In terms of pure performance, the Buick Regal probably doesn't rank highly on most people's list. However, it was built on the versatile G-Body platform which allows for various engine swaps and a litany of performance parts to bolt right in. GM knew this too as the humble Regal was the base for the legendary Buick Grand National.

Hays Twister 3/4 Race Performance Torque Converters are intended for street/strip combinations. Each designed to accommodate any mixture of modifications including higher compression ratios, aftermarket camshafts, aftermarket cylinder heads, lower gear ratios, and vehicle weight loss.