The Audi RS6 Avant and RS7 Sportback C8 are benchmarks of the performance-meets-practicality segment. Powered by a 4.0-litre twin-turbo TFSI V8 producing 441kW and 800Nm from the factory, via the MLB Evo platform shared with the Lamborghini Urus and Bentley Bentayga, the C8 is already devastatingly fast. Those numbers are a floor, not a ceiling.
This guide is the most comprehensive resource available for Audi RS6 and RS7 C8 performance upgrades in Australia. Every product listed is stocked and supplied by ModsDirect -- Australia's authorised dealer for every brand featured. All parts come with manufacturer warranties and local technical support.
Quick navigation:
- Performance Exhaust Systems
- Intake Upgrades
- Intercooler Upgrades
- ECU Tuning and Software
- Suspension and Lowering
- Brake Upgrades
- Aerodynamics and Carbon Fibre
- Recommended Build Progression
- FAQ
1. Performance Exhaust Systems for the Audi RS6 and RS7 C8
The C8 RS6/RS7's factory exhaust is tuned for refinement, not drama. Audi's engineers deliberately suppressed the V8's natural character to satisfy noise regulations and comfort targets. An aftermarket exhaust transforms the acoustic personality of the car and improves exhaust flow for tuned applications.
Understanding OPF/GPF Variants
The C8 RS6/RS7 is sold in two exhaust configurations depending on market and model year: non-OPF and OPF/GPF variants. Choosing the correct system for your vehicle's configuration is critical. ModsDirect can confirm your variant before purchase -- contact us with your VIN.
Akrapovic
Akrapovic is the global leader in premium exhaust engineering. Every C8 system is engineered to OEM fitment tolerances, retains factory valve control, and is built from aerospace-grade titanium and stainless steel.
Slip-On Systems (Cat-Back):
- Akrapovic Exhaust System for Audi RS6 Avant/RS7 Sportback (C8) -- the definitive cat-back for standard C8 models
- Akrapovic Exhaust System for Audi RS6 Avant/RS7 Sportback Performance (C8) -- optimised for Performance Edition models
- Akrapovic Exhaust System for Audi RS6 Avant (C8) OPF/GPF -- engineered for OPF-equipped variants
Evolution Line (Full Titanium):
- Akrapovic Evolution Line (Titanium) for Audi C8 RS6/RS7 -- full titanium system, significant weight reduction, maximum sound and flow
- Akrapovic Evolution Line (Titanium) for OPF Audi C8 RS6/RS7 -- OPF-compatible Evolution Line
- Akrapovic Evolution Line (Titanium) for Audi RS6 Avant/RS7 Sportback Performance (C8)
- Akrapovic Evolution Line (Titanium) for Audi RS6 Avant/RS7 Sportback Performance (C8) OPF/GPF 2023
Downpipes and Link Pipes:
- Akrapovic Downpipe/Link Pipe Set (SS) for Audi C8 RS6/RS7 -- essential for full system builds and maximum power
- Akrapovic Link Pipe Set (SS) for Audi C8 RS6/RS7
- Akrapovic Link Pipe Set (SS) for OPF Audi C8 RS6/RS7
- Akrapovic Link Pipe Set (SS) for Audi RS6 Avant/RS7 Sportback Performance (C8) OPF/GPF 2023
Sound Kit:
- Akrapovic Sound Kit for Audi C8 RS6/RS7 -- enhances the exhaust note on the factory system without replacing it. Ideal for lease or warranty-sensitive vehicles.
Milltek Sport
Milltek Sport is one of Europe's most respected exhaust brands, with decades of Audi-specific development. Their C8 systems offer a more refined sound profile compared to Akrapovic -- a good choice for those who want improved exhaust character without maximum aggression.
- Milltek Sport Large Bore Race Downpipes -- Audi RS6/RS7 C8 and S8 D5 -- for serious power builds; removes the catalytic converters for maximum flow (track/off-road use only)
Shop: All Akrapovic Exhaust Systems | All Milltek Sport Exhaust Systems
2. Intake Upgrades for the Audi RS6 and RS7 C8
The C8's factory intake is adequate at stock power levels but becomes a restriction as power climbs. An aftermarket intake improves airflow to the twin turbos, reduces intake air temperatures (critical in Australian conditions), and adds the induction sound the V8 deserves.
