HKS Hi-Power SPEC-L II Muffler – Subaru WRX STI (VAB, 2014–2020)
Elevate your EJ20-powered WRX STI with a lightweight, stainless-steel cat-back engineered for flow, response, and a clean, assertive exhaust note. JASMA-certified for quality and compliance.
Key Features
- Precision fitment for VAB WRX STI (2014–2020, EJ20 turbo).
- SUS304 stainless-steel construction for durability and corrosion resistance.
- Hi-Power SPEC-L II layout for improved flow and sporty tone.
- Dual tip design with optimized 65–50 mm center pipes to reduce backpressure.
- Sporty acoustics (approx. 89 dB vs. ~78 dB stock, measured at idle) with refined character and minimal drone.
- Lightweight system (~10.4 kg) for notable weight reduction vs. stock.
- Maintains practical ground clearance (~125 mm) to help avoid scraping.
- JASMA certification (JQR30144245) for peace of mind.
What’s Included
- Main muffler assembly
- Center pipe(s)
- Gaskets, hardware, and fittings (as supplied by HKS)
Specifications
| Product Code | 31019-AF130 |
| Vehicle | Subaru WRX STI (VAB) 08/2014–04/2020 |
| Material | SUS304 Stainless Steel |
| Exhaust Type | Hi-Power SPEC-L II (dual exit) |
| Center Pipe | Approx. 65–50 mm × 2 |
| Tip Diameter | Approx. 94 mm (L/R) |
| Noise (Idle) | Stock ~78 dB → HKS ~89 dB |
| Ground Clearance | Approx. 125 mm (comparable to stock) |
| Weight | ~10.4 kg (significant reduction vs. stock) |
| Certification | JASMA JQR30144245 |
Notes
- Designed for EJ20 turbo models. Check local regulations and compatibility before purchase.
- Professional installation recommended. Torque fasteners to manufacturer specifications.
What clients say
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Really fast and high quality customer support, my order got to me faster than the quoted time too. No complaints
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The team took a mostly broken car after some work done elsewhere, and have systematically made it reliable and fast for a fair price. The staff are invested in the work they do which also makes a big difference.
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Jeff was extremely helpful in assisting me with my exhaust. Always kept me updated and answered any queries in a timely manner. Will definitely be coming back for my future mods
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Justin and his crew is amazing! Always ready to help and service with a smile. Trusty, friendly and reliable! Had my car sent in for repair twice and it’s fixed on time, at a reasonable price and with no issues. Highly recommended!
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Easy to deal with and part was ordered quickly
