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What is the Chassis Code Breakdown?
    S = Chassis
    R = Fastback
    P = SR20DET
    K = SuperHICAS
    H = KA24E
    M = KA24DE
    C = SuperHICAS (S14)

    Examples:
    S13 = 88.5-90 Silvia, CA18DE(T)
    RS13 = 88.5-90 180SX, CA18DE(T)
    PS13 = 90.5-94 Silvia, SR20DET
    RPS13 = 90.5-98 180SX, SR20DET
    KPS13 = 90.5-94 Silvia, SR20DET, SuperHICAS
    KRPS13 = 90.5-98 180SX, SR20DET, SuperHICAS
    HS13 = 89-90 240SX Coupe, KA24E
    RHS13 = 89-90 240SX Hatch, KA24E
    MS13 = 91-94 240SX Coupe, KA24DE
    RMS13 = 91-94 240SX Hatch, KA24DE
    KMS13 = 91-94 240SX Coupe, KA24DE, SuperHICAS (Canada Only)
    KRMS13 = 91-94 240SX Hatch, KA24DE, SuperHICAS
    S14 = 94.5-98 Silvia/240SX with SR20DE(T) or KA24DE. (No code distinction between JDM/USDM engine differences)
    CS14 - 94.5-98 Silvia, SuperHICAS