Circle D GM 230mm Pro Series PG/350/400 Torque Converter
Product details
These Pro Series 230mm billet torque converters are ideally suited for Track, Street/Strip, & Sportsman Drag Racing applications using a Powerglide, TH350, or TH400 transmission with or without transbrake. Build features & options on these converters include:
- CNC-machined billet steel drive cover
- 4,000 - 6,500+ RPM stall speed options
- Fully furnace brazed impeller & turbine assemblies
- TIG welding reinforcement of impeller & turbine fins in high stress areas
- Roller bearings on both sides of the stator
- HD steel stator options
- Custom HD deep groove ball bearing turbine support
- Billet steel pump hub
- Billet steel turbine hub
- Billet steel spragless insert
- Anti-ballooning plate
Ordering and production
Estimated lead time: 7–8 weeks before shipment. This includes Circle D's current production estimate plus additional time for specification review, order surges and the third-party handoff. It is an estimate, not a guaranteed delivery date.
SMGspeed may contact you after checkout to confirm the vehicle, transmission, engine combination, power level, power adder, intended use and requested stall before submitting the build.
Core notice: Some factory-core applications require a usable customer core. Any selection labeled CORE REQUIRED is priced with that requirement. Core freight, missing cores or unusable cores may create additional charges. SMGspeed will confirm any core requirement before production.
Custom made-to-order item: Review all selections carefully. Changes or cancellation may not be possible after production begins.