While the F-150s roots start in the 1940s, 1975 marked the introduction of the F-150 name. Introduced as a heavier duty variant of the F-100, the 150 would fully replace the 100 in 1984. Since then, the F-150 has been the best selling F-Series truck, and F-Series trucks have become the best selling line of trucks in the world.

The muffler that started it all, the original 40 Series Muffler is an aggressive sounding street/strip muffler that delivers a powerful “Flowmaster Sound” you’ve heard so much about it. If you really want to hear your exhaust system and that great muscle car tone – from both inside and out of the vehicle – the 40 Series is for you.