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 Sep 25 - Sep 30

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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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    4.9 ★★★★★
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    Kaneisha Johnson
    Grantham, US
    ★★★★★ 5
    Great Quality
    Size: Large, Color: Light Blue
    Very nice
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on April 1, 2026
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    Amber A
    Dallas, US
    ★★★★★ 3
    Nice shirt, odd fit
    Size: X-Large, Color: Dark Grey, Size: X-Large, Color: Dark Grey
    This shirt looks and feels very nice, and there's no weird stitching or loose threads, but the fit was a little off. It was a little short on my husband who is 6'1", but if he stands with his hands down it doesn't really LOOK too short. It's when he raises his arms for anything that it seems weirdly tight across his the chest and it pulls the hem of the shirt up quite a lot. This could just be a body type thing, but he doesn't have that issue in other shirts the same size and style. It's a shame because the shirt itself seems really nice.
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    Reviewed in the United States on February 7, 2026
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    Verified Purchase
    Patrina Richey
    Boise, US
    ★★★★★ 5
    Perfect
    Size: Medium, Color: Black
    Perfect fit, great material
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on March 12, 2026
    W
    Verified Purchase
    William Tran
    West Palm Beach, US
    ★★★★★ 5
    True oxford, comfortable, good fit, iron
    Size: Large, Color: Light Grey
    Great clean-cut, casual shirt. Material is thick as you should expect for a true oxford shirt, even with the stretch/elastane. Good fit, sleeves arent overly long. You’ll probably need to iron it. Overall very happy with purchase.
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    Reviewed in the United States on March 27, 2026
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    The VanHofwegens
    Massapequa, US
    ★★★★★ 5
    Amazon Essentials competes well with other store brands
    Very Nice and comfortable shirt, on the thicker side and is slightly blue, baby blue perfect in fall winter might be a little thick for summer. the buttons and stitching all seem well done for the price. The size was true and fit great, the big tall size worked great, the shirt does not seem to wrinkle easily since it is thicker
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    Reviewed in the United States on November 25, 2025

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