Performance Parts

The Speedmaster GM Rear Metric Caliper (PCE521.1006) is a complete rear brake caliper assembly designed for General Motors vehicles. It features an integrated emergency brake mechanism and is...

The Speedmaster PCE521.1005 is a genuine GM rear metric caliper assembly engineered for General Motors vehicles requiring emergency brake functionality. This right-hand side unit features a 5" pin...

This Speedmaster GM TH350 Billet CNC Full Manual Valve Body Spragless Upgrade Kit delivers precision transmission control for performance and racing applications. The spragless design and manual...

The Speedmaster GM TH400 Automatic Transmission Billet Front Oil Pump (PCE693.1003) is a precision-engineered replacement pump designed for classic and performance GM TH400 automatic transmissions...

The Speedmaster GM TH400 Billet Aluminum Intermediate Piston (model PCE676.1012) is a precision-engineered replacement component designed for GM TH400 automatic transmissions. This billet aluminum...

The Speedmaster GM TH400 Direct Clutch Assembly with Direct Clutch Hub is engineered for high-performance racing applications. This direct clutch assembly is specifically designed for the GM TH400...

The Speedmaster GM TH400 Direct Clutch Assembly with Direct Clutch Hub (STD, model PCE623.1022.01) is a precision replacement component designed for GM TH400 automatic transmission rebuild and repair...

The Speedmaster GM TH400 Forward Clutch and Direct Clutch Assembly (PCE623.1018.01) is a transmission component designed for General Motors TH400 automatic transmissions. This assembly houses the...

This is a forward clutch and direct clutch assembly designed for the GM TH400 transmission, intended for racing applications. The assembly is supplied without clutches, allowing builders and...

The Speedmaster PCE623.1019.01 is a complete forward clutch and direct clutch assembly designed for the GM TH400 automatic transmission. This assembly features carbon fiber clutches that deliver...

This Speedmaster PCE623.1019.02 is a GM TH400 forward clutch and direct clutch assembly engineered for racing and high-performance transmission builds. The assembly features carbon fiber clutches,...

The Speedmaster GM TH400 Heavy Duty Racing Transmission Billet Aluminum Direct Drum (PCE623.1010) is a performance-grade transmission component engineered for high-output racing and heavy-duty...

The Speedmaster PCE623.1009 is a GM TH400 racing heavy duty transmission input shaft and aluminum forward drum assembly designed for high-performance automotive applications. This component combines...

The Speedmaster PCE634.1007 is a billet aluminum external valve body designed for GM TH400 transmissions, engineered for high-performance manual control applications. This full manual valve body...

The Speedmaster PCE634.1008.01 is a billet aluminum full manual 2-speed valve body engineered for GM TH400 transmissions. Constructed from premium billet aluminum, this valve body delivers precision...