popular T2 replacement turbos, designed for builders who want more power than the smaller frame turbos can support and who are pairing the turbo with a top-mount manifold.
What It Does
This turbo is built to support serious power on the SR20DET, KA24, RB, and JZ platforms. The dual ball bearing center section spools the turbo quicker and more efficiently than a journal bearing design, which means better throttle response and less lag. The billet compressor wheel is stronger than a cast wheel and moves air more efficiently, supporting the 500 to 750 horsepower range the turbo is rated for.
The 0.82 A/R T3 turbine housing is sized to balance spool and top-end flow on the larger displacement engines this turbo targets, and the 90mm V-band discharge flange makes downpipe fabrication and servicing straightforward compared to a bolt-flange connection.
Why Dual Ball Bearing and Billet
The two construction features that matter most on this turbo are the dual ball bearing center section and the billet compressor wheel.
Dual ball bearing turbos spool faster than journal bearing units because the ball bearings reduce friction in the rotating assembly, letting the turbine come up to speed quicker. The result is better response and less lag, which is a real difference you feel on the street and on track. The ball bearing design also handles thrust loads better, which improves durability on a hard-driven build.
The billet compressor wheel is machined from a solid billet of aluminum rather than cast. Billet wheels are stronger, handle higher boost and RPM without failure, and can be machined with more aggressive blade geometry for better efficiency. On a turbo targeting up to 750 horsepower, the billet wheel is the right call for both strength and airflow.
Oil Restrictor Required (Critical)
This turbo requires an oil restrictor of .036 to .040 inch. This is not optional. Ball bearing turbos need restricted oil feed because they require significantly less oil volume than journal bearing units. Feeding a ball bearing turbo unrestricted oil pressure will overwhelm the bearing seals and push oil into the compressor and turbine housings, which shows up as smoke, oil consumption, and eventually seal failure.
ISR offers a matched oil restrictor (part number IS-OR-3036) sized for this turbo. Install the correct restrictor before running the turbo. Skipping it or running the wrong size will cause oiling problems that look like a failed turbo but are actually an installation error.
Fitment and Compatibility
The RSX3582 is designed to pair with top-mount turbo manifolds on the following engine platforms:
- Nissan SR20DET (the platform ISR's turbo line was originally built around)
- Nissan KA24DE / KA24E
- Nissan RB-series (RB20, RB25, RB26)
- Toyota JZ-series (1JZ, 2JZ)
The turbo uses a T3 turbine inlet flange, so your manifold needs to be a T3 flange top-mount design to bolt up. The 90mm V-band discharge flange requires a matching V-band outlet flange and clamp on the downpipe side. Verify your manifold flange and downpipe setup match these specs before purchasing.
Who This Is For
This turbo fits a specific build profile. If you're building an SR20DET, KA, RB, or JZ engine targeting the 500 to 750 horsepower range and running a top-mount manifold, this is the turbo sized for that goal. If you've run ISR's smaller T2 replacement turbos and want to step up to a larger frame for more power, this is the bigger sibling in the same proven line. If you want ball bearing response and billet wheel durability without paying top-tier name-brand pricing, the RSX3582 is the value play in the larger frame segment.
This is not the right turbo if you're targeting modest power on a mostly stock engine (a smaller frame turbo will spool quicker and suit that build better), if you're running a bottom-mount or log-style manifold that doesn't match the T3 flange, or if your fuel system, engine internals, and tune aren't built to support power in this range.
Required and Recommended Supporting Parts
To run this turbo correctly, you'll need the matching oil restrictor and the V-band hardware for the discharge flange. ISR offers all of these as matched components:
- Oil Restrictor (IS-OR-3036) — required for proper ball bearing oiling
- Drain Flange (IS-GTDRN) — GT-style oil drain flange to match the center section
- Outlet Flange (IS-FLA-090MM) — 90mm V-band outlet flange for the downpipe connection
- V-Band Clamp (IS-CL-090MM) — 90mm V-band clamp to secure the discharge connection
Installation Notes
Professional installation and tuning are strongly recommended. This is a high horsepower turbocharger that must be installed as part of a complete, properly supported build. Before running the turbo, confirm the correct oil restrictor (.036 to .040 inch) is installed in the oil feed line, the GT-style drain flange is connected with proper drainback to the oil pan, and the water-cooling lines are plumbed and bled. The turbo must be tuned to your specific engine, fuel, and boost target. Running a turbo of this size on an untuned or inadequately fueled engine is the fastest way to damage it or the motor.
Product Details
Brand: ISR Performance
Product: RSX3582 Turbocharger
Part Number: IS-RSX3582-1
Horsepower Rating: 500-750 hp
Bearing Type: Dual ball bearing
Cooling: Water-cooled
Compressor Wheel: Billet, 62mm inducer / 82mm exducer
Compressor Inlet: 4 inch
Compressor Outlet: 2.5 inch
Turbine Wheel: 68mm inducer / 62mm exducer
Turbine Housing: 0.82 A/R, T3 inlet flange
Discharge Flange: 90mm V-band
Drain Flange: GT style
Oil Restrictor: REQUIRED, .036 to .040 inch (IS-OR-3036)
Manifold Compatibility: Top-mount T3 flange manifolds
Engine Compatibility: Nissan SR20DET, KA24, RB20/25/26, Toyota 1JZ/2JZ
Recommended Supporting Parts: IS-OR-3036 (oil restrictor), IS-GTDRN (drain flange), IS-FLA-090MM (outlet flange), IS-CL-090MM (V-band clamp)
Key Benefits: Dual ball bearing for quick spool and strong response, billet compressor wheel for strength and efficiency, 500-750 hp capability, water-cooled durability, pairs with top-mount manifolds across SR, KA, RB, and JZ platforms