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The lotus calipers fit up to 12.8 inch rotors and are made of a cast Al shell. These were stock on the Viper and lower end Porsches and do not offer any significant improvement over the stock NSX setup. The next size up is the F-40 (also cast shell), which can also be found on the 930 and 996 TT. These are made for bigger rotors, up to 328mm (13"). Next comes the "Indy" (Comptech) calipers, dimensionally identical in application as the "F40". The next step up is this HUGE 4 pot caliper which I have no idea what it is called, also billet and good for 355 mm rotors. Next after that are the 8 piston billet calipers good for 380 mm (15 inch) rotors. I have the 8 pistons in front.

[QUOTE="lowellhigh79, post: 159122, member: 7098"] The lotus calipers fit up to 12.8 inch rotors and are made of a cast Al shell. These were stock on the Viper and lower end Porsches and do not offer any significant improvement over the stock NSX setup. The next size up is the F-40 (also cast shell), which can also be found on the 930 and 996 TT. These are made for bigger rotors, up to 328mm (13"). Next comes the "Indy" (Comptech) calipers, dimensionally identical in application as the "F40". The next step up is this HUGE 4 pot caliper which I have no idea what it is called, also billet and good for 355 mm rotors. Next after that are the 8 piston billet calipers good for 380 mm (15 inch) rotors. I have the 8 pistons in front. [/QUOTE]

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