Buick Regal GS
The Regal GS is the understated counterpoint to the Grand Prix GTP: the same 240-hp, 280-lb-ft supercharged L67 formula wrapped in Buick styling and comfort.
A W2 car enthusiasts search for by name.
Factory story
MotorTrend measured a contemporary GS at roughly 6.6 seconds to 60 mph—quick enough to make the car’s conservative appearance part of the joke.
Build philosophy
The GS is especially appealing for a restrained build: cooling, brakes, tires, mounts, maintenance and thoughtful calibration can make the car materially better without erasing its sleeper identity.
Preservation note
Original GS trim, wheels, badging and interior details are increasingly worth protecting. Modify the mechanical package in a way that can be documented and, where practical, reversed.
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.