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.

PRODUCT FEATURES:

• 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 (2014-2016), and 164-KT13 (2017-2020).

Bolt-On	Yes
Part Number	144-KT02 (RWD) 144-KT09 (AWD)
Year	2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026
Make	Lexus
Model	IS250, IS300 (V6-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.
Gasket Replacement	- Front Section (Header to Midpipe) x2 - P106 x D66.5: 3901-0700  - Mid Section (Center of the Midpipe Kit) x2 - P97 x D66.5 : 3901-1660 - Rear Section (Connecting to Rear Axleback) : Factory OE Donut Gasket (Lexus OE Factory product)
	WARNING: California Prop 65 Cancer & Reproductive Harm  www.p65warnings.ca.gov