Ever since the first “W” block engine rolled off the assembly line in 1958, Big Block Chevrolet engines have been known for producing incredible horsepower and stump-pulling torque. Since then, Big Block Chevy engines –also known as “rat” motors, have delivered superb street, track, and marine performance for everything from offshore racing boats to Mid Year Corvettes.   

The EFI experts at FAST™ have a wide variety of components to help you build the injected rat motor of your dreams. Whether your goal is to retrofit a bone stock TBI big block into your street rod or off road vehicle using one of our Perfect Circuit™ OEM-configuration wiring harnesses, or to run a 16-injector dragstrip dominating beast using our race-winning XFI™ standalone EFI system, Fuel Air Spark Technology™ has got the answer. And when you take that answer and back it up with incomparable customer service and technical support you can’t lose with FAST products.