The iconic W-Series big block engines from General Motors could always be spotted by the uniquely shaped heads and rocker covers for a distinctive appearance. Three different variations of the W-Series engines existed with the 348, 409, and 427 big block. Arguably the most popular of the three was the high performance 409, built with drag racing and high torque loads in mind. Today, the 409 is still a highly sought after engine for restorers, rodders, and racers. The folks here at Speedway Motors know what it takes to bring that old school big block back to life and you can be sure to find what you’re looking for with only the top brands and parts you need for your classic W-Series big block Chevy.