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Sonnax Performance Converter Kits

Engineered to Deliver Builds that Last

  • Widest variety of kits available
  • Designed for ease of assembly
  • Improve acceleration and durability with confidence

A performance torque converter is highly specialized based on the performance characteristics of the specific vehicle. From a gearhead’s hot rod to a workhorse diesel truck, Sonnax performance converter kits improve acceleration and durability for long-lasting, trouble-free builds.

Find More HP Torque Converter Parts

Use the chart below to find the right option for your build.

Additional components may be required when using these kits. See individual parts below for details.

Part Number Part Name Transmission Make Transmission Unit Converter Core Dampered? Spline Count Lockup Clutch Material
FD-RK-9 11" Performance Converter Kit Ford C4 GM 245mm No 26 Non-Lockup N/A
FD-RK-4 Performance Converter Kit Ford C6 GM 245mm No 31 Non-Lockup N/A
GM-RK-2 8" Performance Converter Kit GM 350, 400, Powerglide Opel No 30 Non-Lockup N/A
GM-RK-1417 10" Performance Converter Mounting Ring Kit GM TH350, TH400, Powerglide GM 245mm No 17 Non-Lockup N/A
FD-RK-10 Performance Converter Mounting Ring Kit Ford AODE, 4R70W GM 245mm Yes 31 Single-Plate Lockup N/A
GM-RK-1 10" Performance Converter Kit GM 350, 400, Powerglide GM 245mm No 30 Non-Lockup N/A
GM-RK-7 10" Performance Converter Kit GM 350, 400, Powerglide GM 245mm No 17 Non-Lockup N/A
GM-RK-498WC 298mm Performance Converter Kit GM 4L60, 4L60-E GM 258mm No 30 Multi-Plate Lockup Woven Carbon
FD-RK-1 Performance Converter Kit Ford AOD GM 245mm N/A 35 Non-Lockup N/A
GM-RK-12 298mm Performance Converter Mounting Ring Kit GM 200-4R, 4L60, 4L60-E GM 245mm Yes 27 Single-Plate Lockup N/A
FD-RK-12A Performance Converter Kit Ford 5R110W Ford 5R110W, 6-Stud Yes 31 Multi-Plate Lockup HTE
FD-RK-16A Performance Converter Kit Ford 5R110W Ford 5R110W, 8-Stud Yes 31 Multi-Plate Lockup HTE
GM-RK-17 300mm Performance Converter Kit GM 4L60-E GM 245mm Yes 30 Single-Plate Lockup N/A
GM-RK-408 300mm Performance Converter Kit GM 4L60-E, 4L65-E, 4L75-E GM 258mm No 30 Multi-Plate Lockup HTE
GM-RK-485 Performance Converter Kit GM 4L80-E, 4L85-E GM 265mm No 35 Multi-Plate Lockup HTE
GM-RK-485WC Performance Converter Kit GM 4L80-E, 4L85-E GM 265mm No 35 Multi-Plate Lockup Woven Carbon
GM-RK-488WC Performance Converter Kit GM 4L80-E, 4L85-E GM 258mm No 35 Multi-Plate Lockup Woven Carbon
GM-RK-408WC 300mm Performance Converter Kit GM 4L60-E, 4L65-E, 4L75-E GM 258mm No 30 Multi-Plate Lockup Woven Carbon
CH-RK-4 Performance Converter Kit Chrysler 727 GM 245mm No 24 Non-Lockup N/A
GM-RK-405 300mm Performance Converter Kit GM 4L60-E, 4L65-E, 4L75-E GM 265mm No 30 Multi-Plate Lockup HTE
CH-RK-3 Performance Converter Kit Chrysler A904 GM 245mm No 27 Non-Lockup N/A
FD-RK-20 Performance Converter Kit Ford 5R110W Ford 5R110W, 6-Stud No 31 Multi-Plate Lockup HTE
BW-RK-4 Performance Converter Kit BorgWarner A618, 47RH, 47RE, 48RE Borg Warner 310mm No 35 Multi-Plate Lockup HTE
GM-RK-16 300mm Performance Converter Kit GM 6L80, 6L90 GM 245mm Yes 36 Single-Plate Lockup N/A
FD-RK-3 10" Performance Converter Kit Ford C4 GM 245mm No 26 Non-Lockup N/A
GM-RK-15 Performance Converter Mounting Ring Kit GM 4L80-E, 4L85-E GM 245mm Yes 35 Single-Plate Lockup N/A
GM-RK-11 298mm Performance Converter Mounting Ring Kit GM 4L60, 4L60-E GM 245mm Yes 30 Single-Plate Lockup N/A
