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Audi RS5 B9Stage 1 to Stage 4 tuning guide

The B9 RS5 has the EA839 2.9 TFSI, a V6 with two turbos inside the V, an 8-speed ZF automatic and quattro all-wheel drive. Audi quotes 450 PS and 600 Nm, unchanged by the 2019 facelift (Audi). It belongs to the same EA839 family as the S4's 3.0 TFSI, but with two turbos instead of one, and the RS4 Avant B9 has the same engine and takes the same tunes.

Years
2018–2024 (facelift 2019)
Engine
2.9 TFSI EA839 twin-turbo V6
Gearbox
8-speed ZF automatic, quattro
Stock power
450 PS / 600 Nm (US 444 hp)

Updated

Dark blue Audi RS5 Sportback B9 parked on a city street, seen from the rear

Power by stage

Stock is Audi's figure. Stage 1 to 4 are tuners' own claims, mostly on US 93 octane, which equals 98 RON, the best fuel sold in Israel. The top of Stage 2 and all of Stage 4 need ethanol blends.

Stock450 PS
Stage 1500–525 hp Stage 2525–605 hp Stage 3590–680 hp Stage 4710–740 hp

Names with an arrow go straight to that part's product page for this car. Names in a dashed outline are other brands that make the part; exact links for them are being added.

1

Stage 1: Software only

500–525 hp

A tune on a standard car claims about 500–525 hp on pump fuel. 034Motorsport claims 514 hp and 537 lb-ft on 93 octane, the same as 98 RON (034Motorsport), IE claims 502 hp on 91 octane and 522 hp on its higher pump-fuel file (IE), and APR lists 488–550 hp depending on fuel, ethanol included (APR). Like the S4, the car has a Bosch MG1 computer that is unlocked first, then flashed through the OBD port.

Typical cost: APR Stage 1 $899.95, or $1,799.95 as APR Plus with a limited powertrain warranty.List prices, Sept 2026, before shipping, import tax and fitting.

Stage 1 tunes compared

TuneFuelClaimed powerClaimed torqueNotes
034Motorsport Stage 191 octane (95 RON)484 hp501 lb-ftStage 1 gearbox tune included
034Motorsport Stage 193 octane (98 RON)514 hp537 lb-ft—
034Motorsport Stage 1E85532 hp548 lb-ftEthanol
IE Stage 191 octane (95 RON)502 hp565 lb-ftStage 1 gearbox tune included
APR Stage 191 octane to E85488–550 hp537–606 lb-ft$899.95; APR Plus with a limited powertrain warranty $1,799.95

Parts list

  • Engine tune required APR ECU upgradeIE performance tune034MotorsportUnitronic

    Flashed through the OBD port once the computer is unlocked.

  • Gearbox (TCU) tune recommended 034MotorsportIEUnitronic

    034 and IE include their Stage 1 gearbox tunes; Unitronic's is free for its engine-tune customers on 2018–2021 cars.

Before you buyEthanol isn't sold at Israeli filling stations, so read the 93-octane rows. The RS4 Avant B9 has the same engine and the tuners list both cars, but have the tuner check your car's computer version first.
2

Stage 2: Downpipes, intercooler and fuel pump

525–605 hp

On pump fuel, Stage 2 adds little to this engine. IE says the 2.9 has two efficient factory downpipes that don't restrict the stock turbos, so its Stage 2 file, which needs aftermarket downpipes, claims the same figures as Stage 1 (IE). The real step is fuel: with an upgraded high-pressure fuel pump and ethanol, 034's Stage 2+ claims 566 hp and 610 lb-ft (034Motorsport), and IE's Stage 1 Plus 604 hp and 660 lb-ft.

Typical cost: APR high-pressure fuel pump (2.9T and 3.0T) $1,499.95.List prices, Sept 2026, before shipping, import tax and fitting.

Stage 2 packages compared

PackageFuelClaimed powerClaimed torqueRequired hardware
IE Stage 291 octane and up502–522 hp565–572 lb-ftAftermarket downpipes; same power as Stage 1
034Motorsport Stage 2+E85566 hp610 lb-ftUpgraded fuel pump, racing catalysts, Wagner intercooler
IE Stage 1 PlusEthanol604 hp660 lb-ftUpgraded fuel pump

Parts list

  • High-pressure fuel pump required APR HPFP (2.9T and 3.0T)034MotorsportIE

    Needed for the ethanol files; APR's pump is $1,499.95, and 034's upgrade uses a 37% larger piston.

  • Intercooler recommended Wagner TuningIE

    034's Stage 2 package includes Wagner Tuning's competition intercooler.

  • Downpipes or racing catalysts optional 034MotorsportIEUnitronic

    034's Stage 2 package uses its stainless-steel racing catalyst set.

  • Intake optional APR intake system034MotorsportUnitronicEventuri

    APR measured 19 whp more from its intake on a Stage 1 (93 octane) RS5.

Before you buyRacing catalysts and downpipes are motorsport parts and need approval at Israeli inspection. Without ethanol, which Israeli filling stations don't sell, Stage 2 makes about the same as Stage 1.
3

Stage 3: Hybrid turbos in the factory positions

590–680 hp

Stage 3 replaces both turbos with hybrids that bolt into the factory positions. 034's Stage 3 with The Turbo Engineers' TTE720 turbos claims 536 hp on 91 octane, 590 hp on 93 and 680 hp on E85 (034Motorsport). Its Stage 3 package adds 4-bar MAP sensors, its fuel pump upgrade, racing catalysts and the Wagner intercooler (the package), and 034 requires at least its Stage 1 gearbox tune.

