5.0 V8 - 423ch Tuning
Lexus IS — Detailed power and torque gains by stage.
Gains by stage(4)
Power
423 hp
Torque
520 Nm
essence
Power
423→423ch
Torque
520→520Nm
OriginalTuned
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Everything about 5.0 V8 - 423ch tuning
Tuning the 5.0 V8 - 423ch found in the Lexus IS is one of the most popular performance upgrades. This engine offers excellent potential for power and torque gains.
On ChiptuneMAP, find verified gain data for each stage, compare tuner prices and find the ideal professional for your project.
Gains summary by stage
On the Lexus IS 5.0 V8 - 423ch, tuning delivers up to +47 hp and +50 Nm depending on the stage. Stock vs tuned figures:
| Stage | Power | Torque | Indicative price |
|---|---|---|---|
| Stage 1 | 423 → 423 hp | 520 → 520 Nm | — |
| Stage 2 | 423 → 470 hp | 520 → 570 Nm | — |
| E85 Flexfuel | 423 → 423 hp | 520 → 520 Nm | — |
| E85+ | 423 → 423 hp | 520 → 520 Nm | — |
Frequently asked questions
What gains can I expect from tuning the 5.0 V8 - 423ch?
Tuning the 5.0 V8 - 423ch (Lexus IS) delivers significant power and torque gains depending on the chosen stage. Stage 1, with no hardware modifications, offers the best gain-to-reliability ratio.
Is tuning reliable on the 5.0 V8 - 423ch?
Yes, the 5.0 V8 - 423ch is known for its reliability when tuned, especially at Stage 1. It's essential to use a certified tuner with maps tailored to your engine.
How much does Lexus IS tuning cost?
Prices vary by stage and tuner. Check our directory to compare rates from professionals near you.
Should I get a tuning box or an ECU remap?
ECU remapping (modifying the engine control unit map) delivers better results and integration than a plug-in tuning box. It's customized for each engine.
How do I find a tuner for my Lexus IS?
Use the ChiptuneMAP directory to find a certified tuner near you. Compare reviews, prices and specialties.