GM-RK-10 298mm Performance Converter Kit GM 4L60, 4L60-E GM 245mm No 30 Non-Lockup N/A
GM-RK-13 300mm Performance Converter Mounting Ring Kit GM 4L60-E GM 245mm Yes 30 Single-Plate Lockup N/A
GM-RK-18 298mm Performance Converter Kit GM 4L60-E GM 245mm Yes 30 Single-Plate Lockup N/A
GM-RK-405WC 300mm Performance Converter Kit GM 4L60-E, 4L65-E, 4L75-E GM 265mm No 30 Multi-Plate Lockup Woven Carbon
GM-RK-495WC 298mm Performance Converter Kit GM 4L60, 4L60-E GM 265mm No 30 Multi-Plate Lockup Woven Carbon
GM-RK-685 JMBX Performance Converter Kit GM 6L80, 6L90 GM 265mm No 36 Multi-Plate Lockup HTE
GM-RK-685WC JMBX Performance Converter Kit GM 6L80, 6L90 GM 265mm No 36 Multi-Plate Lockup Woven Carbon
GM-RK-688WC JMBX Performance Converter Kit GM 6L80, 6L90 GM 258mm No 36 Multi-Plate Lockup Woven Carbon
AL-RK-4 Performance Converter Kit Allison LCT 1000 (Captive Clutch) Allison LCT 1000 (Captive Clutch) Yes 25 Multi-Plate Lockup Lockup HTE
GM-RK-9 298mm Performance Converter Kit GM 200-4R, 4L60, 4L60-E GM 245mm No 27 Non-Lockup N/A
GM-RK-21 Performance Converter Kit GM 6L80, 6L90 GM 6L80, 6L90 JMBX Yes 36 Multi-Plate Lockup Woven Carbon
FD-RK-21 Performance Converter Kit Ford 5R110W Ford 5R110W, 8-Stud No 31 Multi-Plate Lockup HTE
GM-RK-14 10" Performance Converter Mounting Ring Kit GM 350, 400, Powerglide GM 245mm No 30 Non-Lockup N/A
GM-RK-495 298mm Performance Converter Kit GM 4L60, 4L60-E GM 265mm No 30 Multi-Plate Lockup HTE
GM-RK-488 Performance Converter Kit GM 4L80-E, 4L85-E GM 258mm No 35 Multi-Plate Lockup HTE
GM-RK-1S 10" Performance Converter Kit GM 350, 400, Powerglide GM 245mm No 30 Non-Lockup N/A
BWFD-RK-1 Performance Converter Kit BorgWarner, Chrysler A618, 47RH/RE, 48RE Ford 5R110W, 6-Stud Yes 23 Multi-Plate Lockup N/A
CH-RK-2A Performance Converter Kit Chrysler 68RFE Chrysler 68RFE Yes 27 Multi-Plate Lockup HTE
CH-RK-6 Performance Converter Kit Chrysler 68RFE Chrysler 68RFE No 27 Multi-Plate Lockup HTE
AL-RK-3 Performance Converter Kit Allison 1000/2000/2400, Early or 1000/2000/2400, 2006-Later Allison 1000/2000/2400 No 25 Multi-Plate Lockup HTE
GM-RK-688 JMBX Performance Converter Kit GM 6L80, 6L90 GM 258mm No 36 Multi-Plate Lockup HTE
BW-RK-3 Performance Converter Kit BorgWarner, Chrysler A618, 47RH, 47RE, 48RE BorgWarner 310mm No 23 Multi-Plate Lockup HTE
BW-RK-2A Performance Converter Kit BorgWarner, Chrysler A618, 47RH, 47RE, 48RE BorgWarner 310mm Yes 23 Multi-Plate Lockup HTE
AL-RK-2A Performance Converter Kit Allison 1000/2000/2400, Early or 1000/2000/2400, 2006-Later Allison 1000/2000/2400 Yes 25 Multi-Plate Lockup HTE
BW-RK-5 Performance Converter Kit BorgWarner A618, 47RH, 47RE, 48RE Borg Warner 310mm Yes 35 Yes Lockup HTE
AL-RK-5 Performance Converter Kit Allison LCT 1000 (Captive Clutch) 2017-Later Allison LCT 1000 (Captive Clutch) Yes 26 Multi-Plate Lockup Lockup HTE
GM-RK-498 298mm Performance Converter Kit GM 4L60, 4L60-E GM 258mm No 30 Multi-Plate Lockup HTE
GM-RK-22 Performance Converter Kit GM 6L90 GM 6L90 JMDZ Yes 36 Multi-Plate Lockup Woven Carbon
GM-RK-305 265mm Performance Converter Kit GM 350, 400, Powerglide GM 265mm No 30 Non-Lockup N/A
GM-RK-355 265mm Performance Converter Kit GM TH400, Powerglide GM 265mm No 35 No Lockup N/A
GM-RK-308 258mm Performance Converter Kit GM TH350, TH400, Powerglide GM 258mm No 30 Non-Lockup N/A
GM-RK-358 258mm Performance Converter Kit GM TH400, Powerglide GM 258mm No 35 Non-Lockup N/A
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