Legamax Premium Cat-Back Exhaust

• 2015–2021 Subaru | WRX STI
• 2015–2021 Subaru | WRX

HKS Legamax Premium mufflers offer the performance benefits of a sports muffler with the class and elegance of a premium muffler. The Legamax Premium cat-back for the 2015-2021 Subaru WRX and WRX STI is a full SUS304 stainless steel system that bolts directly to the stock cat pipe. Smooth mandrel bends create obstruction-free flow: 75mm piping splits into dual 60mm sections feeding a pair of premium LM-shape mufflers with dual 90mm polished tips on each side. A 101.6mm silencer plus a silent chamber keeps the tone mature - the performance of 75mm piping without attracting extra attention. The result is improved throttle response, more horsepower and torque, and reduced turbo lag, with a refined exhaust note suited to daily driving.

• Full SUS304 stainless steel construction with high-luster polished finish
• 75mm center piping splitting into dual 60mm sections
• Quad 90mm (3.5 in) polished stainless tips - dual LM-style tips per side
• LM (Legamax Premium) muffler shape with silent chamber for a mature, refined tone
• Close-proximity noise: 83 dB (HKS) vs 82 dB (stock) - barely louder than stock at idle
• Lightweight design - approximately 35 lbs
• Direct bolt-on installation - hangers welded at OEM locations; no modification required
• Includes gaskets and installation hardware
• Made in Japan
• Manufacturer part number: 31021-BF001

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