heavily modded cars are usually heavily driven... usually. I personally dont believe a damn thing people tell me. Id check the validity of the "lifetime warranty", cuz shocks go bad eventually no matter what, so i cant see Koni or anyone else offering that. If they are not installed in his car, see if you can borrow them and bring them to someone who has a strut tester. Personally I'd spend the extra few hundred bucks for new.

 

I looked into it and they do have a lifetime warranty..... but only for the original owner. The reason he told me he is selling them is because he is selling all of his mods due to being laid off and needing money. He has a bunch of other stuff I would like to have but don't want to spend the money.

This is a list of what he is selling:
New Zeitronix ZT2 wide band O2 sensor w/ display-includes EGT and boost sensors-300.00
New custom carbon fiber gauge cluster with 2 SPA gauges-175.00
Used APR Stage 3 turbo kit for 1.8T-includes turbo, exhaust manifold, injectors, coolant and oil lines-1700.00
Used 2Bennett Stage 2 front brake kit-1000.00
New S8 rear brake kit-includes rotors, calipers, brackets and pads-300.00
New LLTek RSR front bumper (silver) with front mount intercooler-1000.00
Used B5 S4 black leather interior-1000.00
New custom 3" exhaust system with bungs for EGT and wideband O2 sensor-400.00
Walbro in-tank fuel pump-150.00
New Aquamist HFS-5 water/methanol injection system-670.00
New Spal 12" electric fan-110.00
Used 1st Generation Koni coilovers (front and rear)-700.00
New Neuspeed Adjustable rear sway bar-200.00

 

Yeah, Koni has lifetime warranty. A buddy of mine had one of his coils blown and he got it replaced from Koni.

Koni also does re-building for other coilovers made by other companies.

Oh yeah, if you drive the car daily, I suggest you keep the old shocks/springs. Incase things go bad with the coilovers, you'll still have the old setup to put on and will still be able to drive the car.