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2013 ZL1 #7860 · 10-12-2014, 10:44 PM

Why do the upper pulley? If you do the lower you have more pulley size options and it looks less obvious that it was changed. It is also much easier to install IMO

Jannety does the 10% OD lower pulley without a tune (use torco)

10-12-2014, 10:44 PM	#3
2013 ZL1 #7860 Drives: 2013 ZL1 A6 #7860 Join Date: Apr 2014 Location: CO, USA Posts: 1,279	Why do the upper pulley? If you do the lower you have more pulley size options and it looks less obvious that it was changed. It is also much easier to install IMO Jannety does the 10% OD lower pulley without a tune (use torco)