Shopping for performance parts for Audi S4 models usually starts with a cart full of "must-have" upgrades and ends with a question: which of these actually matter for my car and my budget? This guide breaks the S4 down category by category (engine and ignition, induction, forced induction, cooling, exhaust, drivetrain, brakes, suspension, and wheels) and tells you what to buy at each price point. Most of it is aimed at the supercharged B8/B8.5, with B9 notes where the parts differ. Our pick for the first bolt-on is the Titanium Intake V2 for the B8/B8.5 Audi S4.
Want the build order instead of the shopping list? Our Audi S4 mods roadmap covers stage-by-stage sequencing. This page is the parts catalog with a budget brain.
First: Which S4 Are You Buying Performance Parts For?
- B8 (2010-2012) and B8.5 (2013-2016): supercharged EA837 3.0T. Pulleys, ported superchargers, and intercooler-loop cooling are the big levers.
- B9 and B9.5 (2018+): turbocharged EA839 3.0T. Software, charge-air cooling, MAP sensors, and ignition are the big levers.
Mixing them up is the most expensive mistake in S4 shopping. A crank pulley does nothing for a B9, and a B9 MAP sensor does nothing for a B8. For the B9 side in detail, see our turbo Audi S4 guide.
What to Look For in Any S4 Performance Part
- ✅ Platform-specific fitment by chassis and engine code, not just a vague fits-S4 label.
- ✅ Metal where OEM used plastic in heat-soaked areas like the thermostat and tensioner.
- ✅ Honest power claims: parts that support power (cooling, ignition) are as important as parts that add it.
- ✅ Street legality awareness for exhaust and emissions parts.
- ✅ Reasonable pricing: no Audi Tax, no brand-name markup for the same OE-supplier component.
Performance Parts for Audi S4 by Category
Engine and ignition
Coils and plugs are the cheapest insurance against misfires once you add boost. On the B8/B8.5, the Zeus ignition coil kit for the EA837 is $129.99. On the B9, the Zeus coil kit for the EA839 is $199.99. Supercharged cars should also budget for the valley refresh with the Gen 1 B8.5 under supercharger kit ($649.99) or a standalone billet thermostat housing ($149.99-$199.99).
Induction and throttle body
The Titanium Intake V2 ($359.99) improves flow and sound on the B8/B8.5 S4, S5, Q5, and SQ5. Add the Luft-Strom 84mm throttle body upgrade kit ($219.99-$349.99) or the VDO OEM 84mm throttle body upgrade ($244.99) to open up the blower inlet. Even a fresh intake coupler ($14.99) fixes the cracked-rubber boost leaks older cars develop.
Forced induction
This is where supercharged S4s gain real power. The TruDrive crank pulley ($249.99-$329.99) spins the blower faster with matching software. The Artus-Sturm ported supercharger service ($749.99-$1,599.99) improves the Eaton R1320's airflow, and the Sehr Gut intercooler port kit ($67.67) improves coolant flow through the intercoolers. On the B9, 4 bar MAP sensors ($99.99) replace the factory 3 bar units once boost targets climb.
Cooling
Heat is the S4's power thief. The GP Ice heat exchanger v2 ($449.99) and a Pierburg coolant pump upgrade ($179.99-$289.99) keep intake temperatures steady over repeated pulls. See our heat exchanger upgrade guide for how the loop works.
Exhaust
For B8/B8.5 cars, high flow cats for the 3.0T ($1,049.99-$1,299.99) are the street-friendly flow upgrade. Headers range from the shorty headers ($999.99) to HEH Headers V2 ($1,599.99-$1,999.99). Check your local emissions rules before changing anything catalytic.
Drivetrain and mounts
The TruShift transmission mount ($19.99) fits B8 through B9.5 and is the best-value part on this page. B8/B8.5 owners can add TruSport DynaCore engine mounts ($249.99), rear differential carrier inserts ($44.99), and billet subframe inserts ($79.99) to cut wheel hop and slop.
Brakes
Front: the Anker Street big brake kit ($1,849.99-$1,899.99) for B8/B8.5. Rear: the Haken Street rear big brake kit ($1,599.99-$1,649.99) fits B8 through B9.5 and keeps an electronic parking brake. Velocity rotors ($574.99-$1,399.99) upgrade the rotor side.
