Injen 17-21 Civic Si Sedan SES 3" Cat-Back Exhaust System
Brand: Injen Technology
Price: $1,294.53 USD
Purchase details
Fitment: Fitment is not yet verified. Confirm your vehicle and relevant modifications before ordering. Review fitment details.
Availability: Ready to ship — Estimated processing: 1–3 business days
Returns: Review return eligibility.
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Fitment
Fitment is not yet verified. Confirm your vehicle and relevant modifications before ordering.
Description
Injen 3" Stainless Steel Cat-Back Exhaust System with Dual Burnt Titanium Tips for the 2017-2021 Honda Civic Si Direct fit for 2017-2021 Honda Civic Si L4-1.5L Turbo (Sedan Only) Does not fit Coupe and Hatchback models Dyno Proven gains of up to 11 hp and 10 lb-ft. of torque Stainless Steel Investment Cast Flanges For a Fast and Easy Install Hand Crafted and Tig Welded to Perfection for Strength and Durability Unique Design Increases Exhaust Velocity (Depending on the Application) 304 SS Mandrel-Bent Tubing Dual 4.0" Titanium Tips Premium Stainless Steel Hardware and Hangers (Depending on the Application) Designed and Made in Pomona, CA
Why it belongs in your build
The right exhaust component balances flow, sound, fitment, and emissions requirements for the exact chassis rather than chasing a one-size-fits-all setup.
Key details
Brand: Injen Technology
Manufacturer part number: SES1581TT
Product type: Cat Back Exhausts
Before you order
Confirm chassis, engine, transmission, connection points, and emissions legality. Some applications require professional installation or are intended only for competition use.
Specifications
General
| Manufacturer part number | SES1581TT |
|---|