This link (also the very first sticky thread in this forum!) will list the various options with the amount of lowering the manufacturer advertises it at:
http://www.ft86club.com/forums/showthread.php?t=8739
Because of the design of the rear suspension, you will get more negative camber by lowering the car, period. The lower you go, the more it will increase. The front won't change much at all by lowering.
You can get some kits to help remove that negative camber in the back, but people tend to want more (within reason) up front.
Currently the biggest drop from a lowering spring would be the Eibach Sportlines with 1.4" of drop.
Are you sure you really want to go crazy low?
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-Dave
Track cars: 2013 Scion FRS, 1998 Acura Integra Type-R, 1993 Honda Civic Hatchback
DD: 2005 Acura TSX
Tow: 2022 F-450
Toys: 2001 Chevrolet Corvette Z06, 1993 Toyota MR2 Turbo, 1994 Toyota MR2 Turbo, 1991 Mitsubishi Galant VR-4
Parts: 2015 Subaru BRZ Limited, 2005 Acura TSX
Projects: 2013 Subaru BRZ Limited track car build
FS: 2004 GMC Sierra 2500 LT CCSB 8.1/Allison with 99k miles