Toyota GR Supra A90Stage 1 to Stage 4 tuning guide

What we'd do

On a 2021-on Supra, Stage 1 with a bigger heat exchanger is where we would stop for a road car. bootmod3's Stage 1 claims up to +22% on US 91 octane, about 466 hp from 382, and +25% on 93, about 478 hp. Stage 2 adds only 11–15 hp on the same fuels (about 481 and 489 hp), and the downpipe it needs has to be catted and approved in Israel. A 2020 car starts from the earlier 335 hp engine, so its numbers are lower.

We would pick bootmod3: $595 with one map or $645 with all of them, maps for both Israeli fuels, and it goes back to stock. EcuTek is the platform for big-turbo and flex-fuel builds, which E85-free Israel doesn't need at Stage 1. Before paying, have the shop read your engine computer. Many cars need a bench unlock first, and that costs extra.

Order of buying: the unlock check, then the tune, then the heat exchanger, then gearbox software. The A90 cools its charge air with water, and the guide calls a bigger exchanger strongly recommended at Stage 1; in an Israeli summer we agree. CSF's is $699 and Mishimoto's $749.95. The ZF 8-speed is the part to watch: its stock torque limits hold a tuned engine back, and at Stage 3 power it starts to slip.

What we would skip: catless downpipes, the E30 maps (no ethanol at Israeli pumps) and the carbon intakes, which the guide rates as a small gain. Budget for Stage 1: about $1,294 for bootmod3 with one map and the CSF heat exchanger, before the unlock, shipping, tax and fitting.

Tuning it in Israel

Price in Israel

Toyota's Israeli importer, Union Motors, doesn't sell the GR Supra. Its site, toyota.co.il, lists 14 models in November 2026 and the Supra isn't one of them, and in March 2018 Union told auto.co.il it had no plans to sell the car here. Any Supra in Israel comes through personal or parallel import, and we found no dated Israeli price to quote.

Parts from abroad

Hardware is taxed. At the Bank of Israel representative rate of 26 October 2026 ($1 = ₪3.078), with the combined 40.66% for car parts above $75 (see importing parts):

• CSF heat exchanger $699 × 3.078 = ₪2,151.52, plus 40.66% = about ₪3,026 (₪875 tax).
• Mishimoto heat exchanger $749.95 × 3.078 = ₪2,308.35, plus 40.66% = about ₪3,247.

All before shipping, which is taxed too. bootmod3 and xHP are licences you buy online, so there is no part to clear through customs. Downpipes and exhaust parts also need an approval before they can be imported.

Fuel

Israel sells 95 and 98, roughly US 91 and 93. bootmod3 lists separate maps: Stage 1 is up to +22% on 91 and +25% on 93, Stage 2 +26% and +28%. So on 95 expect about 466 hp at Stage 1 and 481 hp at Stage 2, and run 98 for about 478 and 489 hp. Never run 95 on a map written for 93. The E30 maps, the top figures in the guide, need a 30% ethanol blend that Israeli pumps don't sell. See 95 vs 98.

Regulation 380 and the test

The Road Safety Authority reads Regulation 380 as covering engine software, so record the tune like any other change (how approval works). The Ministry's list names a special exhaust and special wheels outright: on this build the downpipe and any cat-back, such as the Akrapovič slip-on, need a part with a lab prototype certificate, fitted by a licensed installer and recorded in the licence. A catless downpipe fails the annual test, and passing the test doesn't make an unapproved change legal. A bigger turbo at Stage 3 needs approval too. Fixed noise fines are ₪250, or ₪350 for driving without an effective silencer.

Where to get it done

From the dealer pages of brands in this guide: EcuTek lists Top RPM (Holon); xHP lists Max Tuning (Petah Tikva), HI-LED Workshop (Kfar Saba) and HLC Performance (Kafr Kana); Akrapovič lists Frontech (Tzur Yigal); bootmod3 lists MB Autosport (Kafr Kana) and Shenhav Motors (Ramat HaSharon). These are the brands' own lists, checked October 2026; we have no link with any of them. Ask each one whether it has done a Supra before.

Prices and rules checked 2026-11-10.

Also useful: tuning shops in Israel, the import tax calculator and the annual test checklist.

What owners ask

Are bootmod3's off-the-shelf maps safe, or do I need a custom tune?

An owner coming from Subarus asked this on SupraMKV in 2022, and the replies were reassuring. Owners reported months to years on off-the-shelf Stage 1 and Stage 2 maps on 91, 93 and ethanol blends without tune-related trouble; one had covered over 12,000 miles. A reply explained that these maps are written conservatively from data on many cars, and that a custom tune is for a bigger turbo, methanol or more power than the maps give. One owner said his 93 map hit the gearbox's torque limits, so he stayed on 91.

Sources: SupraMKV: Calling BM3 tuned Supra owners (2022), bootmod3: bootmod3 for the A90 Supra now available

The dealer wants to update the software. Will that lock my engine computer?

It can. In the same 2022 thread an owner asked whether a dealer software update would re-lock a 2020 car that could be flashed over OBD, and a reply said yes, it would need a bench unlock again; that owner had turned the update down on a warranty visit. MODE, which sells a mail-in unlock, warns that a dealer update can re-lock the computer in person or remotely, and that its service doesn't take computers built from June 2020. Bear in mind the update may be a recall: PistonHeads lists an engine software recall for cars built April 2019 to June 2021.

Sources: SupraMKV: Calling BM3 tuned Supra owners (2022), MODE: bench unlock service for the Supra, PistonHeads: GR Supra used buying guide (2022)

bootmod3, EcuTek or MHD: which one?

A 2020 SupraMKV thread asked exactly this. Owners said the platforms don't compare directly: bootmod3 has ready maps, a good app and a lower price, while EcuTek has no off-the-shelf maps and is custom tuning only, which costs more. One owner who had tried both and a JB4 felt EcuTek drove better; a tuner replied that power depends on who writes the map, not the platform. Owners who wanted flex fuel leaned to EcuTek. For a Stage 1 car on 95 or 98, the off-the-shelf route is enough.

Sources: SupraMKV: BM3 vs Ecutek (2020)

Do I need xHP gearbox software with the engine tune?

When xHP came out for the Supra in 2022, owners on SupraMKV split. One worried that raising the gearbox's torque limits would wear it out; others answered that the higher clamping force means less slip, and that owners of the same ZF gearbox in BMWs had run xHP's Stage 3 with tuned engines for years. An early user said daily driving felt smoother and manual shifts faster. xHP says its Stage 1 removes the factory torque limiters, and it lists the G-series and Supra licence at $549.99. We would add it once the engine map runs into those limits.

Sources: SupraMKV: XHP reviews and feedback (2022), xHP Flashtool

What does a Stage 1 remap really give on a European car?

PistonHeads' 2022 buying guide gives the European car 340 hp, says some UK tuners measured about 370 hp on stock cars, and reports Litchfield's 420 hp from a remap alone. In 2023 PistonHeads threads one poster said about £500 buys 420–430 hp with no other parts, and an owner said his Stage 1 car felt very quick. None of these were measured in the threads. bootmod3's own claim for 2021-on cars is up to +22% on 91, or about 466 hp from 382.

Sources: PistonHeads: GR Supra used buying guide (2022), PistonHeads: Toyota GR Supra (A90) spotted (2023), PistonHeads: In defence of the A90 Toyota Supra (2023)