How much do they charge directly from their website? There's no info listed there. Did you feel any difference in terms of airflow under the car at higher speeds?
I was looking at the AC Schnitzer one as well which was similar to this design, only they had a rear diffuser under the rear of the car as well for downforce. I always wanted something like this, just never knew where to find one. The 318's never came with any kind of plastic cover for the bottom, so this is a good investment for 318 owners. I assume it should bolt right up to the OEM M3 front?
'02 C32 AMG @ 18psi - Eurocharged custom ECU/TCU, ASP 178mm crank pulley + NW PSK, CM30 i/c pump, NW i/c iso kit, EC i/c, Magnecore wires, NW CAI, SL55 Y pipe, NW ported intake manifolds + gaskets/spacers, NW inconel exhaust manifolds, NW catch can, dual exhaust, H&R sways, H&R coilovers, H&R spacers, Quaife ATB LSD, goodridge lines, EBC yellowstuff, AMG 18" rims, Zeitronix datalogger.