National Staff Greg G. Posted May 20, 2022 National Staff Share Posted May 20, 2022 (edited) Technical Bulletin 5-20-22: Subframe Modification for Engine Swaps--All ST & TT ST1-4 Rules: 6.2.1.1e ST5-6 Rules: 6.1.3.1d Notching of the OEM sub-frame/cross-member for the specific purpose of engine swap fitment only is permitted. Revised Rule ST1-4: 1e) Modifications of non-subframe/non-suspension cross-members (other than the rear frame cross beam), transmission mounts, differential mounts, engine mounts, and radiator core supports are permitted. Notching of the OEM sub-frame/cross-member for the specific purpose of engine swap fitment only is permitted. Revised Rule ST5-6: 1d) Modifications of non-subframe/non-suspension cross-members (other than the rear frame cross beam), transmission mounts, differential mounts, engine mounts, and radiator core supports are permitted. Notching of the OEM sub-frame/cross-member for the specific purpose of engine swap fitment only is permitted. Edited May 21, 2022 by Greg G. Quote Link to comment Share on other sites More sharing options...
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