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With that minor adjustment, the catalytic pipe slid right up between the lower control arm mount and the 4L70E’s bellhousing. This was the tightest side; the driver side had oodles of room. It’s worth noting that this fitment was achieved with Hooker’s “stock location” LS adapter plates on stock GM clamshell mounts with Energy Suspension inserts. Opting for a different engine placement may create interference issues with the lower control arm.