15.10.L. Engine cooling radiators may be replaced with alternate parts
subject to the following restrictions:
1. Radiator core dimensions (width, height, thickness) must be no smaller than the standard part.
2. Radiator must mount to OE radiator mounts.
3. Fluid capacity and dry weight of the radiator must be no less than that of the standard part. Installation of an alternate radiator may serve no other purpose (e.g. to allow a cold air intake passage).
15.10.M. The engine fan and fan shroud (unless it serves another purpose, e.g., as an alternator/generator mount) may be removed, modified or replaced. Electrically driven fans are allowed. Flex fans are not allowed.
Radiators can be upgraded in SP now.
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