Suspension and wheels
Total Control RS TwinTrac coilovers ($1,399.99) for B8/B8.5 A4 and S4. Forged sets like the VF-10 ($1,399.99-$2,599.99) drop rotating mass, and a titanium wheel lock kit ($89.99-$124.99) finishes the job. Browse the forged wheels collection for more styles.
What to Buy at Every Budget
Here is the short version, organized by what you want to spend on performance parts for your Audi S4.
| Budget | B8/B8.5 S4 (supercharged) | B9/B9.5 S4 (turbo) |
|---|---|---|
| Under $250 | TruShift mount, Zeus EA837 coils, intake coupler, Sehr Gut port kit | TruShift mount, Zeus EA839 coils, 4 bar MAP sensors |
| $250-$1,000 | Titanium Intake V2, 84mm throttle body, TruDrive pulley, GP Ice heat exchanger, under supercharger kit | Software and cooling planning, then save toward brakes |
| $1,000-$2,500 | Ported supercharger, high flow cats, headers, coilovers, front or rear BBK | Haken Street rear BBK |
| $2,500+ | Full forged wheel set plus brakes, or complete power package | Forged wheels and brake package |
How does that compare with other routes? Dealer parts only restore stock, often with the same plastic that failed. Typical name-brand parts work, but many are premium-priced alternatives for the same OE-supplier components.
| Vorsprung | Typical name-brand option | Dealer/OEM | |
|---|---|---|---|
| Goal | Fix weak points and add power | Add power | Restore stock |
| Heat-prone parts | Billet and metal | Varies | Plastic OE |
| S4-specific fitment help | Yes, real 3.0T owners | Varies | Service advisor |
✅ OE-supplier and billet components ✅ S4 fitment help from real 3.0T owners ✅ Fast US shipping
Shop the Titanium Intake V2, $359.99
Install Notes
- Mounts, coils, intake, and MAP sensors are driveway jobs with basic hand tools.
- Pulley, valley refresh, and supercharger porting are supercharger-off jobs: combine them to save labor.
- Exhaust and brakes need a lift or solid jack stands and usually fresh hardware.
- Log intake temperatures and fuel trims before and after each change.
Want the background on the S4's supercharged engine first? Read Audi S4 supercharged.
Performance Parts for Audi S4 FAQ
What are the best performance parts for Audi S4 models on a budget?
Under $250, the best performance parts for Audi S4 owners are the TruShift transmission mount, upgraded ignition coils, and on the B9, 4 bar MAP sensors. They improve reliability and support more power.
What is the first performance part to buy for a B8 S4?
After basic maintenance, an intake or the TruDrive crank pulley with matching software gives the most noticeable change. Fix the known cooling and PCV weak points first.
Do B8 S4 performance parts fit the B9 S4?
Mostly no. The B8/B8.5 is supercharged and the B9 is turbocharged, so engine parts differ. Some chassis parts, like the TruShift mount and Haken Street rear brakes, fit both.
How much horsepower does an intake add to an Audi S4?
It depends on the car and software. An intake mainly improves airflow and sound; the big gains on a B8/B8.5 come from software, a pulley, and a ported supercharger.
Are high flow cats legal on an Audi S4?
Emissions rules vary by state and country. Check your local regulations and inspection requirements before replacing catalytic converters.
Is a big brake kit worth it on an S4?
If you have added power or do track days, yes. Larger brakes resist fade and give consistent pedal feel under repeated hard stops.
Do I need a tune for performance parts on my Audi S4?
Bolt-ons like mounts, coils, and an intake do not require one. A crank pulley, ported supercharger, or higher boost on a B9 does need matching software.
Bottom Line
The smartest performance parts for Audi S4 owners are the ones matched to the car and the budget: reliability and ignition first, then breathing parts like the Vorsprung Titanium Intake V2 for the B8/B8.5 S4, then pulley, cooling, exhaust, and chassis as the budget grows. Spend in that order and nothing you buy gets wasted.
Shop the Titanium Intake V2 for S4, $359.99
Drive the difference. Drive Vorsprung.
Prices checked September 25, 2026 and subject to change.
