Parts graph
SR20DET
The SR20DET is the definitive S-chassis turbo four: a T25-flanged, side-feed-injected platform whose stock bottom end is happy to ~400whp, with a deeply mapped upgrade ladder (Z32 MAF, Nistune, 740cc injectors, front-mount) that carries a street car to 350-450whp cheaply. Past that, the recipe is well known — top-feed fuel conversion, forged pistons and rods, a modern G-series turbo, and a standalone ECU — which is exactly where the compatibility graph earns its keep.
Compatibility intel 16 edges
The rules that make combinations work — or not. This is the knowledge that used to live in dead forum threads.
- DeatschWerks 740cc Side-Feed Injectors (set of 4)requiresWalbro GSS342 255lph In-Tank Pump740s lean out on the stock 130lph pump above ~300whp; a 255lph pump is the floor for any SR20 injector upgrade
- Injector Dynamics ID1050X (set of 4)requiresRadium Engineering Top-Feed Fuel Rail ConversionThe SR20DET's side-feed rail cannot physically accept top-feed ID1050X bodies — the Radium conversion rail is mandatory
- Injector Dynamics ID1050X (set of 4)requiresWalbro GSS342 255lph In-Tank Pump1050cc of injector is worthless if supply collapses; a 255lph pump minimum keeps rail pressure flat at high duty cycle
- SR20DETconflictsDeatschWerks 740cc Side-Feed Injectors (set of 4)The stock ROM cannot rescale for 740cc — it dumps fuel, fouls plugs, and idles like a diesel without Nistune or a standalone
- Nissan Z32 300ZX MAF (80mm)unlocksDeatschWerks 740cc Side-Feed Injectors (set of 4)The Z32 card's extended metering range lets a ROM tune rescale the K-constant for 740s without pegging 5.12V
- Nistune Type 4 Board + LicenserecommendsNissan Z32 300ZX MAF (80mm)The stock SR20 MAF maxes out near 260whp; Nistune tunes almost always pair the Z32 card for metering headroom
- Tomei ARMS MX7960 Bolt-On TurborecommendsNistune Type 4 Board + LicenseA 400whp bolt-on turbo still needs fuel and timing control; Nistune keeps the factory ECU and is the classic budget-correct pairing
- Garrett G25-550 (T25 turbine kit)recommendsMishimoto Front-Mount Intercooler KitThe factory side-mount heat-soaks badly past ~300whp; a front-mount keeps intake temps stable at G25 boost levels
- Garrett G25-550 (T25 turbine kit)recommendsLink G4X S14/S15 Plug-In ECUMAF-based tuning gets ugly with big compressors and recirc plumbing; the Link runs speed density and makes G-series tuning painless
- Garrett G25-660 (V-band 0.72 A/R)requiresInjector Dynamics ID1050X (set of 4)550whp needs roughly 1000cc at sane duty cycle on pump gas — 740cc injectors are tapped out by ~450whp
- CP Pistons + Manley H-Beam Rods PackageunlocksGarrett G25-660 (V-band 0.72 A/R)Stock cast pistons and rods are the SR20's known grenade point past ~400-450whp; forged internals clear the path to the 550whp tier
- Garrett G25-660 (V-band 0.72 A/R)recommendsKoyorad Hyper V 36mm Aluminum RadiatorSustained big boost through a 25-year-old copper core invites heat soak; the Koyo holds coolant temps under track load
- Garrett G25-550 (T25 turbine kit)requiresACT HD Pressure Plate + Street Disc KitThe OE clutch starts slipping around 250 ft-lb; the ACT HD holds 440 ft-lb, which covers G25-550 torque with margin
- Z32 300ZX 4-Piston Front Brake ConversionrecommendsRays Volk Racing TE37 17x9 +22 (set of 4)Z32 30mm-piston calipers will not clear most 15in wheels; a 17in TE37 clears with room for track pads and ducting
- Tomei ARMS MX7960 Bolt-On TurborecommendsTomei Expreme Ti Titanium CatbackThe SR responds hard to a free-flowing 80mm exhaust — expect faster spool and 15-20whp over a crush-bent system
- Garrett G25-550 (T25 turbine kit)recommendsNismo GT LSD Pro 2-Way450whp through an open diff or tired VLSD is one-tire fire; a proper 2-way puts power down and makes drift transitions predictable
Manufacturer application charts 6 records
Fitment straight from the manufacturers’ current application pages — chart-level ground truth for this platform.
- PS13RPS13S14S15
The current application page states (R)PS13/S14/S15.
- PS13RPS13S14S15
Application table lists PS13, RPS13, S14 and S15.
