Parts Now Pay Later with
Log In Cart
Log In

Create An Account

Log In Cart
Your Cart Is Empty
Free Shipping Over $299.99

Free Shipping Over $299.99

Orders of $299.99 or more ship free within the continental U.S.
Shipping to Alaska and Hawaii is additional and not included.
We do not ship international at this time.

Shipping Policy

Injen 17-21 Civic Si Sedan SES 3" Cat-Back Exhaust System
Part Number: SES1581TT

Images may be for reference only

Injen 17-21 Civic Si Sedan SES 3" Cat-Back Exhaust System
Part Number: SES1581TT

Be the first to review!
Retail: $1054.45
$887.96 & Free Shipping
Save: $166.49 (16%)

Reward Points

It pays to shop with K Series Parts and our reward points program! For every $1.00 you spend you earn reward points.

They are easy to earn, just log in to your account when you check out. If you don't have one it is free and easy to setup.

They are easy to use during check out. Click on the "Have Reward Points?" on the shipping and payment selection page.


Reward Point Program Details

You earn 2 points for every $1.00 that you spend.

100 points equal a $1.00 discount.

Maximum discount per order is 2.5% of the order total.

There is no minimum order total to redeem points.

Points do not apply to shipping or sales tax.

Points are not redeemable for cash.

The point value per dollar, points earned per purchase, and order minimum are subject to change.

Earn 1776 reward points. Learn More


10+ In Stock

Product Details

Part Number: SES1581TT
Brand: Injen Technology
Body Type: Sedan

Injen 3" Stainless Steel Cat-Back Exhaust System with Dual Burnt Titanium Tips for the 217-2021 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

Due to the manufacturer's price control policy, this item may be excluded from promotions and discounts

WARNING: This product may contain chemicals known to the State of California to cause cancer or birth defects. www.P65Warnings.ca.gov.

Vehicle Fitment

Honda Civic
2017 Honda Civic Si Sedan
2018 Honda Civic Si Sedan
2019 Honda Civic Si Sedan
2020 Honda Civic Si Sedan

Reviews ★★★★★ ★★★★★

No Reviews Yet!

Write a Review