What year is this Specialized Stumpjumper FSR?

Actually, I don't believe it's a Stumpjumper, I think it is a 2001 Specialized S-Works FSR XC.

This appears to be a 2003 Stumpjumper FSR XC disc. It has aftermarket parts like the Deore rear derailleur (stock was Shimano 9s XT), RockShox Reba fork (stock was 100mm Manitou Super Axle). The crankset---which looks gorgeous with the color scheme of this bike-- is not the stock Specialized Strong Arm II, I don't believe.

Observations that made me decide on model year '03 include the hole in the seat post support structure, what appears to be a Fox FLOAT RL for rear suspension, and color scheme, none of which are present on an '02 Stumpy FSR XC. The '02 and '03 models share nearly identical frame characteristics like M4 tubing, the curved and offset seat tube, Horst link, type and placement of the rear shock. Componentry is fairly identical sharing the same Shimano M525 disc brake system, 9s Deore LX shifters and front der, 11-32t cassette. '02 models sported XTR (M952) rear ders where '03 got XT. Another element when comparing the stock-equipped models is the front fork where the RockShox Duke XC was replaced by a Manitou in '03. In 2004, many changes are evident to the frame design that are absent here.

Nearly 20 years old, my '02 Stumpjumper, rides like a dream with the original rear Fox FLOAT R rear shock paired with an '07 Fox FLOAT RL fork. I modernized the drivetrain to Shimano Deore 2x10 (34/24t front, 11-36t cassette, Hollowtech2 cranks), clutched Deore rear der, XT front der, SLX shifters, and Deore disc brakes (BR/BL M596). Cockpit, hubs and rims are the OE. Despite the age and mere 26" wheels, it is FAST and just rocks the single track.