Year One enhanced the performance of its LS1 OEM short-block with a Comp valvetrain, and the fuel-delivery system was upgraded to ensure adequate fuel flow should additional modifications (nitrous or blower) be performed later. Custom computer programming removed those areas of the OEM system not needed for this application, such as the secondary O2 sensors, EGR, evaporative-control system, and so on. Here's a quick list of the items and vendors used to perform this LS1 installation.
'98 LS1 engine (OEM block, crank, rods, pistons)
'98 4L60E automatic transmission
ATI LS1 damper
Baer four-wheel disc brakes, EradiSpeed 13-inch rotors
BBK 80mm throttle body
Be Cool prototype aluminum radiator, electric fans
BRP engine mounts
BRP-modified '98 Z28 steering rack
BRP remote-mount coils with MSD plug wires
BRP transmission crossmember
BRP-fabricated cold-air system
BRP-modified front sway bar
BRP-modified OEM subframe
Comp Cams camshaft
Detroit Speed & Engineering
Selecta-Speed wiper kit
Flaming River steering shaft, components
Global West subframe connectors
Global West tubular front control arms
Holley fuel-system components, trunk-mounted race battery and bracket
Katech Engine Development C5-R valve covers
M&H Electric chassis wiring harnesses
Modified GM PCM
Painless engine wiring harness, modified by Year One/BRP
PST carbon-fiber driveshaft
Stainless Works stainless steel
3-inch chambered exhaust system
Stainless Works stainless steel long-tube headers
TCI Street Fighter lockup 2,800-stall torque converter
Vintage Air HVAC system
Weiand polished aluminum LS1 intake
Year One, many products