{"product_id":"hks-hi-power-muffler-catback-single-wrx-sti-2015-2021","title":"HKS Hi-Power Muffler Catback Single WRX (STI) 2015 - 2021","description":"\u003cp\u003e\u003cstrong\u003e31006-BF003\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAggressive looks and sound, combined with low back pressure for greater tuning potential.\u003cbr\u003e\u003cbr\u003eFeatures:\u003cbr\u003e- Striking Presence - Featuring an 85mm pipe and a bullet-style muffler with a single right-side exit, it delivers an overwhelming presence and a distinctly race-inspired look.\u003cbr\u003e- Volume control for every driving scene - The inner silencer can be attached or removed to control both volume and tone. Keep it moderate for city driving, or remove it for a more aggressive, sporty sound for the track.\u003cbr\u003e- Adjustable tail tip - The adjustable tail tip allows you to adjust how far the tail extends, letting you achieve your ideal, personalized style.\u003cbr\u003e\u003cbr\u003eSpecifications:\u003cbr\u003e- Shape of muffler: HP (Titan) (Hi-Power Muffler)\u003cbr\u003e- Main material: S4, S3\u003cbr\u003e- Diameter of tip: 119mm\u003cbr\u003e- Diameter of center pipe: 74.7 \u0026gt; 85.0\u003cbr\u003e- Close noise level: HKS 96dB *Note: Proximity exhaust noise measured according to California standards. Sound level recorded at 75% of maximum engine RPM.\u003cbr\u003e- About road clearance(*2): Clearance: 115mm \u0026gt; Portion of the kit: Mid-pipe\u003cbr\u003e- Product Weight: 18.4kg\u003cbr\u003e\u003cbr\u003ePerformance - Reduced Exhaust Back Pressure\u003cbr\u003e- Featuring dramatically lower exhaust back pressure than the stock system, it improves exhaust flow for sharper throttle response and allows the engine to deliver its full performance potential.\u003cbr\u003eSound Pressure - Enjoy Sound Adapted to the Scene\u003cbr\u003e- With the inner silencer installed, this exhaust delivers a subdued sporty tone. Removing it transforms the sound into a powerful, racing-inspired roar.\u003cbr\u003eTail Tip Adjustment - Adjustable Tail Tip\u003cbr\u003e- The tail tip features a sliding adjustment mechanism, allowing you to customize the protrusion to your preference and enjoy a personalized look.\u003cbr\u003eLayout Comparison - Aggressive Presence with Exceptionally Low Back Pressure\u003cbr\u003e- By increasing the pipe diameter from the factory 60 mm to 85 mm, the system delivers a bold and commanding appearance. In addition, the straight-through silencer design eliminates internal restrictions, significantly reducing exhaust back pressure. The result is a noticeable improvement in driving performance and responsiveness.\u003cbr\u003eSignificant Weight Reduction\u003cbr\u003e- Switching from a quad-exit to a single-exit and removing the mid-silencer results in a significant weight reduction, enhancing overall driving performance.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HKS","offers":[{"title":"Default Title","offer_id":67768218615875,"sku":"31006-BF003","price":1604.61,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0278\/0456\/5571\/files\/large_31006_BF_003_5_80cd5b914a.png?v=1792768657","url":"https:\/\/gumotorsport.com\/en-us\/products\/hks-hi-power-muffler-catback-single-wrx-sti-2015-2021","provider":"GUMOTORSPORT","version":"1.0","type":"link"}