Here is the rule concerning the sub-frame connectors in Street Prepared and Street Modified:
E. Longitudinal (fore-aft) subframe connectors (“SFCs”) are permit-
ted with the following restrictions:
1. They must only connect previously unconnected boxed frame
rails on unibody vehicles.
2. Each SFC must attach at no more than three points on the
unibody (e.g. front, rear, and one point in between such as a
seat mount brace or rocker box brace).
3. SFCs must be bolted or welded, but welding must be to the
OE subframe stampings, not to the floor pan in between.
4. No cutting of OE subframes or floorpan stampings is permit-
ted. Drilling is permitted for mounting bolts only.
5. No cross-car/lateral/triangulated connections directly be-
tween the driver’s side and passenger’s side SFCs are permit-
ted. Connections to OE components such as tunnel braces or
closure panels via bolts are allowed and count as the third
point of attachment. No alteration to the OE components is
permitted.
6. SFCs may not be used to attach other components (including
but not limited to torque arm front mounts or driveshaft
loops) and may serve no other purpose.
With the cam, you are in Street Modified. If the sub-frame connectors do not meet the above rules, you are in C Prepared or E Modified.
2002 Mercedes C230k, retired, 2005 Nationals STU DFL
1969 Beach Solo Vee and 1985 Lynx B Solo Vee