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See Turbine Hub Insert Sortable Details Chart
 
Gm i 30f

298mm LU (250C, 350C, 200-4R, 4L60 & E)

Turbine Hub Insert GM-I-30F

  • Material: Steel
  • Internal Spline Tooth Count: 30
  • External Spline Tooth Count: 30
Gm i 31

298mm LU (250C, 350C, 200-4R, 4L60 & E)

Turbine Hub Insert GM-I-31

  • Material: Steel
  • Internal Spline Tooth Count: 30
  • External Spline Tooth Count: 30
Gm i 27f

245mm LU (3T40, 3L30, 200C, 4T60-E, 4L60 & E:S-10 only)

Turbine Hub Insert GM-I-27F

  • Material: Steel
  • Internal Spline Tooth Count: 27
  • External Spline Tooth Count: 30
Gm i 27b

298mm LU (250C, 350C, 200-4R, 4L60 & E)

Turbine Hub Insert GM-I-27B

  • Material: Steel
  • Internal Spline Tooth Count: 27
  • External Spline Tooth Count: 30
Gm i 27fl

245mm LU (3T40, 3L30, 200C, 4T60-E, 4L60 & E:S-10 only)

Turbine Hub Insert GM-I-27FL

Can be used as a conversion in early style 245mm converters

  • Material: Steel
  • Internal Spline Tooth Count: 27
  • External Spline Tooth Count: 30