Transmissions & Drivetrain

Circle D Pro Series 3200-3400 Stall Speed 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...

Circle D Pro Series 2400-2600 Stall Speed LS 6L80 300mm Triple Disk Torque Converter  This converter is a fantastic upgrade over the OE 6L80 Converters. A daily-driver friendly stall speed coupled with billet components makes this a...

Circle D Pro Series 2200-2400 Stall Speed LS 6L80 300mm Triple Disk Torque Converter  This converter is a fantastic upgrade over the OE 6L80 Converters. A daily-driver friendly stall speed coupled with billet components makes this a...

Circle D Pro Series 5000+ Stall Speed LS PG/350/400 245mm Torque Converter  These Pro Series 245mm billet torque converters are ideally suited Street, Street/Strip, & Sportsman Drag Racing applications using a Powerglide, TH350, or TH400...

Circle D Pro Series 4700-4900 Stall Speed LS PG/350/400 245mm Torque Converter  These Pro Series 245mm billet torque converters are ideally suited Street, Street/Strip, & Sportsman Drag Racing applications using a Powerglide, TH350, or TH400...

Circle D Pro Series 3000-3200 Stall Speed LS PG/350/400 245mm Torque Converter  These Pro Series 245mm billet torque converters are ideally suited Street, Street/Strip, & Sportsman Drag Racing applications using a Powerglide, TH350, or TH400...

Circle D Pro Series 2800-2900 Stall Speed LS PG/350/400 245mm Torque Converter  These Pro Series 245mm billet torque converters are ideally suited Street, Street/Strip, & Sportsman Drag Racing applications using a Powerglide, TH350, or TH400...

Hooker Blackheart 1970-1981 Transmission Crossmember Gen II F-Body LS Swap T56 12616HKR-1  Revised Design specifically for T56 (GM 4th-gen F-body/GTO versions only), T56 Magnum, 4L80E/4L85E, TH400 and 200R4 transmission installations. The revised...

Hooker Blackheart 1982-04 GM S-10/Sonoma 2WD LS Swap Transmission Crossmember 71222020HKR Hooker continues to set the standard of performance with the Blackheart line of engine swap system components. We are proud to offer these three engine swap...

Hooker Blackheart 1982-04 GM S-10/Sonoma 2WD LS Swap Transmission Crossmember 71222018HKR Hooker continues to set the standard of performance with the Blackheart line of engine swap system components. We are proud to offer these three engine swap...

Hooker Blackheart 1982-04 GM S-10/Sonoma 2WD LS Swap Transmission Crossmember 71222019HKR Hooker continues to set the standard of performance with the Blackheart line of engine swap system components. We are proud to offer these three engine swap...

Circle D Specialties LS/LT Billet Flexplate 8 Bolt - FLEX-BS-GM-LST-8 The perfect addition to your high-end LS/LT build. Features are as follows: SFI 29.2 Certification - Highest Rating Possible 1-Piece Billet Steel Design 6 Bolt or 8 Bolt...