HKS [88-91 Honda Civic Si] Legal Exhaust System Cat-Back | LES-H05

The HKS LES (Legal Exhaust System) is engineered to deliver improved exhaust flow and a sportier exhaust note while maintaining emissions compliance. Designed specifically for the 1988–1991 Honda Civic Si, this cat-back system is a direct bolt-on upgrade over the factory exhaust.

Features

• Cat-back exhaust system — replaces everything from the catalytic converter back
• LES (Legal Exhaust System) — designed for emissions compliance
• Improved exhaust flow for increased performance
• Sportier exhaust tone over stock
• Direct bolt-on fitment for specified application
• Stainless steel construction for long-term durability

Fitment

1988–1991 Honda Civic Si

Part Number

LES-H05

Prop 65 Warning

⚠️ WARNING: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.