Turbo upgrades compared

KitFuelClaimed powerClaimed torqueNotes
034Motorsport Stage 3 TTE72091 octane (95 RON)536 hp546 lb-ft—
034Motorsport Stage 3 TTE72093 octane (98 RON)590 hp596 lb-ftThe figure for Israeli 98
034Motorsport Stage 3 TTE720E85680 hp665 lb-ftEthanol

Parts list

  • Hybrid turbos required TTEPure Turbos

    TTE720s in 034's package; IE uses Pure800s (Stage 4).

  • MAP sensors required 034Motorsport

    4-bar sensors are part of 034's Stage 3 package.

  • High-pressure fuel pump required APR034MotorsportIE

    Part of 034's Stage 3 package.

  • Gearbox (TCU) tune required 034MotorsportIE

    034 says its Stage 1 gearbox tune is required, and its Stage 3 tune optimises the shift points.

Before you buyChanged turbos aren't road-legal in Israel without approval. On Israeli 98, read the 93-octane figure: 590 hp.
4

Stage 4: Bigger hybrids and ethanol

710–740 hp

The top builds run ethanol. 034's TTE720 car claims 713 hp on E60–E70 (034Motorsport), and its development RS5 was the first RS5 to run a 9-second quarter mile, on TTE720s and an ethanol file (Audi Club North America). IE's Pure800 hybrid turbos with its Stage 3 engine and gearbox tunes claim up to 741 hp and 688 lb-ft, from 444 hp stock; the pair costs $3,995 and needs IE's turbo inlet pipes and fuel pump upgrade (IE).

Typical cost: IE Pure800 hybrid turbos $3,995 for the pair.List prices, Sept 2026, before shipping, import tax and fitting.

Big-turbo builds compared

BuildFuelClaimed powerClaimed torqueNotes
034Motorsport Stage 3 TTE720E60–E70713 hp679 lb-ftEthanol blend
IE Stage 3 with Pure800—up to 741 hp688 lb-ft$3,995 for both turbos

Parts list

  • Hybrid turbos required IE Pure800 twin turbosTTE

    IE sells the Pure800s as complete turbos, so no cores are needed.

  • Ethanol content sensor recommended APRIE

    APR recommends one to make sure the ethanol content is right.

  • Gearbox upgrades optional 034Motorsport

    034's record car also ran its billet transmission insert.

Before you buyEthanol blends aren't sold at Israeli filling stations, so these figures aren't reachable on pump fuel here; on 98, plan around Stage 3's 590 hp. Buy the engine and gearbox tunes from one tuner.

Where to buy

OBDeleven's plug-in reader and app offer one-click customisations for Volkswagen-group, BMW, Toyota, Ford and Mercedes-Benz cars. ECS Tuning is a US parts shop that stocks several of the brands in this guide and takes international orders; import tax and duties are charged on delivery. It lists US-market fitments. Check the fit for your car and the shipping cost before you order. We earn a commission on orders through these links, at no extra cost to you (how the site makes money).

Quick answers

How much horsepower does a stock Audi RS5 B9 have?
450 PS from the factory.
How much hp does a Stage 1 Audi RS5 B9 make?
Tuners claim 500–525 hp at Stage 1, up from 450 PS stock (Stage 1 options).
How much hp does a Stage 2 Audi RS5 B9 make?
Tuners claim 525–605 hp with a Stage 2 file and the parts it needs (parts list).
How much hp does a Stage 3 Audi RS5 B9 make?
Tuners claim 590–680 hp at Stage 3: hybrid turbos in the factory positions (Stage 3 parts).
How much hp does a Stage 4 Audi RS5 B9 make?
Stage 4 is the top of the ladder for this car: bigger hybrids and ethanol. The biggest builds claim 710–740 hp. Check which fuel each figure needs: Israel sells 95 and 98 octane only (Stage 4).
How much does a Stage 1 Audi RS5 B9 cost?
List prices: APR Stage 1 $899.95, or $1,799.95 as APR Plus with a limited powertrain warranty.

Watch: real builds

From tuners', shops' and motoring journalists' own YouTube channels. Nothing loads from YouTube until you press play.

0:49
Stage 1APR's Stage 1 for the RS5's 2.9 TFSIAPR on YouTube
4:15
Stages 1–2034Motorsport on why it doesn't make a Stage 2 for the RS5034Motorsport Uncut on YouTube
14:44
Stage 2Wagner Tuning fits its competition intercooler to an RS4 B9Wagner Tuning on YouTube
12:22
Stage 3034Motorsport on its Stage 3 software for TTE720 turbos034Motorsport on YouTube
0:27
Track test034Motorsport's TTE720 RS5 runs 9.84 seconds in the quarter mile034Motorsport on YouTube

All build videos, by car

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Questions to ask the shop

  1. Which computer version does my car have, and do you have a file for it?
  2. Can you unlock the Bosch MG1 computer through the OBD port, or does it have to be removed and sent away?
  3. Is the file written for 98 octane, and what does it make on 95?
  4. Is a gearbox (TCU) tune included, and which stage do I need?
  5. Does the tune keep the catalysts working, so the car passes inspection?
  6. What does it do to my warranty, and do you offer your own powertrain cover?

Compare side by side: Audi RS5 B9 vs Audi S4 B9 · Audi RS5 B9 vs BMW M3 / M4 G80 / G82 · Audi RS5 B9 vs Mercedes-AMG C63 W205

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