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Injen 17-20 Honda Civic Si 1.5L Turbo (Sedan Only) 3in Cat-Back Stainless Steel Exhaust Injen INJSES1581TT
Injen 17-20 Honda Civic Si 1.5L Turbo (Sedan Only) 3in Cat-Back Stainless Steel Exhaust Injen INJSES1581TT
Injen 17-20 Honda Civic Si 1.5L Turbo (Sedan Only) 3in Cat-Back Stainless Steel Exhaust Injen INJSES1581TT
Injen 17-20 Honda Civic Si 1.5L Turbo (Sedan Only) 3in Cat-Back Stainless Steel Exhaust Injen INJSES1581TT
Injen 17-20 Honda Civic Si 1.5L Turbo (Sedan Only) 3in Cat-Back Stainless Steel Exhaust Injen INJSES1581TT
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Injen 17-20 Honda Civic Si 1.5L Turbo (Sedan Only) 3in Cat-Back Stainless Steel Exhaust

Injen
INJSES1581TT
843115027230
Catback
3 Units In Stock - Ships Next Business Day
$ 1,239.85 $ 1,109.34
FREE Ground Shipping!
$ 1,109.34

SKU: SES1581TT | UPC: 843115027230

Injen 17-20 Honda Civic Si 1.5L Turbo (Sedan Only) 3in Cat-Back Stainless Steel Exhaust

This Injen cat-back exhaust system replaces the factory exhaust from the catalytic converter back on 2017-2020 Honda Civic Si Sedan models with 1.5L turbo engines. Mandrel-bent tubing ensures consistent diameter for smooth exhaust flow and noticeable power increases. Expect a deep aggressive exhaust note that enhances the driving experience while maintaining easy bolt-on installation.

Key Features

  • Mandrel-Bent T304 Stainless Steel Tubing: Provides smooth unrestricted airflow throughout the 3-inch diameter for improved exhaust scavenging and horsepower gains.
  • 100% TIG Welded Construction: Handcrafted in Pomona California USA for durability and precision joints that resist corrosion and fatigue.
  • Investment Cast Flanges and Custom Hangers: Ensures perfect alignment and secure mounting with all necessary hardware included for direct fitment.
  • Aggressive Sound Profile: Delivers a deep throaty tone under acceleration without excessive drone on highway drives.
  • Complete Bolt-On Design: Includes mufflers mid-pipe resonators and clamps for hassle-free installation in under 2 hours.

Product Notes

  • Fits sedan models only confirm your Civic Si is a 4-door sedan before purchase.
  • Clean with mild soap and stainless steel polish to maintain finish over time.
  • Securely packaged to prevent damage during transit.

Installation Notes

  • Professional installation recommended.
  • Bolt-on design uses factory mounting points no cutting or welding required.
  • Includes all stainless steel clamps bolts and hangers for complete hardware kit.

This Part Fits

Year Make Model Submodel
2017-2020 Honda Civic Si Sedan

Why Choose Injen?

  • Decades of exhaust engineering experience across cars trucks and powersports.
  • All systems built with premium materials for long-lasting performance.
  • Designed tested and manufactured entirely in the USA for quality control.

Frequently Asked Questions

  • Q: Does this exhaust fit 2017-2020 Honda Civic Si hatchback models?
    A: No this SES1581TT system fits sedan models only due to unique rear suspension and bumper differences.
  • Q: What material is used in this exhaust system?
    A: Constructed from heavy-duty T304 stainless steel tubing with mandrel bends and TIG welds for corrosion resistance and strength.
  • Q: What warranty covers this product?
    A: Injen provides a lifetime structural warranty and 5-year finish warranty against manufacturing defects when installed properly.

Shipping & Handling

  • Method: Standard ground shipping
  • Availability: In stock - ships same or next business day
  • Packaging: Securely boxed dimensions 48 x 14 x 14 inches
  • Weight: 28 lbs
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