Eventuri
Eventuri's carbon fibre intake systems combine purpose-built aerodynamic design with sealed airbox construction to maximise airflow and minimise heat soak. They are also the most visually impressive engine bay upgrade available for the C8.
- Eventuri Audi C8 RS6/RS7 Gloss Carbon Intake -- gloss carbon finish, dyno-proven gains
- Eventuri Audi C8 RS6/RS7 Matte Carbon Intake -- same performance, understated matte finish
- Eventuri Audi C8 RS6/RS7 TTE 888/1020 Hybrid Turbo Inlets -- engineered for high-power builds running TTE 888 or TTE 1020 hybrid turbos; required for Stage 3 applications
- Eventuri Audi C8 RS6 2023 Breather Adapter Kit -- required for 2023 model year RS6 Avant variants to ensure compatibility with Eventuri intake systems
RacingLine
RacingLine's High-Flow Panel Air Filter is the most accessible intake upgrade for the C8 -- a direct drop-in replacement for the factory filter element, no airbox modification required. Ideal for Stage 1 builds or warranty-sensitive vehicles.
Shop: All Eventuri Performance Intakes | All RacingLine Parts
3. Intercooler Upgrades for the Audi RS6 and RS7 C8
The C8's twin-turbo V8 generates significant charge air temperatures under sustained performance driving. In Australian summer conditions, heat soak in the factory intercoolers is a real and measurable power limiter. An upgraded intercooler system is essential for any tuned C8, and particularly important for owners in QLD, NSW and WA.
CSF
CSF is the benchmark for high-performance cooling solutions. Their C8 RS6/RS7 systems are engineered specifically for this platform using CSF's proprietary B-Tube core technology, which delivers substantially improved heat transfer compared to factory bar-and-plate designs.
- CSF Audi C8 RS6/RS7 High-Performance Intercooler System -- direct OEM replacement, substantially improved thermal performance
- CSF Audi C8 RS6/RS7 High-Performance Twin Intercooler Set -- Thermal Dispersion Black -- twin intercooler set with CSF's Thermal Dispersion coating for sustained high-load driving
The factory intercoolers were calibrated for European ambient temperatures. CSF intercoolers maintain consistent charge air temperatures across hot conditions, so your tune delivers the same power on the 10th run as the first.
4. ECU Tuning and Software
The 4.0T V8 in the C8 RS6/RS7 has substantial factory headroom. Audi calibrated the engine conservatively for global emissions compliance and fuel quality variability -- not for maximum output. A quality ECU remap on a stock engine typically yields 500-520kW at the wheels, with further gains available combined with exhaust and intake modifications.
Key considerations for C8 tuning:
- Mild hybrid compatibility: The C8's 48V MHEV system must be accounted for in any tune. Use a tuner with specific C8 experience.
- OPF/GPF decat: If running Milltek Sport race downpipes or any decat pipes, your tune must be calibrated accordingly.
- Tune after hardware: Always install exhaust and intake first, then have the car tuned to the full combination.
- Fuel quality: Australian 98RON is appropriate for performance tunes. Ensure your tuner is calibrating for local fuel specifications.
- Intercoolers first: For serious power builds, fit CSF intercoolers before tuning. Consistent air temperatures produce consistent, repeatable power.
ModsDirect works with Australia's leading Audi-specialist tuners. Contact us for tuner referrals in your state.
5. Suspension and Lowering for the Audi RS6 and RS7 C8
The C8 RS6/RS7 runs Audi's air suspension as standard -- a sophisticated system that provides exceptional ride comfort in its softer modes. Two main upgrade paths exist for owners wanting improved stance or sharper dynamics: lowering links (working within the existing air suspension system) or coilover conversion (replacing the air suspension entirely).
RacingLine Height Adjustable Lowering Links
RacingLine's lowering links are the most practical and reversible suspension modification for the C8 platform. They work within the factory air suspension system, enabling a lower ride height while retaining all factory air suspension modes (Comfort, Auto, Dynamic, Lift).
- RacingLine Height Adjustable Lowering Links -- Audi C8 Air Suspension Platform -- adjustable to achieve the desired drop without compromising air suspension functionality
Wheel Hardware
If you are running aftermarket wheels on your RS6/RS7, RacingLine's precision-machined wheel hardware is essential for a correct, safely torqued installation. Stud conversion kits replace factory lug bolts with studs for easier wheel changes.
