Frankenstein M311 Rocker Arm Stand - Machined Billet - GM LS-Series Trailer Components & Accessories 437 in Bolt Circle

437 in Bolt Circle

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Frankenstein M311 Rocker Arm Stand - Machined Billet - GM LS-Series Trailer Components & Accessories 437 in Bolt CircleProduct Description: Rocker Arm Stand M311 Aluminum Machined LS3 GM LS Series A designer and manufacturer of top quality high performance cylinder heads and intake manifolds for GM's popular LS series engines as well as other performance powerplants, Frankenstein Engine Dynamics specializes in taking a high output engine to the next level. They also offer premium camshafts and valvetrain components designed for maximum performance and reliability.