National Staff Greg G. Posted March 12, 2018 National Staff Posted March 12, 2018 TECHNICAL BULLETIN 3-12-18 B-pillar Notching for Cage Placement ST1-4 6.2.1 Chassis and Body Modifications to Production Vehicles 1h) "B" pillars of the unibody may be notched to accommodate the placement of roll cage door bars provided that the notched area is welded to the bar(s) that intrude into the B-pillar. ST56.1.3.2 Chassis and Body Modifications 1h) "B" pillars of the unibody may be notched to accommodate the placement of roll cage door bars provided that the notched area is welded to the bar(s) that intrude into the B-pillar. Quote
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