Thanks to its popularity, the 4-4-2 was now its own standalone model as opposed to a trim level for the Cutlass. Initially offered with a 400 cubic inch engine claiming 350 horsepower, GM took the gloves off for 1970, allowing Oldsmobile to stuff in its 455 cubic inch big block between the A-body's frame rails. If you believe that there is a replacement for displacement, our LS swap systems might be right up your alley.

Holley is home to some of the top-performance exhaust brands in the world. Brands like Flowmaster, Hooker BlackHeart, Hooker Classic, Flowtech, APR, Dinan, and Flowmonster combine to cover thousands of applications and a variety of budgets. Whether you are putting a full stainless steel exhaust on your late-model muscle car or if your rat rod needs a set of Lakester headers, Holley’s exhaust brands have you covered.