Equipped with the newly designed pressure plates & middle plate(s), Spec II can provide a very comfortable driving with much less pedal effort than before or offer a significantly higher torque delivery with the same pedal effort as the previous version.

The new version also offers more choices on the clamping rate from 1,100 kg . The Prospec II (Single carbon) w/ 1,600 kg clamping rate achieves the rated horse power of 390 at the wheel with a lighter pedal effort than the previous Prospec w/ 1,000kg clamping rate. Moreover, the Spec II twin carbon clutch w/ 2,300kg clamping rate is rated at a whopping 900 hp with the same pedal effort of the previous 1,350kg model. In 2010, ATS added Prospec II (Single carbon) 2,400kg which boasts 550 hp rating (at the wheel) with lighter than stock pedal effort.

For an acutal example, the stock pedal effort of Nissan 350Z HR is around 13kg. With the previous spec I carbon clutch, even though you choose a ligther clamping rate of 1,100kg, the pedal effort is around 15kg. (you will definately feel the increase of the pedal effort compared with the stock clutch). However, if you choose the carbon twin spec II (CN23H2160-11), with the same clamping rate, the pedal effort is less than 13kg. You would love the light pedal effort!

The following is a comparison table

Clutch model	# of discs	Clamping rate (kg)	Pedal Effort	Rated HP (at the wheel)	Leverage factor
Prospec	Single	1,000	-10 % to 0 % of stock	250	1
Prospec	Single	1,300	0 % to +20 % of stock	340	1
Prospec	Single	1,600	+30% to +50% of stock	400	1
Old	Twin	1,100	0 % to +20 % of stock	600	1
Old	Twin	1,350	+30% to +50% of stock	740	1
Old	Triple	1,100	0 % to +20 % of stock	900	1
Old	Triple	1,350	+30% to +50% of stock	1100	1
Prospec II	Single	1,600	-10 % to 0 % of stock	390	2
Prospec II	Single	2,200	+0% to +20% of stock	500	2
Spec II	Twin	1,100	-10 % to 0 % of stock	600	1.35
Spec II	Twin	1,400	-10 % to 0 % of stock	740	1.73
Spec II	Twin	1,500	0 % to +20 % of stock	800	1.35
Spec II	Twin	1,800	+30 % to +50 % of stock	930	1.35
Spec II	Twin	1,900	0 % to +20 % of stock	950	1.73
Spec II	Triple	1,100	-10 % to 0 % of stock	900	1.35
Spec II	Triple	1,400	-10 % to 0 % of stock	1,150	1.73
Spec II	Triple	1,500	0 % to +20 % of stock	1,200	1.35
Spec II	Triple	1,800	+30 % to +50 % of stock	1,300	1.35
Spec II	Triple	1,900	0 % to +20 % of stock	1,300	1.73
Porsche
Old	Single	1,200	+20% to +40% of stock	340	1
Old	Twin	1,100	+20% to +40% of stock	600	1
Old	Triple	1,100	+20% to +40% of stock	850	1
Prospec II	Single	2,000	+20% to +40% of stock	480	2
Spec II	Twin	2,000	+20% to +40% of stock	850	2
Spec II	Triple	2,000	+20% to +40% of stock	1,200	2

Go to the application list - click here

Twin carbon clutch	Triple carbon clutch