N1-X Evolution Extreme Midpipe
2022+ Lexus IS500

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 powerband. 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-KT21 (Titanium Tips) or 164AKT21 (Stainless Steel Tips)

Bolt-On	Yes
Part Number	- 144-KT13: Resonated - 144-KT13P: Non-Resonated
Year	2022, 2023, 2024, 2025
Make	Lexus
Model	IS500
Body Style	4-Door Sedan
Engine	2UR-GSE
Chassis	USE30
Exhaust Type	N1 Evolution Extreme Muffler (N1-X)
Piping Diameter	65mm. x 2 - 50mm. x 4
Pieces	3
Piping Material	SUS304 Stainless Steel
System Weight	Mid-pipe only 25.90 lbs. (Stock- 35.50 lbs.) 7.6 lbs. lighter than OEM
Special Notes	Sound Level (with part # 164-KT21 or 164AKT21): Resonated- 93.1 dB, Non-Resonated- 95.7 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 - P105 x D66.5: 3901-1650  - 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