Recently purchased a 4k mile 04 in perfect condition. Installed Ivan's kit per the instructions TO THE LETTER. Better small opening performance, the engine is smoother, pulls like hell above 8k, and idles smooth like it should. This guy knows his stuff, and I think the 120.00 for the kit is a BARGAIN for the trouble-free result that I obtained. Excellent addition to your Gen 1 FZ!!!