Chevrolet Impala SS
The 2004–2005 Impala SS brought the SS badge back to Chevrolet’s W-body sedan with the 240-hp supercharged L67, 280 lb-ft, 17-inch wheels and firmer suspension tuning.
A W2 car enthusiasts search for by name.
Factory story
Chevrolet’s supercharged SS arrived late in the W2 cycle, but it gave the Impala a legitimate factory performance specification rather than an appearance-only identity.
Build philosophy
The SS benefits from the same 3800 supercharged tuning knowledge as GTP/GS cars, but chassis weight, cooling, brake package and sedan use case should shape the modification plan.
Preservation note
Special appearance cars—especially documented Indy-related editions—deserve extra attention to original wheels, decals, interior trim and paperwork.
Build in layers, not random parts.
Baseline
Compression/health checks, fluids, cooling system, plugs/ignition, vacuum leaks, mounts, hubs, brakes and tire condition.
Chassis & reliability
Quality tires, brake service/upgrades, fresh dampers/bushings, cooling-system refresh and transmission health before extra power.
Airflow & calibration
Intake/exhaust changes and scan-data-driven calibration with fuel quality and knock control kept front and center.
More blower
Pulley/intercooler/fuel/valvetrain decisions belong together. Scan, log and tune rather than assuming a parts combination is safe.
Master Customs prioritizes factory-era documentation and period road tests, then uses established enthusiast references for service and ownership context. Equipment changed by model year and RPO; verify a specific car by VIN/RPO and factory service information before ordering parts.