911 Carrera S991.1 tuning
The 911 Carrera S (991.1) uses a naturally aspirated 3.8 flat-six rated at 395 hp and 325 lb-ft from the factory. Without turbos, gains are smaller: about 12 hp at Stage 1. Most owners tune it for sharper throttle response, a stronger top end and sound.
| Stage | Power | Torque | Gain | % |
|---|---|---|---|---|
| Stock | 395 hp | 325 lb-ft | — | — |
| Stage 1 | 407 hp | 334 lb-ft | +12 hp | +3% |
| Stage 2 | 425 hp | 341 lb-ft | +30 hp | +8% |
| Stage 3 | 452 hp | 350 lb-ft | +57 hp | +14% |
- Stage 1
Software · 407 hp
ECU recalibration of ignition, cam timing and throttle mapping. No hardware changes.
- Stage 2
Software + bolt-ons · 425 hp
Stage 1 plus an emissions-legal intake and cat-back exhaust, with a calibration written for them.
- Stage 3
Intake package · 452 hp
An upgraded intake plenum and further calibration, with the factory catalytic converters kept. Offered only where an emissions-legal kit exists for your car.
Estimates for planning, not measured results. Stock figures are Porsche's factory crank ratings. Your car's numbers come from its own baseline and after-logs.
The 9A1 DFI
engine.
The 9A1 direct-injection flat-six has no IMS bearing. Direct injection can leave carbon on the intake valves over time, which we check before tuning. Being naturally aspirated, it gains less than a turbo engine, and most of the benefit is in throttle response and the top end.
Every 911 Carrera S tune starts with a consult and a baseline log of your car as it sits. We confirm its software version is supported before we quote, and you leave with after-logs and a signed job file. Read our step-by-step tuning guide.
Emissions-legal parts and software only. We keep the factory catalytic converters on every car. If a stage isn't available legally for your exact model and software, we tell you at the consult instead of fitting it.
How much power does a Stage 1 tune add to a 911 Carrera S (991.1)?
Our Stage 1 estimate for the 911 Carrera S (991.1) is about +12 hp and +9 lb-ft, taking it from 395 hp to roughly 407 hp. Stage 2 is estimated at 425 hp and Stage 3 at 452 hp. Your car's real result is confirmed with before-and-after logs.
What should be checked on a 911 Carrera S (991.1) before tuning?
The 9A1 direct-injection flat-six has no IMS bearing. Direct injection can leave carbon on the intake valves over time, which we check before tuning. Being naturally aspirated, it gains less than a turbo engine, and most of the benefit is in throttle response and the top end.
Is a 911 Carrera S (991.1) tune emissions-legal?
At Redline Exotics, yes. We use emissions-legal parts and software only and keep the factory catalytic converters. If a stage is not available legally for your 911 Carrera S's software version, we tell you before quoting.
Request a tuning consult
Usually answered the same day.