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

HKS 17-21 Civic Hatchback Sport Legamax Premium Catback Exhaust
Part Number: 31021-AH004

HKS 17-21 Civic Hatchback Sport Legamax Premium Catback Exhaust-A1
HKS 17-21 Civic Hatchback Sport Legamax Premium Catback Exhaust-A2
HKS 17-21 Civic Hatchback Sport Legamax Premium Catback Exhaust-A3
Images may be for reference only

HKS 17-21 Civic Hatchback Sport Legamax Premium Catback Exhaust
Part Number: 31021-AH004

Be the first to review!
Was: $1610.00
$1,368.50 & Free Shipping
Save: $241.50 (15%)

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 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 2737 reward points. Learn More


10+ In Stock

Product Details

Part Number: 31021-AH004
Brand: HKS

The HKS Legamax Premium exhaust for the 2016-2021 Honda Civic Coupe with 1.5L engine. 
  • Shape of muffler: Ti (Dual) LEGAMAX Premium
  • Main material: SUS304
  • Diameter of tip: 75
  • Diameter of center pipe: 60
  • Close noise level: Stock 84 / HKS 91
  • About road clearance: Clearance: 140mm
  • Mid Pipe Silencer


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 Sport Hatchback 2018 Honda Civic Sport Hatchback 2019 Honda Civic Sport Hatchback 2020 Honda Civic Sport Hatchback 2021 Honda Civic Sport Hatchback

Reviews ★★★★★ ★★★★★

No Reviews Yet!

Write a Review