SKU: 51130017489

Apexi N1 Evo Extreme Catback Exhaust - 17-21 Civic Si

Sale price$555.32 Regular price$617.02
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Ships within 48 hours · Estimated delivery Aug 9 - Aug 14

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Description

Apexi N1 Evo Extreme Catback Exhaust - 17-21 Civic SiThe 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

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.

PRODUCT FEATURES:

  • 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
  • SUS304 Stainless Steel
  • Piping Diameter - 3inch / Tip 105mm. x 2

Images used for illustration purposes. Product will vary per vehicle application.

    Shipping Notes
    • Free Standard Shipping on $100+ Orders to the USA.
    • Except Preorder products are shipped in 48 hours.
    • Delivery to the USA:
    1. Standard Shipping : 3-10 business days
    • If time is of the essence, please consider selecting expedited delivery for faster service.
    Exchange/Return Notes
    • We offer a 30-day return/exchange service after receiving.
    • Final sale items are not eligible for returns or exchanges.
    • To process your return/exchange, please contact us at [email protected]
    • Please click here for more details>>> Return & Exchange Policy
    SKU: 51130017489

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    Kevin March
    Chelsea, US
    ★★★★★ 4
    Great product
    Size: Large, Color: (035) Steel / White / Black
    Comfortable fit perfect
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    Reviewed in the United States on March 15, 2026
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    Wesley
    Houston, US
    ★★★★★ 5
    Quality No Show Socks That Are Comfortable and Durable
    Size: Large, Color: (100) White / White / Black
    These Under Armour no show socks are great for everyday training and casual wear. The cotton blend feels comfortable and they stay in place throughout the day. Getting six pairs in a pack is solid value for a quality brand. They hold up well after multiple washes and the no show style works great with most athletic shoes. A reliable go-to sock.
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    Reviewed in the United States on April 30, 2026
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    Hanson
    Battle Creek, US
    ★★★★★ 5
    Comfortable
    Size: Large, Color: (001) Black / Black / White
    I recently picked up a pair of Under Armour socks, and they’ve quickly become my go-to choice for daily wear and workouts. From the first wear, the fit felt snug and supportive without being too tight. The fabric is lightweight yet durable, and it does a great job wicking sweat — keeping my feet dry even during longer runs or intense gym sessions. One of the things I appreciate most is the arch support and cushioning in the right places. It adds just enough padding where I need it, especially under the ball and heel of the foot, which makes a noticeable difference on days when I’m on my feet a lot. The socks also have a nice breathable mesh pattern that improves airflow.
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    Reviewed in the United States on January 4, 2026
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    Justin
    Houston, US
    ★★★★★ 5
    Great Socks.
    Color: (002) Black / Black / Halo Gray, Size: Large
    These are awesome and have become my favorite socks to have for everyday wear. I have since bought the hightop version as well and there are just as equally great. They fit almost like compression socks. Color does fade a bit after repeated washing but not enough to make a big difference in appearance. They have lasted for a long time and still going. They have lots of cushion which makes it very comfortable to wear.
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    Reviewed in the United States on April 4, 2026
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    kimberly jumper
    New York, US
    ★★★★★ 5
    Great Socks
    Color: (001) Black / Black / Castlerock, Size: Large
    I keep ordering these over and over again. They fit well, and are soft and comfortable. My feet don't sweat like crazy while wearing them. The cupped heel makes them fit even better. They hold up to everything from everyday use to active lifestyles.
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