Rotary Nirvana. RX-7 Heaven. The Best Yet. SevenStock X was the place to be last weekend if you even remotely consider yourself a Rotorhead. The event started 10 years ago as a little BBQ, the first large get together of the SoCal RX-7 club. Since 1997, many things have changed. The club exploded in membership, changed their name to SoCal RX Club, and they turned the yearly little BBQ to the largest Rotary Event in the WORLD! Not only was this a special anniversary of the event, but it is also a special anniversary of the Rotary Engine at Mazda. In 1967, the rotary powered Mazda Cosmo 110s was introduced to the world. 40 years later, the rotary revolution is going strong, and SevenStock marked the dual anniversary in a spectacular way, with the theme centered on rotary heritage.