A'PEXi - N1 Evo Extreme (Axleback) - 2017-2020 IS300 / IS350 [RWD/AWD]



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Tip Style: Stainless Steel
Stainless Steel

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2017- 2020 Lexus IS300 AWD/RWD
2017 - 2020 Lexus IS350 AWD/RWD

The N1 Evolution Extreme is based on the proven performance basics of the N1 muffler which emphasizes optimum exhaust efficiency utilizing a straight-thru layout design. Equipped with an internal hybrid silencer uniting power and free flowing characteristics with effective functional sound resonance. A newly adopted muffler tip completes the tail end of the exhaust that serves both purposes of function and form. Constructed with a light weight titanium material rolled and riveted onto a double pipe structure which acts as a diffuser enabling temperature reduction, meanwhile retaining a sporty heat gradation appearance.


  • 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
Bolt-On Yes
Part Number
  • 164-KT13 - Titanium
  • 164AKT13 - Stainless Steel
Year 2017, 2018, 2019, 2020
Make Lexus
Model IS300, IS350 AWD, IS350 RWD
Body Style 4-Door Sedan
Engine 2GR-FSE, 8AR-FTS
Chassis ASE30, GSE31, GSE36, GSE37
Exhaust Type N1 Evolution Extreme Muffler (N1-X)
Piping Diameter 60.5mm. x 2 -> 50mm. x 4
Tip Diameter 93mm. x 4
Pieces 2
Exhaust Tip Style Titanium Round- Dual wall rolled, Angle cut (Riveted)
Piping Material SUS304 Stainless Steel
Muffler Material SUS304 Stainless Steel
Muffler Tip Material
  • Titanium
  • Stainless Steel
System Weight Rear Section only 32.75.0 lbs. (Stock- 38.75 lbs.)
Sound Level Sound Level: 81.6 dB @ 4,500 RPM. Modular design
Special Notes Midpipe and Rear Section can be interchanged with factory exhaust components. NOTE: Do not use harsh chemicals or metal polish cleaners when cleaning titanium tips. We recommend using standard isopropyl alcohol
WARNING: California Prop 65
Cancer & Reproductive Harm