A'PEXi - N1 Evo Extreme (Axleback) - 2013-2020 Lexus GS350



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Tip Style: Stainless Steel
Stainless Steel

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N1-X Evolution Extreme Muffler Axleback Exhaust (Titanium Tip) 
2013-2020 Lexus GS350 RWD/AWD

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.


  • 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
***NOTE: Requires Aftermarket Rear Bumper Lip Spoiler for fitment compatibility or modification/trimming of OEM Factory Rear Lower Diffuser Panel***

Bolt-On Yes
Part Number
  • 164-KT07 - Titanium Tips
  • 164AKT07 - Stainless Steel Tips
Year 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
Make Lexus
Model GS350 AWD, GS350 RWD
Body Style 4-Door Sedan
Engine 2GR-FSE
Chassis GRL10, GRL11, GRL15
Exhaust Type N1 Evolution Extreme Muffler (N1-X)
Piping Diameter 60.5mm. x 2
Tip Diameter 93mm. x 4
Pieces 2
Exhaust Tip Style
  • Titanium Round - Dual wall rolled, Angle cut (Riveted)
  • Stainless Steel  - Dual wall rolled, Angle cut (Riveted)
Piping Material SUS304 Stainless Steel
Muffler Material SUS304 Stainless Steel
Muffler Tip Material
  • Titanium
  • Stainless Tip
System Weight 33.50 lbs. (Includes Full Exhaust System, gaskets and hardware pack) (Stock- 33.70 lbs.)
Sound Level Sound Level: 89.7 dB @ 4,500 RPM.
Special Notes Modular design-> Midpipe and Rear Section can be interchanged with factory exhaust components - NOTE: ***Requires Aftermarket Rear Bumper Lip Spoiler for fitment compatibility***
WARNING: California Prop 65
Cancer & Reproductive Harm