This Axle-Back system includes the AFM valves but does NOT include the NPP valves. It should be used on vehicles that are NOT equipped with NPP. BORLA(r) Cat-Back(tm) & Axle-back exhaust systems feature patented straight-through and multi-core technology to unleash hidden horsepower.
Wanted an upgrade from stock non npp exhaust but didn’t want it obnoxiously loud. This system nailed it. Barks when you want it to but doesn’t upset the neighbors.