Audi B5 S4 Billy Boat Exhausts

Pre-cat. Post-cat. Billy Boat has two new custom exhaust systems for B5 S4; a new Downpipe Kit and a Stealth Exhaust system.

The Downpipe Kit feeds turbo outlet gases through two flex pipes to your choice of downpipes--with front catalysts--or without.

The Stealth Exhaust adds a special lower--but not louder--note to your exhaust sound that won't make you crank up the radio volume! Its bass voice is masculine, not annoying.

As you expect, everything is polished stainless steel, TIG welded and ready to bolt in place. Just what you'd expect from ECS.