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This collectioin includes 1 tie rod, 1 guide arm and 2 steering knuckles, which are frontend parts included in Chassis Kit CK3. All of these parts have one or more small diameter pins/posts, which if broken, render the chassis inoperable. They are vulnerable to being bent or broken during assembly or racing without a body, but very unlikely to break when protected by a body.
The guide arm can also be used in Chassis CK1,CK2, CK4, CK5, and CK6. The tie rod and steering knuckles of SP3 are not interchangeable with those in CK1, CK2, CK4, CK5 or CK6.
The 4 parts can be separated easily with a sprue cutter.