Skip to product information
1 of 8

APEXi N1-X Evolution Extreme Catback Exhaust - 2022+ Honda Civic Si [FE1] / 2023+ Acura Integra [DE4]

APEXi N1-X Evolution Extreme Catback Exhaust - 2022+ Honda Civic Si [FE1] / 2023+ Acura Integra [DE4]

Regular price $139,900.00
Regular price Sale price $139,900.00
Sale Sold out

Out of stock

Quantity

Need this part?

This item is currently unavailable. Ask us about availability or help finding a suitable replacement.

Ask about availability or fitment

Year, make, model and engine help us check fitment.

We'll reply to your inquiry by email. This is not an automatic restock alert.

Shipping & returns

This selection is unavailable. Ask us to confirm availability and timing.

Shipping details

In-stock orders are processed within 48 hours; transit time is additional.

International orders include export processing and customs clearance. Duties, taxes and brokerage are extra; final freight charges may change after remeasurement.

Read the shipping policy

Returns

Need to return an item? Request authorization within 30 days of delivery for eligible unused, uninstalled items. Exclusions and fees apply.

Wrong part/size or change of mind: a 20% return processing fee applies, plus applicable shipping costs.

Read the full return policy
Eligibility, fees and return steps

Request return authorization (RMA) within 30 days of delivery for eligible items. Keep items unused and uninstalled, with original packaging and accessories. Electronics, liquids, special orders and other categories are excluded.

Email sales@frsport.com with RETURN and your order number in the subject to request an RMA. Do not send a return without authorization.

Original shipping is non-refundable. For orders shipped free, the actual outbound shipping cost is deducted from the refund. Return shipping is prepaid by the customer.

After payment capture, cancellations and refunds generally incur a 5% processing fee, except for our error, confirmed defects or confirmed carrier loss. The 5% and 20% fees do not stack; only the greater applicable fee applies. Store credit waives the 5% fee, but applicable return fees remain.

Missing, incorrect or transit-damaged items: report within 3 business days of receipt with photos of the product and packaging.

For defective items, contact us for help with the manufacturer's warranty process. The manufacturer decides the claim.

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-X 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
  • Comfort with optimal performance gains

* Does Not Fit : Honda Civic Hatchback Models (2022+)

Bolt-On Yes
Part Number 164KH003
Year 2022+, 2023+
Make Honda, Acura
Model
  • Civic Si Sedan FE1
  • Integra Sedan DE4
  • Civic Touring Sedan (1.5L Turbocharged)
    ** ONLY compatible with factory OE Honda rear diffuser trim garnish PN: 71541-T20-A50 (Right), 71591-T20-A50 (Left) **
  • Civic Sedan EX (1.5L Turbocharged)
    ** ONLY compatible with factory OE Honda rear diffuser trim garnish PN: 71541-T20-A50 (Right), 71591-T20-A50 (Left) **
Body Style
  • FE1 - 4 Door Sedan
  • DE4 - 4 Door Sedan
Engine L15BA (Turbo)
Chassis
  • FE - 4 Door Sedan
  • DE4 - 4 Door Sedan
Exhaust Type N1 Evolution Extreme Muffler (N1-X)
Piping Diameter 3inch to 2.5inch
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
WARNING: California Prop 65
Cancer & Reproductive Harm
www.p65warnings.ca.gov


View full details

Vehicle fitment