N1-X Evolution Extreme Midpipe - 2014+ Lexus IS250 / IS350, 2016+ IS300 (V6-AWD)

APEXi SKU: 144-KT02


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N1-X Evolution Extreme Midpipe Kit (Resonated)
2014+ Lexus IS250/IS350 AWD/RWD

The 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 is sold separately.


  • High-level of quality using tig-welded SUS304 stainless steel uniting quiet performance with high-power performance gains
  • Matched and manufactured for select chassis
  • Patented Megaphone piping structure to produce excellent torque and throttle response throughout the power-band. This piping design allows for a swirling exhaust gas flow effect that has for years produced proven results
  • Compatible with the N1-X Evolution Extreme rear section part number 164-KT02
Bolt-On Yes
Part Number 144-KT02 (RWD), 144-KT09 (AWD)
Year 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
Make Lexus
Model IS250, IS300 (AWD), IS350
Body Style 4-Door Sedan
Engine 2GR-FSE, 2GR-FKS
Chassis GSE31
Exhaust Type N1 Evolution Extreme Muffler (N1-X)
Piping Diameter 65mm. x 2
Pieces 3
Piping Material SUS304 Stainless Steel
System Weight Mid-pipe only 27.67 lbs. (Stock- 32.52 lbs.) 4.85 lbs. lighter than OEM
Special Notes Sound Level (with part # 164-KT02): 87.0 dB @ 4,500 RPM. Modular design-> Mid-pipe and Rear Section can be interchanged with factory exhaust components.
WARNING: California Prop 65
Cancer & Reproductive Harm