There are only two different Cobalt Knuckles: ALL FE1, FE3 and 2005-2007 FE5 use one knuckle, and 2008-up FE5 use a different knuckle. They are easily visually distinguished. The 2nd design FE5 has significantl;y more material and lacks the sharp machined edges near the brake and hub mounts.
While it may be hard to do so, it must be remembered that brake systems and suspension systems arent directly related. IE: Not all FE1 cars have the same brake system.
Brake system RPO's are:
J41=frt disc, rr drum 4x100 wheels, 256mm x 23.69mm front rotors, 50mm single piston iron calipers, 9.06" rear drums (LS/LT)
JM4=ABS frt disc, rr drum. Same as J41 but with ABS (LS/LT w/ABS)
5 Lug JM4= ABS frt disc, rr drum, 5x110 wheels, 276mm x 23.69mm rotors, 52mm single piston iron calipers, 9.06" drums (LT w/ABS and upgraded wheels, LT2, 2009 LT2 Sport)
JL9=ABS 4 wheel disc, 5x110 wheels, 296mm x 26mm frt rotors, 54mm single piston iron calipers, solid 270mm x 14mm rear rotors, 38mm single piston iron calipers.(SS/SC, SS/NA, 2.4L Sport)
JL9/LNF= ABS 4 wheel disc, 5x110 wheels, 315.5mm x 26mm frt rotors, 38mm 4 piston Brembo aluminum calipers, vented 292mm x 19.9mm rear rotors, 40mm single piston iron calipers(SS/TC)
Originally Posted by Halfcent
1. If you change the front anti-sway bar, you must also change the mounts and clamps due to the different diameter.
In order to change an FE1 car over to an FE5 front antisway you must order 2005 SS/SC insulators, 2006-up FE3/5 cars use a "2 bolt" clamp and an insulator with a "hump" in it. ALL FE1 cars use a "1 bolt/1 slot" clamp, and insulators with "no hump" The 2005 SS/SC clamps/insulators are the only parts that allow a proper mod free install of an FE5 bar in an FE1 car.
Insulator(no hump FE5)= 22700091
You can install the new style 2 bolt clamps and insulators(recommended for serious racing) but you will have to order the the 2 bolt clamps and a new front frame.(these parts have a list price of over $600)