Jason,
The Pistons supplied in the KF and K1 Aero came as 1.2 or 1.3mm I beleive so hence the drilled to 1.6mm for the rear shocks
Ive not got the KF2 so didn't even know the kit came with 1.5 and 1.6mm pre-drilled pistons, although I can't seem to find a part number as yet !
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