The BEST Mod for the Audi B9 S4?! (034 Motorsport Rear Sway Bar Install!)

Our Audi B9 S4 gets one of our favorite mods installed on the car, the 034 Motorsport Rear Sway Bar Upgrade! The 034 Motorsport rear sway bar upgrade on the B9 S4 is easily one of the best handling mods you can do as it totally transforms the driving behavior of the car from a understeering feel to a more neutral and sometimes oversteer feeling.
034 Motorsport Rear Sway Bar
www.034motorsport.com/034moto...
FULL MOD LIST FOR THE WHITE B9 S4
RS Quattro Grille
KW HAS Spring Kit
ECS 10mm flush kit
034 Motorsport Stage 1 ECU Tune
034 Motorsport Stage 2 TCU Tune
Unitronic Carbon Fiber Intake
Unitronic Intercooler
35% Ceramic Tints
3M Gloss Black Roof Wrap
Mid Smoke Taillights
Black Audi Logo and Badge
EuroImpulse Carbon Fiber Spoiler
ECS Tuning Valved Catback
Nuespeed Rse702 19 wheels
Brembo 6 Piston BBK
ECS Rotors front and rear
034 Motorsport Transmission Mount Insert
Thanks for watching and stay tuned for more mods to the Audi S4 and S6!
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/ drivenbyboost

[@TheSauceSultan]

Came across your channel years ago when I was dreaming about owning a golf r. Now I own one! Really happy to see you’re still making videos brother.

[@drivenbyboost]

I really appreciate that! Congratulations on the golf R!!!

[@clemsonguy99]

So glad to see some new content! Your car looks amazing! The sway bar swap is such a game changer.

[@drivenbyboost]

It really is, I’m absolutely enjoying the car so much more now that it’s playful in the turns!

[@clemsonguy99]

@@drivenbyboost I’m sure. I did the same mod to my MK7 GLI along with the end links. Totally changed the car, especially on a track. Much more precise. Gives you a lot of confidence when making turns. Enjoy!

[@nitegrip908]

I’ve had mine for over 2 years and it’s so much better with the 034 sway bar. I got the stage 1 sway so just the back. I wonder how the bigger front and back do.

[@MatthewJay80]

Thanks man. Please share more recommendations soon.

[@midlifemods]

Great mod. First one I did on my b9.5 S4

[@drivenbyboost]

Night and day difference, the car actually wants to rotate through the corners 👍

[@Lsthnbrd]

Awesome review. I keep going back and forth if I want to get this done. I only drive my car on the road, the only racing I do is straight line, so I’ve been wondering if you really have to push it in corners like you’re on a track to feel the difference, but it sounds like it’s still a great mod for just spirited street driving.

[@drivenbyboost]

Absolutely a great mod for just street driving. It’s worth it for sure, even just driving around town you notice a major difference in handling for the better 👍

[@Slow4b9]

I’m in the middle of swapping mine now and the end links had to stretch a good amount for the sway bar to get in , you don’t think they’ll snap ?

[@93ChayZ]

Glad you’re back! 🔥🔥🔥

[@drivenbyboost]

🤙

[@alexdemir_]

Love the s4 content man! Any plans on new videos?

[@drivenbyboost]

Yes dyno day and stage 2 are up next. Apologies for the delays, lot of life changes happening this year 🙏

[@st33d57]

You gotta get a dp it would make the exhaust sound even better and more power

[@drivenbyboost]

Absolutely do, it’s on the way ✅

[@st33d57]

@@drivenbyboost are you going catted or catless?

[@drivenbyboost]

@@st33d57 we got a catless down pipe. Hope it won’t be too loud or smelly abut we’ll see

[@leecook7904]

Just got mine installed with the front strut brace and the car handles so much different now. Do you have all 034 mount inserts as well?

[@drivenbyboost]

I have the transmission Mount insert and it made a huge difference in the shifts and feel of the car for the better

[@jefftmusic]

Hi have a9.5 S4 with sports package.. What is the "audi understeer" i keep seeing people mention? Maybe im not experienced enough of a driver, but i feel like my car hugs turns and with the sports diff when i give throttle in the turn it whips around the corner even more. I was considering the sway bar but also wondering if i need it. My girl has a b8 A5 and that thing handles like an RV compared to my S4

[@1kiwigary]

Because your car has the sports differential understeer isnt an issue. it will turn much better than my S4 which doesn't have a sports diff.

[@rutviknakrani7906]

Hey how does it feel like from bone stock? Does it loose traction at high speed (back roads) cornering?

[@drivenbyboost]

Wouldn’t say it looses traction but the rear is way more playful and turns in better. I’d say with wet conditions you’d definitely be able to power slide the rear end out

[@vdubster_mk7181]

Did the swaybar reduce body roll by a noticeable amount from stock?

[@drivenbyboost]

It improves it a lot. Very very noticeable

[@billbellinzoni7747]

What rims are on your S4? I like them!

[@drivenbyboost]

Nuespeed rse102 19x9 👍

[@Account1746]

Audi lit bro keep that mf for life

[@drivenbyboost]

Definitely, she’s a keeper for sure

[@BulliKid]

👌👌👌

[@drivenbyboost]

Yeee buddy

[@cullenwilliams4356]

Bring back Cullen 🥵🥵🥵

[@drivenbyboost]

😂 i agree ☝️

[@Nogieeee]

Respect Cullen or else you’ll surely pay😵🪦☠️

[@Nogieeee]

Content train 🚆 inbound

[@drivenbyboost]

Yeeee sir, all aboard 🫡