
This NAPA auto parts ad for a NAPA exhaust system, featuring PROTO-1, was found by Chris Miles in a 1979 parts flyer for NAPA Auto Parts store owners, Vol. 47, No. 11 January 1979 was printed for Rock Rapids Auto Parts at 108 South 2nd Ave. in Rock Rapids, Iowa.

We made it sound as good as it looks.
The world’s newest production sports car. Contemporary European styling. Newly developed high performance engine. The DeLorean Motor Car.
Why did DeLorean, a former director of advanced engineering at General Motors, choose us to design the exhaust system?
Quite simply, because we had the expertise to do the job. The same kind of
expertise it takes to design and build thousands of different exhaust systems for the aftermarket… for your customers.NAPA systems are designed to fit …to fit various engine characteristics and body configurations.
It makes your job easier. And your customers happier.
What’s more, NAPA systems complement the type of car they’re designed for. So a performance car exhaust system sounds powerful. And a luxury car has its own quality sound.
DeLorean came to us not only because he wanted a top quality exhaust system. He also wanted one that performs as well as his car does.
America’s Finest Exhaust System