- RacingLine Stud and Nut Conversion Kit -- Full Car Set 80mm Tapered
- RacingLine Stud and Nut Conversion Kit -- Full Car Set 80mm Ball (R14)
- RacingLine Stud and Nut Conversion Kit -- Full Car Set 70mm Tapered
- RacingLine Stud and Nut Conversion Kit -- Full Car Set 70mm Ball (R14)
- RacingLine Locking Wheel Nuts -- Tapered
- RacingLine Locking Wheel Nuts -- Ball (R14)
Shop: All RacingLine Parts
6. Brake Upgrades for the Audi RS6 and RS7 C8
A 2,100kg performance vehicle making 500kW-plus demands exceptional braking. The C8 RS6/RS7 comes with large factory brakes that are adequate for road use but will fade under repeated hard stops on track or mountain roads. Upgrading brake pads is the first and most accessible improvement; two-piece rotors follow for serious applications.
Dixcel
Dixcel is Japan's leading performance brake manufacturer, producing pads and rotors to exacting tolerances for everything from daily driving to circuit use. Their C8 RS6/RS7 pad range covers every application.
Dixcel C8 RS6/RS7 Rear Brake Pads:
- Dixcel Rear Brake Pads -- RS6/RS7 C8 -- Daily/Street (Premium) -- enhanced street performance over OEM, low dust and noise; the recommended daily driver upgrade
- Dixcel Rear Brake Pads -- RS6/RS7 C8 -- Daily/Street (M Type) -- mono-block compound, improved initial bite for spirited road use
- Dixcel Rear Brake Pads -- RS6/RS7 C8 -- Spirited/Track Day (Z Type) -- high-temperature racing compound, excellent for track days while remaining street-usable when up to temperature
Shop: All Dixcel Brake Pads and Rotors
Girodisc
Girodisc manufactures two-piece floating rotor systems used by professional racing teams. Their RS6/RS7-compatible pad range works with factory or upgraded rotor packages. Note: confirm specific C8 variant compatibility with ModsDirect before ordering, as Girodisc fitments span multiple Audi generations.
- Girodisc GP10 Street Pads -- Audi RS6, RS7, RSQ8 Front
- Girodisc GP10 Street Pads -- Audi RS6, RS7, RSQ8 Rear
- Girodisc Street/Strip Pads -- Audi RS6, RS7 Front (incl. wear sensor)
- Girodisc Magic Pads -- Audi RS6, RS7 Front (incl. wear sensor)
Shop: Front Brake Pads | Rear Brake Pads
7. Aerodynamics and Carbon Fibre for the Audi RS6 and RS7 C8
The C8 RS6 and RS7 have restrained, understated factory styling. Tasteful aerodynamic and carbon upgrades reinforce the car's performance character without crossing into aggression.
Akrapovic Carbon Fibre Rear Diffusers
Akrapovic's carbon fibre diffusers are designed as companions to their exhaust systems, integrating directly with the C8's factory rear bumper.
- Akrapovic Rear Carbon Fibre Diffuser -- Gloss -- Audi RS6/RS7 (C8)
- Akrapovic Rear Carbon Fibre Diffuser -- Matte -- Audi RS6/RS7 (C8)
Eventuri Carbon Engine Covers
Pair the Eventuri intake with a matching carbon engine cover for a cohesive engine bay presentation. Available in gloss and matte to match your intake finish.
- Eventuri Audi C8 RS6/RS7 Black Carbon Engine Cover -- Gloss
- Eventuri Audi C8 RS6/RS7 Black Carbon Engine Cover -- Matte
8. Recommended Build Progression for the Audi RS6 and RS7 C8
The C8 responds best to a systematic approach. Each upgrade builds on the last. Below is ModsDirect's recommended build progression for Australian RS6/RS7 owners.
Stage 1 -- Street (Bolt-On, No Tune Required)
Best for owners who want a noticeably improved experience without touching the engine management.
