Milodon set of ductile iron 4-bolt main caps. Caps are straight design (not splayed), and can be used in place of existing straight 4-bolt caps or 2-bolt caps. Includes 3 caps (Journals 2, 3, and 4) and hardware. Iron caps increase the strength of your engine build. Fits the following:
87-97 1-pc Rear Main Seal 350 engines
92-97 LT1 engines
NOTE : Whenever changing main caps, you must have the block align bored to ensure proper crankshaft installation.