Depends what is wrong with your existing rear if you use the 4 channel rear end then you would have to drill a hole on top of the pumpkin for the Abs sensor.
Because a 3 channel only has 1 Abs sensor and a 4 channel set-up has 2 Abs sensors one on the end of each axle.
You can use the 4 channel axles and everything else inside of the rear end on your current rear without doing any modifications though.
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2002 Z/28 = Firemutt Racing 370 w/ Cam, Trick Flow heads, TPIS 90mm Intake & 90mm T.B., Vigilante 3600 t.c., Michael's Transmissions Built 4L60E.
QTP Headers, Mufflex Stainless Y-pipe, Pypes Performance Exhaust, Moser 12-bolt w/ 33 spline axles,Truetrac & 3:73's., Spohn.
Cartek Tuned...
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