HKS 02-07 WRX / 04-07 STi Sport Exhaust - 31013-BF001

What Owners Say

Owners and enthusiasts consistently praise the HKS exhaust for delivering excellent value at its price point, with many highlighting its quality construction and well-engineered sound profile. The straight-through design offers noticeable performance gains, particularly when paired with a front pipe, while fitment is described as precise and professional. Sound character tends to be more refined than expected—drivers appreciate the balance between sporty tone and livability, noting it's audible inside the cabin but not overwhelmingly loud for daily driving. Some buyers initially anticipated a more aggressive volume but ultimately find the moderate exhaust note satisfying. The HKS has earned its reputation as one of the better options in its category, combining performance, quality, and reasonable pricing.