Apr 21, 2021 Leonard's Express in Rochester, New York has been using less fuel on SPI.System's SPIER System, an exhaust induction system. SPI.Systems As fleets push to improve fuel economy, cut emissions and lower maintenance costs, a company in New York is reporting they’ve done all three using an exhaust induction system. The SPIER System from SPI.Systems in Rochester, New York is a fairly simple bolt-on device that routes exhaust from a diesel truck’s tailpipe back to the engine where it’s introduced into the combustion chamber. The SPIER System uses a 'Y' pipe to draw on exhaust which is routed to the engine compartment where it's utilized during combustion. The system weighs roughly 30 pounds.SPI.SystemsThe result is a more thorough combustion process according to SPI.Systems CEO Jack Schickler, a chemical engineer who added that the patent-pending SPIER System also improves engine power particularly under demanding loads.