Product images and videos are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Exhaust› Exhaust Pipes, Systems and Components
HKS
HKS 02-07 WRX / 04-07 STi Hiper Exhaust
SKU: H005 3106-EX008
Moderate — 2–4 hours
Overview
Crafted from durable 304 stainless steel with a corrosion-resistant black coating, the system features 75mm (3-inch) piping and a 120mm tip for optimal flow. Its design minimizes bends, creating a straighter exhaust path that contributes to increased RPM power gains. The system includes all necessary gaskets and hardware for installation. Note that it does not clear vehicles equipped with the optional Subaru rear differential skid plate.
Show original supplier description
Part #: 3106-EX008
Vehicle Symptoms
- Excessive exhaust noise and drone
- Loss of low-end torque
- Poor throttle response
- Exhaust smells rich or fuel odor
- Rust or corrosion on stock exhaust
Relevant Conversations
- HKS Hi-Power exhaust WRX review
- Best cat-back exhaust for 2004 STI
- WRX exhaust drone fix
- HKS exhaust vs Invidia N1
- Will HKS exhaust pass emissions?
- Subaru WRX exhaust install time
- HKS 3106-EX008 sound clip
- Cat-back exhaust for turbo lag
- 2005 WRX exhaust upgrade
- HKS Hi-Power vs HKS Carbon Ti
Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Fitment
Fitment Guaranteed
Don’t gamble
on fit.
Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | HKS |
| Part Number | H005 3106-EX008 |
Videos
MAKING THE WRX LOUD! (HKS HI-POWER EXHAUST INSTALL!)
![HKS Carbon-Ti Exhaust [Install & Rev Sounds // WRX Build]](https://img.youtube.com/vi/y13nLF6mLP8/hqdefault.jpg)
HKS Carbon-Ti Exhaust [Install & Rev Sounds // WRX Build]
HKS Hi-Power Exhaust System Sound Test
HKS Hi-Power Exhaust System Installation Guide
2006 Subaru WRX STi HKS Hi-Power Exhaust
HKS Silent Hi Power on Subaru Impreza WRX Bugeye GDA
Impreza WRX STI w/ HKS Hi Power Exhaust - Hard Acceleration!
HKS Hi-Power Exhaust Subaru WRX Revs
2007 WRX STi with HKS TBE
2006 Subaru WRX STi HKS Hi-Power Catback Exhaust Idle & Baby Revs
Subaru WRX STi HKS Catless Downpipe & HKS Hi-Power Catback Exhaust
Subaru Impreza WRX Sound exhaust HKS Silent Hi-Power
About MOTORMIA
Buy with Confidence
Returns & Fitment
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
View Full Return PolicyShipping
Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.
Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.
View Full Shipping Policy