4L80E Billet “Extended Spline” Input Shaft
The TSI 4L80E billet input shaft has all the latest and greatest updates to make it the strongest on the market. Feed hole changes have been made to make the shaft stronger. The splines that go into the OD planet have been lengthened and the undercut shoulder which has a very small ID has been removed. We also use a hobb to cut this spline compared to others who single point cut them which makes for a weaker spline that is prone to failing. This is the number one spot of failure for other aftermarket billet shafts.
Available in 300M for up to 1000HP and Aermet 100 for higher power applications