When i first got it, i said, i'll wait till my warranty expires. Then i went for a ride in a stage 2 S4 and everything changed. I was still on the fence as it was seemingly big risk, but my local audi dealer has a motorsports division and they will handle warranty work if needed and reflash back to stock at no charge.
I did my mods in stages because i like to see how each changes the driving dynamics and driving experience.
1. 19k miles. Got 19" ti rotors with michelin pss and lowered on HR OE springs.
the difference from the stock 18 all seasons to summers and lowered was very noticeable. It was difficult to get the wheels to lose traction with the summers and more road feel was translated through the steering.
2. 23k miles. Added APR stage 1 and USP intake.
The intake makes for a loud supercharger whine which I liked and the stage 1 upgrade made rowing through gears at higher rpms very fun.
3. 30k miles. Added APR stage 2.
This increased throttle response and increased overall power. Now i was getting the pin you in your seat type acceleration at lower rpms, but also the ability to stay in 6th gear on the highway and not have to downshift to pass.
4. 35k miles. AK brace and eurocode ss.
The short shifter really makes shifting more precise and provides great feedback to the driver. The AK brace helped with quicker turn in, but not as noticeable as I had expected. I will see once i get my summers back on.
The best bang for my buck mod IMO was the short shifter. It was not as expensive as the other mods, made me feel like I was driving a new car, and really made rowing through gears fun.
The mod that provided the biggest change in driving experience was the tires and lowering springs. This is pretty common knowledge as tires always make a huge difference but if you are torn between stage 2 or a summer setup, I would do this first.
I've had no issues yet with my car, except for a weird wiper motor burning out(fixed under warranty) but aside from that it has been great.
How have others modded their S4s?
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