HKS 31019-AN017 Silent Hi-Power Exhaust for 1999-2002 Nissan Silvia S15 (SR20DET

Vehicle Fitment

• 1999-2002 Nissan Silvia S15 (GF-S15, SR20DET / 2.0L turbo I4)
• 1995-1998 Nissan 240SX / Silvia S14 (SR20DET) - when chassis and exhaust mounting match 31019-AN017 setup

Features

• Straight-through "Silent Hi-Power" muffler design offering improved exhaust flow with reduced cabin drone
• Full SUS304 stainless-steel muffler and tail-pipe for corrosion resistance and long-term durability
• 75 mm center-pipe (main section) for less back-pressure and better turbo exhaust scavenging
• Large 120 mm exhaust tip for aggressive sporty appearance and enhanced exhaust tone
• Built-in "silent chamber" attenuates low-frequency sound - smoother idle and cruising noise compared to typical race mufflers
• Direct bolt-on exhaust system - designed to replace stock rear/exhaust without major chassis modification on compatible models
• Balanced between performance, flow gains, and daily-driving comfort - suitable for turbo SR20DET tuned or stock builds
• "Type-S" muffler variant - optimized for a more refined noise signature while preserving performance-oriented flow

Specifications

• Part number: 31019-AN017
• Muffler type: Silent Hi-Power (HP Type-S) cat-back / axle-back exhaust system
• Main pipe diameter: 75 mm
• Tail-pipe / tip diameter: 120 mm
• Muffler / piping material: SUS304 stainless steel muffler & tip; coated piping (as per HKS spec)
• Close (idle) exhaust noise: 93 dB (stock ~89 dB) - per official HKS spec for S15 application :contentReference[oaicite:3]{index=3}
• Minimum road clearance (stock suspension): ≈ 90 mm (may vary with suspension changes) :contentReference[oaicite:4]{index=4}

Included Components

• 1x Rear / muffler section ("Silent Hi-Power" muffler + tail-pipe)
• 1x Center-pipe section (main 75 mm section) compatible with stock mid-pipe / down-pipe
• 1x Exhaust tip (120 mm)
• Mounting hardware & gaskets / flanges required for bolt-on installation (as per HKS kit contents)

Product Description

The HKS 31019-AN017 Silent Hi-Power Exhaust is engineered for SR20DET-powered Nissan Silvia S15 (1999-2002) - and, where compatible, S14 (1995-1998) chassis - offering enthusiasts a balanced upgrade that enhances exhaust flow, turbo response and overall performance without the harshness commonly associated with "race-only" exhaust systems. Its straight-through design, large 75 mm center-pipe, and stainless steel build allow for more efficient exhaust gas evacuation and better turbo spool characteristics, while the built-in "silent chamber" muffler ensures that idle and cruising noise remain manageable for daily driving.

With a 120 mm polished tip and polished SUS304 finish, the 31019-AN017 adds a sporty aesthetic and aggressive sound character under throttle - yet remains refined enough for street use. Installation is designed to be bolt-on, reusing the original exhaust flange and mounting points (where chassis and suspension geometry match). This makes it a practical choice for tuned SR20DET builds - whether you aim for improved mid-range boost response, freer high-RPM flow, or simply a more performance-oriented exhaust note with acceptable NVH for everyday driving.