The Z32 300ZX Twin Turbo buried its Garrett T25s so deep in the engine bay that nobody wants to pull them twice, and the Z31 before it is now a 40-year-old survivor platform. Boost Lab, Inc. rebuilds the whole VG30 turbo story: the Z31's single Garrett units, and the Z32's side-specific, transmission-specific twins in the 14411-40P family with Nissan service sets 14411-RE1MT and RE1AT. Do it once, do it right, put the plenum back on. Nationwide ship-in service.
Two generations, three turbo configurations, and one critical rule on the Z32: the twins are side- and transmission-specific.
The first 300ZX Turbo ran a single Garrett T3 on the SOHC VG30ET, 200 hp and famously durable. Forty years on, these cores arrive with classic age wear: bearing play, hardened seals, coked centers from 80s oil habits. Simple, honest hardware that rebuilds to better than new.
The late Z31 moved to a smaller, faster-spooling Garrett T25-family unit, trading top-end for response, 205 hp and a noticeably livelier street car. The tag tells the two Z31 generations apart instantly; send photos if the car's history is murky.
The 300 hp Z32 runs two water-cooled Garrett T25s, TB2211 series, catalog 466083 family, in one of the tightest engine bays ever sold in America. OEM numbers run the 14411-40P series: 40P06 (right, automatic, to 5/90), 40P09 (right, automatic, from 5/90), 40P13, 40P16 and siblings, with left, right, manual and automatic all carrying distinct numbers.
Manual and automatic Z32s run different turbo specifications, which is why Nissan serviced them as distinct sets: 14411-RE1MT for manual cars and 14411-RE1AT for automatics. Mixing them works mechanically and wrongs the calibration. Match the set to the transmission, always.
Z32 turbo replacement is a legendary job: engine bay clearances measured in millimeters, and many owners drop the engine or pull the plenum entirely. That labor bill is exactly why the turbos that go back in must be right. We rebuild the pair, balance both assemblies, and pressure-test the water-cooled centers so the job happens once.
Three decades of Z32 tuning means countless cars run upgraded twins on the stock frame or aftermarket kits. We rebuild the common upgrade families and balance every assembly; send tag and wheel photos through the repair form before shipping.
On a Z32, the labor to reach the turbos dwarfs the turbos themselves, and the twin that did not fail has lived the same 30 years as the one that did. Rebuild both, and replace the coolant and oil hard lines and banjo bolts while everything is apart: crushed washers, clogged banjo screens and brittle lines are how fresh twins die young. If your Z32 is apart right now, this is the moment to do everything once.
Verified Nissan OEM numbers and Garrett designations for the 300ZX. The 14411-40P family is side-, transmission- and date-specific: the tag governs. Search by any number.
| Turbo PN | Model | OEM PN | Application | Notes |
|---|---|---|---|---|
| 466083 family | Garrett T25 / TB2211 | Nissan 14411-40P16 | Z32 Twin Turbo VG30DETT | Garrett reman-channel catalog number |
| Tag-specific | Garrett T25 / TB2211 | Nissan 14411-40P06 | Z32 right side, automatic, to 05/1990 | Early AT right unit |
| Tag-specific | Garrett T25 / TB2211 | Nissan 14411-40P09 | Z32 right side, automatic, from 05/1990 | Later AT right unit |
| Tag-specific | Garrett T25 / TB2211 | Nissan 14411-40P13 | Z32 Twin Turbo | OEM service unit in the 40P family |
| Set number | Twin set, manual trans | Nissan 14411-RE1MT | Z32 Twin Turbo, manual cars | Nissan service set for MT calibration |
| Set number | Twin set, automatic trans | Nissan 14411-RE1AT | Z32 Twin Turbo, automatic cars | Nissan service set for AT calibration |
| Tag-specific | Garrett T3 | Nissan 14411 series, verify by tag | 1984-1987 Z31 VG30ET single turbo | 200 hp SOHC cars |
| Tag-specific | Garrett T25 family | Nissan 14411 series, verify by tag | 1988-1989 Z31 VG30ET | Smaller, faster-spooling late Z31 unit |
| Tag-specific | GT25/GT28-class hybrids | n/a (upgrade) | Upgraded Z32 twins on stock frame | Rebuilt and balanced as a pair |
Tight packaging, water-cooled centers, and three decades of heat: the VG30 patterns.
The Z32's turbo oil lines run through one of the hottest engine bays Nissan ever built, and the banjo fittings clog with coked oil until the twins starve. A rebuilt pair installed on 30-year-old lines is a wasted rebuild. Lines and banjos get replaced with the turbos, every time.
The Z32 bay traps heat, and hot shutdowns bake the oil in both center sections. We clean CHRA passages to bare metal and pressure-test the water jackets on every Z32 rebuild; the idle-down habit protects the fresh bearings afterward.
Forty-year-old Z31 units arrive with shaft play, whine and oil consumption, the standard survivor presentation. Caught before wheel contact, these simple units rebuild routinely.
A failing Z32 twin sheds oil and debris into shared plumbing, and its partner ingests the consequences. Replacing one side leaves a compromised survivor buried under all that labor. We assess and rebuild the pair, and tell you honestly what the second unit actually needed.
Z cars sit. Storage hardens seals, and the first spring pull smokes. Startup smoke that clears points at seals, and the core underneath is usually excellent.
Thirty years of boost controllers on the stock twins overworks the thrust bearings until the wheels walk. Uprated thrust parts are standard on our performance Z32 rebuilds, with an honest conversation about the stock frame's limits.
Yes, it is the single most important detail. Nissan serviced the twins as transmission-specific sets, 14411-RE1MT for manuals and 14411-RE1AT for automatics, and the units themselves carry distinct 40P-series numbers by side and build date. Send tag photos and the transmission type with your submission.
Given what it takes to reach them, yes. The second twin has lived the same life as the failed one, and doing the job twice costs far more than rebuilding the pair once. We will tell you honestly if the second unit genuinely only needed seals.
Turbo oil and coolant hard lines, banjo bolts and washers, and the oil feed screens. These are the components that kill fresh twins, and the labor to reach them is already paid.
No. The Z31 runs a single turbo on the SOHC VG30ET, in two generations (T3 through 1987, smaller T25-family unit for 1988-1989), while the Z32's DOHC VG30DETT runs side-specific water-cooled twins. Nothing crosses between them.
Yes, the common GT25 and GT28-class hybrid families on the stock frame all rebuild, balanced as a pair. Send tag and wheel photos first so we can confirm parts.
Start at repair.theboostlab.com, note manual or automatic and label left and right units, drain the oil and coolant passages, cap the openings, and double-box. Ship to Boost Lab, Inc., 37833 Pineapple Ave, Unit A, Dade City, FL 33523.