- Akrapovic Sound Kit -- immediate, reversible acoustic improvement
- RacingLine High-Flow Panel Filter -- drop-in, no tune required
- RacingLine Lowering Links -- improved stance, air suspension fully retained
- Dixcel Rear Brake Pads (Daily/Street Premium) -- improved braking feel and fade resistance
Stage 2 -- Performance (Exhaust + Tune)
Best for owners ready for a significant power and sound step. Estimated output: 500-520kW at the wheels.
- Akrapovic Evolution Line (Titanium) cat-back
- Akrapovic Downpipe/Link Pipe Set
- Eventuri Carbon Intake (Gloss or Matte)
- ECU remap calibrated to the full exhaust and intake combination
- Dixcel Z Type Track Day Brake Pads matched to the increased performance
Stage 3 -- High-Power Build (Cooling + Forced Induction)
Best for owners targeting 600kW-plus or running the car on track regularly. Cooling is non-negotiable at these power levels in Australian conditions.
- CSF Twin Intercooler Set -- Thermal Dispersion Black
- Eventuri TTE 888/1020 Hybrid Turbo Inlets (if running TTE hybrid turbos)
- Milltek Sport Large Bore Race Downpipes (track/off-road use only)
- Full retune to the combined specification
- Girodisc brake pad upgrade
9. Frequently Asked Questions -- Audi RS6 and RS7 C8 Performance Upgrades
What is the best first upgrade for the Audi RS6/RS7 C8?
The Akrapovic exhaust -- either the slip-on cat-back or Evolution Line -- is the highest-impact first modification. It transforms the sound immediately and is the foundation of any tuned build. If budget is the priority, the Akrapovic Sound Kit delivers a real improvement without replacing the full system.
Do I need a tune to run an Akrapovic exhaust on the C8?
No. Akrapovic cat-back (slip-on) systems are designed to work without an ECU remap and will not trigger fault codes. If you install downpipes, a tune is strongly recommended to take full advantage of the reduced backpressure.
Is the Eventuri intake a replacement for the factory airbox or does it work with it?
The Eventuri is a full replacement for the factory airbox and filter. It is a sealed system designed to prevent hot underbonnet air from entering the turbo inlets. The 2023 Breather Adapter Kit is required for 2023 model year RS6 Avant variants.
What is the difference between OPF and non-OPF exhaust variants?
OPF (Otto Particle Filter) is a particulate filter fitted to Euro 6d compliant vehicles. OPF-equipped cars require exhaust systems designed to accommodate or remove the OPF unit. Non-OPF systems will not fit correctly on OPF vehicles. Contact ModsDirect with your VIN before ordering.
How much power can a stock C8 RS6/RS7 make with a tune?
On a quality Stage 2 tune (exhaust plus remap), a C8 RS6/RS7 will typically produce 500-520kW at the wheels on Australian 98RON. With a full intake addition, Stage 2 can push 530-550kW. Hybrid turbo builds using the TTE 888 can exceed 650kW with full supporting modifications.
Will these upgrades affect my Audi warranty in Australia?
Modifications can affect your Audi Australia statutory warranty. ModsDirect supplies all parts with full manufacturer warranties. We recommend consulting your dealer and a legal or warranty specialist for your specific situation.
Does RacingLine make suspension products for the C8 RS6/RS7?
Yes. RacingLine's Height Adjustable Lowering Links are engineered specifically for the C8 air suspension platform. They lower the ride height while retaining full air suspension functionality across all factory drive modes.
Why are CSF intercoolers particularly important for Australian RS6/RS7 owners?
The factory intercoolers were calibrated for European ambient temperatures. In Australian summer conditions, heat soak in the factory units is a measurable and consistent power loss. CSF intercoolers maintain consistent charge air temperatures, ensuring your tune delivers the same power on the 10th run as the first.
Why Buy From ModsDirect?
ModsDirect is Australia's authorised dealer for every brand in this guide: Akrapovic, Eventuri, CSF, Milltek Sport, RacingLine, Dixcel and Girodisc. Every product is supplied with:
- Full manufacturer warranty
- Australian fitment advice specific to your variant (non-OPF, OPF, Performance Edition)
- Local technical support
- Genuine stock, not grey imports
Our team has direct, hands-on experience building RS6 and RS7 C8 setups across Australia across multiple power levels and use cases.
Ready to build yours? Contact ModsDirect -- let us know your model year, OPF/non-OPF status and your goals. We will help you build it right.