ATF's NEW & IMPROVED mid plate adapterThis kit has been tested to well over 2,000 horsepowerFits both 1JZ and 2JZ Toyota engines.The Mid-Plate Adapter is like our standard 1JZ/2JZ Adapter plate expect this plate allows you to tie it to the chassis like a true Mid-plate racers use to stabilize the engine more steadily in place instead of motor mounts. It also helps solidify the chassis. Best if combined with a Front Plate as an option.Front and Midplates help engine longevity and prevent twisting of the engine block. We`ve seen over the years that the JZ engines start to have engine block failures near the 1200 whp mark. It also prevents cylinder bores from becoming oblong from being pulled on either side of the engine block, which will cause piston to wall clearance issues..