Precision International 200-4R Servo Piston HD

Quality replacement heavy-duty servo piston for the GM 200-4R four-speed overdrive automatic transmission. This Precision International HD servo is manufactured to OEM specifications for guaranteed fitment in all 200-4R applications. The 200-4R is the factory overdrive transmission for the legendary Buick Grand National and GNX, making quality replacement parts essential.

Fits 1981-1990 Buick Grand National, Regal, GNX, T-Type, 1982-1984 Corvette, 1983-1988 Monte Carlo SS, and other GM vehicles. Precision-manufactured for reliable operation in both stock and performance turbocharged applications.