"How To....."CV Variations (February 01, 2017)
With all the variations out there available to run on a VW this information might be helpful to some. The CV line up pictured in order, consists of a Type 1 (Bug) Type 4 (Porsche 924/944/VW Thing-181) Type 2 (Bus) 
Porsche 930. 
Spline Number The Type 1, 2, and 4 - CV spline count for the axle hole is 33.
The Porsche 930 - CV spline count for the axle hole is 28. Maximum Angularity for each CV is listed below Type 1 is 12 degrees Type 2 is 17 degrees Type 4 is 22 degrees Porsche 930 is 25 degrees    
Type 1 = 94mm Type 4 = 100mm Type 2 = 100mm 930 = 108mm
   
Type 1 = 32.14mm Type 4 =34.02mm Type 2 = 32mm 930 = 40.19mm
   
Type 1 = 60.31mm Type 4 = 67.53mm Type 2 = 67.52mm 930 = 73.21
   
Type 1 = 49.86mm Type 4 = 55.93mm Type 2 = 55.93mm 930 = 59.89mm
   
Type 1 = 24mm Type 4 = 28mm Type 2 = 28mm 930 = 28mm
   
Type 1 = 60.21mm Type 4 = 67.34mm Type 2 = 67.31mm 930 = 72.84mm
   
Type 1 = 28.53mm Type 4 = 32mm Type 2 = 35.95mm 930 = 36.80mm
   
Type 1 = 46.91mm Type 4 = 53.45mm Type 2 = 52.31mm 930 = 56.22mm
   
(15.90mm) (17.5mm) (20mm) (22.22mm)
Type 1 = .625" Type 4 = .688" Type 2 = .787" 930 = .875"
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