- PS13RPS13S14S15
The application table lists 180SX RPS13 and Silvia PS13/S14/S15; part number varies by kit step.
- S14S15BNR32BCNR33BNR34AP1
Extracted only requested-engine applications from the current Hipermax S list.
- BNR32BCNR33BNR34PS13RPS13S14S15
Manufacturer chart separates RB26 and SR20 intake/exhaust applications by engine and chassis generation.
- S15AP1FD3SCN9ACP9A
Requested chassis extracted from the official application PDF; engine codes are not asserted in that chart.
Turbo & power
Tomei ARMS MX7960 Bolt-On Turbo
Tomei
Drop-in T25-flange journal-less ball bearing turbo; the modern replacement for the classic 2871 street tier with near-stock spool
Garrett G25-550 (T25 turbine kit)
Garrett
Mid-frame G-series that makes GT30 power with GT28 response; needs oil/coolant line rework and downpipe fabrication
Garrett G25-660 (V-band 0.72 A/R)
Garrett
The big-power SR20 turbo of choice in 2026; wants a top-mount manifold, external gate, and a built bottom end to use it
Engine internals
CP Pistons + Manley H-Beam Rods Package
CP-Carrillo / Manley
86.5mm forged slugs and H-beams — the insurance policy that turns a 400whp hand grenade into a 600whp platform
Injectors
DeatschWerks 740cc Side-Feed Injectors (set of 4)
DeatschWerks
Direct drop-in for the factory side-feed rail — the standard fueling step for 300-450whp street builds
Injector Dynamics ID1050X (set of 4)
Injector Dynamics
Top-feed with published latency data tuners trust; requires a side-to-top-feed rail conversion on the SR20
Fuel system
Walbro GSS342 255lph In-Tank Pump
Walbro
The default S-chassis pump upgrade for three decades; drops into the stock hanger with minor wiring cleanup
Radium Engineering Top-Feed Fuel Rail Conversion
Radium Engineering
Converts the SR20's side-feed rail to top-feed, opening up the entire modern injector catalog plus an adjustable regulator
Engine management
Nistune Type 4 Board + License
Nistune
Real-time ROM tuning inside the factory ECU — keeps stock drivability and immobilizer; redtop S13 uses the Type 2 board instead
Link G4X S14/S15 Plug-In ECU
Link
Plug-in standalone with speed density, flex fuel, boost-by-gear, and knock control; does not itself gate power
MAF & sensors
Nissan Z32 300ZX MAF (80mm)
Nissan
The culturally mandatory SR20 metering upgrade — plug-and-play with an adapter harness and a ROM rescale
Intercooler
Mishimoto Front-Mount Intercooler Kit
Mishimoto
Bar-and-plate front-mount with full piping; needs bumper-off install and light trimming behind the support
Cooling
Koyorad Hyper V 36mm Aluminum Radiator
Koyorad
All-aluminum core that fits the stock shroud and fan; the track-day fix for tired 90s cooling
Exhaust
Tomei Expreme Ti Titanium Catback
Tomei
Full titanium, roughly half the weight of stainless, straight-through 80mm — the burnt-tip soundtrack of the platform
Clutch
ACT HD Pressure Plate + Street Disc Kit
ACT
Holds ~440 ft-lb with a pedal you can daily; the sane middle ground before twin-disc money
Drivetrain
Nismo GT LSD Pro 2-Way
Nismo
Clutch-type 2-way for the R200 — predictable lock on and off throttle, the reference diff for drift S-chassis
Suspension
BC Racing BR Series Coilovers
BC Racing
The default street/drift coilover: 30-way adjustable, swift-spring upgradable, rebuildable, and cheap enough to abuse
Ohlins Road & Track DFV Coilovers
Ohlins
Dual-flow valve damping that stays composed on street and grip track days alike — the serious-lap-time option
Brakes
Z32 300ZX 4-Piston Front Brake Conversion
Nissan
The classic S-chassis brake swap: Z32 30mm aluminum calipers and rotors bolt to the stock knuckles; S15 Spec-R already ships with big brakes
Wheels
Rays Volk Racing TE37 17x9 +22 (set of 4)
Rays
The forged icon in 5x114.3; S13 needs a 5-lug hub conversion to run them
Enkei RPF1 17x9 +22 (set of 4)
Enkei
The budget-forged-adjacent track wheel — a third the price of TE37s at nearly the same weight
Prices are typical 2026 USD street prices. Fitment data is community-sourced tuning knowledge, not a guarantee — verify with your tuner before ordering. Marketplace links (Yahoo Japan, UpGarage, Nengun, RHDJapan, eBay) land here next.