Apexi N1-X Evolution Extreme Midpipe Resonated Style for 22 Lexus IS500 (144-KT13) 1659 utilizing an H-style piping design

utilizing an H-style piping design for balanced exhaust pressure

increased responsiveness

A new high performance oil cooler that can be used both internally as well as externally on any vehicle with its universal design configuration

as well as the calculated pressure drop and a trendline

Apexi N1-X Evolution Extreme Midpipe Resonated Style for 22 Lexus IS500 (144-KT13) 1659 utilizing an H-style piping designThe N1 Evolution Extreme is based on the proven performance basics of the N1 muffler. Optimum exhaust efficiency is achieved through the mid pipes running parallel between the catalytic converter and rear muffler section. The H style piping design was opted to equalize the pressure in both exhaust pipes. Our unique modular design allow the mid pipes to be interchangeable with the factory OEM exhaust system components along with the rear section which