These are replacement crossdrilled discs for our Lightweight 2-Piece Formula Car Brake Rotors, Part Nos. 3540-01 through 3540-06. All of these rotors measure 0.285" thick and have a 6x140mm bolt circle for attachment to a special hat using countersunk 1/4" Allen screws (hat and hardware sold separately). Ferrous construction complies with SCCA Club Racing rules.
Part No. 3541-01 fits Part Nos. 3540-01 and 3540-03 and is generally used with LD19 calipers.
Part No. 3541-02 fits Part Nos. 3540-02 and 3540-04 and is generally used with LD20 calipers.
Part No. 3541-03 fits Part Nos. 3540-05 and 3540-06 and is sometimes used with LD20 calipers.
All of these discs are are legal for SCCA Formula Ford, Formula Continental, Sports 2000, and Club Formula Ford.
Matching parts available separately: