This kind of science is standard practice for racing engines, but rarely do OEM's go to the effort to boost their engines' performance with exhaust tuning. Well now, Vanagon waterboxer drivers can benefit from race technology, and replace their entire exhaust system with a long-lived, beautiful all-stainless system that will increase driving pleasure for years and years. The Tri-Y design is more challenging to design and build, but it produces a broader torque curve than a racing-type 4-into-1 collector system, just what is needed to enhance flexibility in on-road vehicles. This system will fit a 2.1L.
And by the way, the sound is awesome!
*Compliance with your state's emissions requirements, if any, are the sole responsibility of the buyer/installer.