The HKS Silent Hi-Power is a 75mm SUS304 stainless steel cat-back exhaust for the Nissan Silvia S15 (SR20DET turbo, 1999-2002); the internal TYPE-S silent chamber keeps close-measurement sound at 93 dB and the system exits through a single 120mm SUS304 tip with 90mm road clearance.
| Type | Cat-back exhaust system (Silent Hi-Power) |
| Material | SUS304 stainless steel |
| Pipe Diameter | 75mm |
| Tips | Single 120mm — SUS304 stainless steel |
| Sound Level | 93 dB (close, HKS); 89 dB stock |
| Road Clearance | 90mm (stock suspension) |
| Part Number | 31019-AN017 |
Shipping: In-stock orders placed before 3 PM EST ship the same day, and everything else ships within 24 hours. Standard, expedited, and overnight options are available at checkout. Backordered items ship as soon as we get them back in stock. Contact us for lead times. See the full Shipping Policy.
Returns: 30-day returns on new, unused items in original packaging. See the full Refund Policy.
