S2000 AP1/AP2 CSO Silent Sport Muffler - Used ~800km, Excellent Condition

This is a CSO Silent Sport muffler for the Honda S2000 (AP1/AP2 chassis). The seller used it for about 800 km and reports no dissatisfaction with performance; it's being sold because they want to try a different exhaust, not due to any fault. They describe the sound as excellent - close to an ASM in exhaust note quality - with no resonance or drone. According to the manufacturer's specs quoted by the seller, this is a non-restrictive, output-focused Φ70mm muffler built from SUS (stainless) material chosen for low heat expansion and good sound absorption, with internal silencer design and a down-tail shaped to reduce sound pressure while improving flow velocity. The flange is compatible with setups running anywhere from the stock catalytic converter to a straight 70mm pipe. Production is tracked with a tag from an ISO-certified factory. The seller notes that new-unit lead times are currently long, so buyers wanting a unit sooner may want to consider this used one.

Seller states no notable scratches or dirt (目立った傷や汚れなし) and reports it was used for approximately 800 km with no performance issues.

Shipping: Ships from Ibaraki Prefecture; the page's shipping cost field was truncated/unclear so the carrier and exact fee are not specified in the source text.