I have been tearing away at the rulebook all night and composed a list of modifications eligible for my car (240SX) however I have come to a couple things that need some experienced/professional opinions.
First off, I am going off the 2013 Solo Rules Book regarding brakes in the ST category. I see no subclass ST specifications (STS, STX, etc.) regarding this so I assume it is allowed in ALL ST classes?
A. Non-standard brake rotors may be used provided they are of equal or larger dimensions (diameter and thickness) and made of ferrous material (e.g., iron). Thickness includes the individual plates of a vented rotor, as well as the overall dimension. The diameter for replacement rotors is measured at the minimum outside dimension. Aluminum rotor hats are allowed. Cars originally equipped with solid (non-vented) rotors may utilize vented rotors. Cross-drilled and/or slotted brake rotors may be fitted provided all such voids are within the disc area and comprise no more than 10% of that area. Brake calipers and mounting brackets may be replaced provided they bolt to the standard locations and the number of pistons is equal to or greater than standard.
What I get from this is I can use any front 2-piece bolt-on big(ger) brake kit and remain in the STS class?
I have only read on forums dated back from 2002-2010 about this and how brake swaps (Z32, Q45) puts you in STX class, but I have never actually seen a "CURRENT official publication" of this. Can someone please point me in the right direction?
Another question I have is are stock seatbelt modifications legal? Different retractors, and UPPER belt mounting point? Same buckle, buckle mounting point, and LOWER belt mounting point.