I've the fidanza aluminium flywheel (4.7kg) and the problem u might encounter is that the car tends to stall while driving. U will have to be real quick in gear-shifting as the revs drop pretty fast since the flywheel is light. Since u r running on a PFC, sean might be able to put up the idle a bit or if u r handy with your PFC, pretty much u could do it yourself.

Cons on this flywheel is that some might find it too light, and not at hardy as a chromolly one and being aluminium, it might have a tendancy of warping. The aluminium flywheel will require a change in the surface plate each time u change a clutch (which is expensive) while the chromolly one will just need machining.

Depending on driving style, i will be swayed towards a slightly heavier chromolly one which is about 7-8kg (still a lightened flywheel) for durability, drivability and ease of maintenance.
Talk to Scott at AutoClutch in Osborne Park.. Top block when it comes to his department on driveline.

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