Transmissions & Drivetrain

Circle D HP Series LS 4L80 310mm Torque Converter   This unit is great for the HD trucks equipped with the 4l80 transmission. It tows well and will work with a mild camshaft and bolt ons. Available in 1600-2400 stall. Billet Front...

Circle D Pro Series LS 4L80 265mm Torque Converter  Pro Series Billet Torque Converter Converter Diameter - 265mm - 10 1/2" Available in stall speeds from 2500 - 3400 rpm Furnace Brazed  Hand TIG Welded  Torrington...

Circle D Pro Series LS 4L80E 245mm Torque Converter   Pro Series Billet Torque Converter Converter Diameter - 245mm - 9 3/4" Available in stall speeds from 3200-4600 rpm Furnace Brazed  Hand TIG Welded  Torrington...

Circle D Pro Series LS 4L80E 258mm Torque Converter   Pro Series Billet Torque Converter Converter Diameter - 258mm - 10 1/4" Available in stall speeds from 2800 - 3700 rpm Furnace Brazed  Hand TIG Welded Turbine...

Circle D HP Series LS 4L80 300mm Torque Converter  Great performance torque converter for a daily driven car or truck. This torque converter will have excellent street manners and only flash high when you want it.  *ONLY fits the dished...

Circle D Pro Series LS 4L60 265mm Torque Converter   Pro Series Billet Torque Converter Converter Diameter - 265mm - 10 1/2" Available in stall speeds from 2500 - 3400 rpm Furnace Brazed  Hand TIG Welded  Torrington...

Circle D HP Series LS 4L60 300mm Torque Converter  Great option for Daily Driver vehicle looking for a little more stall. Will drive 99% stock under light throttle. Converter diameter: 300mm - 12" Stall speeds 1800-3200Hand TIG Welded Woven Lockup...

Circle D Pro Series LS 4L60 245mm Torque Converter  The "go to" converter for the street/strip F-body, truck, GTO or similar 97-04 Corvette See "4L60 LT Product Line"2005 C6 Corvette       Pro Series Billet Torque...

Circle D Pro Series LT 4L60 245mm Torque Converter           Good choice for a street/strip C5 Corvette, LT1 F-Body, Impala SS, 350 Vortec Truck, or even 700R4 equipped vehicles.  Furnace Brazed  Hand TIG...

Circle D Pro Series LT 4L60 258mm Torque Converter    Pro Series Billet Torque Converter Made to Fit the GM 4L60E LT Style Transmission          Converter Diameter - 258mm - 10 1/4" Available in stall speeds...

Circle D Pro Series LT 4L60 265mm Torque Converter    Pro Series Billet Torque Converter Converter Diameter - 265mm - 10 1/2" Available in stall speeds from 2500 - 3400 rpm Furnace Brazed  Hand TIG Welded  Torrington...

Circle D 10L90 Torque Converter HP Series 4200-4400 Stall Speed            This is an excellent choice for your 2017+ Camaro ZL1 and 2018+ GM 10L90 equipped vehicle! This converter is based off the original factory...