A'PEXi - N1 Evo Extreme (Catback) - 2017-2021 Honda Civic Si [FC1/FC3]

APEXi SKU: 164KH002

$1,099.00 $1,299.00 Save $200

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Model: FC1 4-Door Sedan * IN STOCK *
FC1 4-Door Sedan * IN STOCK *
FC3 2-Door Coupe * IN STOCK *

Only 5 left!

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.


  • N1 EvX titanium tips specially designed with clearance to reduce heat transfer
  • Top Level quality using full tig-welded SUS304 stainless steel 
  • Matched and manufactured for select chassis
  • A'PEXi intricate designed brackets
  • Resonated midpipe structure
  • Compatible with A'PEXi GT Frontpipe (SKU: 145-H001)
  • Comfort with optimal performance gains
Bolt-On Yes
Part Number
  • FC1 - 164KH002
  • FC3 - 164KH001
Year 2017, 2018, 2019, 2020, 2021
Make Honda
  • Civic Si Sedan
  • Civic Si Coupe
Body Style
  • FC1 - 4 Door Sedan
  • FC3 - 2 Door Coupe
Engine L15BA (Turbo)
  • FC1 - 4 Door Sedan
  • FC3 - 2 Door Coupe
Exhaust Type N1 Evolution Extreme Muffler (N1-X)
Piping Diameter 3inch
Tip Diameter 105mm. x 2
Pieces 3
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
Notes ***Optional Frontpipe Sold Separately (Part No. 145-H001)
WARNING: California Prop 65
Cancer & Reproductive Harm