Genesis G70 3.3TStage 1 to Stage 4 tuning guide

What we'd do

For a G70 3.3T in Israel we would build a careful Stage 1. LAP3's Stage 1.0 claims 380–460 whp on US 91 and Stage 1.5 410–480 whp on US 93, against 310–330 whp stock. That is a big jump for software and plugs, and it needs no parts that require approval.

Which tune depends on the car. These are personal imports, so check the model year and market first. Most tuners support 2018–2023 cars. LAP3 lists G70s up to 2026, but asks owners of non-US and non-Canadian cars to contact it first. The JB4 ($799) works on a locked computer and comes off again. A flash tune ($495–$1,500) is the better base if you plan to go further.

Buy in this order: new plugs (Burger calls spark blow-out a known issue even at stock boost), then the tune, then the gearbox side. That means a TCU tune ($150–$1,250) and a transmission cooler, which Burger “strongly suggests” for hot climates. Expect about $650–$2,750 for tune and TCU, plus plugs and the cooler, before shipping and tax.

What we would skip: catless downpipes, which won't pass the test and can make the engine smoke, and methanol-dependent files. Stage 2 adds about 50 whp, and its top end needs methanol injection. Above about 480–500 whp the head bolts become the issue, so Stage 3 means head studs too.

Tuning it in Israel

New price in Israel

The 3.3T was never sold new here. When Colmobil launched the G70 in May 2021 it brought only the 2.0 turbo (245 hp), at ₪298,000 (Luxury) and ₪339,000 (Sport) (icar, 26 May 2021). Genesis Israel doesn't currently list the G70, so a 3.3T here is a personal import. We found no dated price for one.

Parts from abroad

At the Bank of Israel representative rate of 26 October 2026 ($1 = ₪3.078), with the Tax Authority's combined 40.66% for car parts and car electrical devices above $75 (see importing parts):

• Burger JB4 $799 × 3.078 = ₪2,459, plus 40.66% = about ₪3,459 (₪1,000 tax).
• BMS intake $379 × 3.078 = ₪1,167, plus 40.66% = about ₪1,641 (₪474 tax).

Add shipping before the 40.66%. A set of six plugs may stay under $75, which is tax-free if shipping is charged separately. A TCU tune file has no import tax, but some tuners want the computer sent to them.

Fuel

US 91 is about Israeli 95, and US 93 about 98. LAP3's Stage 1.0 needs 91+ and its Stage 1.5 93+, so on 98 you can run the 1.5 file. The JB4 needs at least US 91. Owners advise running the highest octane you can: fuel below what the map was written for is the dangerous mistake. Methanol and E30 aren't sold at Israeli stations. See 95 vs 98.

Regulation 380 and the test

Under Regulation 380 a special exhaust and accessories the maker didn't design are a change of structure. Downpipes, intakes or an intercooler need a certified part, a licensed installer and the change recorded in the licence. Catless downpipes won't pass the annual test. The V6 has primary and secondary downpipes, so check what a kit replaces. A personal-import car also has to match what is recorded for it at licensing.

Where to get it done

Our list of Israeli dealers comes from the brands' own dealer pages, and it has no entry for the tuners and parts makers in this guide (LAP3, Burger, SleepyTuned, Tork and others). Work with them remotely or with a shop that knows the Stinger's 3.3. See tuning in Israel.

Prices and rules checked 2026-10-28.

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

What owners ask

Do I need new spark plugs even at Stage 1?

Yes. A long-running thread on the Kia Stinger forum (same engine) starts with an owner who had to close his plug gap to 0.025 inch to run a JB4. It advises stopping the tune and checking plugs and coils at the first misfire. Burger says the 3.3 is prone to spark blow-out and suggests new plugs if yours have over 25,000 miles. LAP3 requires HKS M45iL plugs gapped to 0.026–0.028 inch for all its tunes.

Sources: Kia Stinger forum: helpful pointers for installing tunes, Burger Motorsports: G70 3.3 JB4, LAP3: Stinger and G70 3.3T tune

Can a 2024 or newer G70 3.3T be tuned?

It is harder than on earlier cars, and the tuners' pages don't agree. LAP3 lists its tune for 2022–2026 G70 3.3Ts and offers a spare computer. SleepyTuned lists 2018–2023 as supported and 2024-on cars as needing a bench flash. Burger's JB4 page lists fitment for 2018-on G70s, but ask Burger to confirm a 2024-on car before buying. For a car imported from outside the US or Canada, LAP3 asks you to contact it first.

Sources: LAP3: Stinger and G70 3.3T tune, SleepyTuned: G70 ECU tune, Burger Motorsports: G70 3.3 JB4

How far will the stock turbos go?

On the Kia Stinger forum, owners asking about hybrid turbos were told the stock turbos reach 500+ whp. They also said the stock fuel system runs out at around the same point, and that reliability gets harder past 600 whp. LAP3's figures agree: Stage 2.5 on the stock turbos tops out at 460–530 whp, but only with methanol injection or high-octane fuel. LAP3 wants head studs and block thread reinforcement from about 500 whp.

Sources: Kia Stinger forum: hybrid turbos for the 3.3, LAP3: Stinger and G70 3.3T tune

Do I need a transmission cooler in a hot climate?

For a tuned car in Israel, we would fit one. Burger says it strongly suggests its cooler for any Stinger or G70 running more than stock power. It also recommends one for warm climates, because heat is what wears out automatic gearboxes. Burger gives no temperature figures, so treat the gain as the maker's claim. The cooler fits 2018-on G70s with the 3.3 or 2.0 turbo.

Sources: Burger Motorsports: BMS transmission cooler

Will a tuned 3.3T last past 100,000 miles?

Nobody has real data. When a Stinger owner asked this on the forum, the replies were all opinion. A mild tune on good fuel was thought likely to be fine, and an aggressive map probably not. One member whose car lasted had forged rods and extra oil and transmission coolers. Our reading: stay at Stage 1, keep the plugs fresh, fit the gearbox cooler and use the highest octane you can buy.

Sources: Kia Stinger forum: tuned Stinger reliable beyond 100k miles?