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All A'pexi exhaust systems are considered "direct replacement" parts because they neither relocate nor modify the required factory emission control devices; therefore they comply with applicable emission laws. They don't require a CARB Executive Order (EO), by virtue of their not being "add on" or "modified" parts. A'pexi exhaust systems are also "functionally identical" to the OEM parts, during emission tests. To ensure compliance with the 95dB limit, A'pexi tests sound levels on stock vehicles before the product release.
The A'pexi n1 Muffler series has evolved/ The N1 ExTi (Expert Titanium) offers all of the quality and performance of Apex's race proven N1 Exhaust systems and also incorporates an ultra light weight titanium muffler section. For years, only A'pexi customers in Japan could obtain the N1 Titan; now however, at A'pexiUSA, the company is very pleased to be able to offer this muffler under the N1 ExTi name to the U.S. tuning market.
The N1 ExTi utilizes an immaculately constructed Titanium N1 Muffler with full stainless steel piping mated to it. The muffler section discharges through an adjustable length 115mm super heated (burnt) titanium tip and features a full titanium canister. The design of the five step adjustment range of the finisher tip allow users with aero kits the ability to extend or retract the tip in accordance with the dimensions of the rear bumper. The N1 ExTi successfully blending form with function, stands as a true lightweight version of the N1 exhaust. The A'pexi N1 series muffler is now a standard component of the import tuning industry. The N1 was the first of its kind to incorporate the classic angled muffler design which has thereby, once again, became familiar with street cars today. Arising from A'pexi' involvement in the grueling N1 endurance series, the N1 exhaust system pairs free flowing, mandrel bent piping (60.5mm N/A, 80mm for turbo applications) with a straight through design racing muffler. This combination resulted in dyno proven horsepower. A'pexi designed it with track use in mind, and with durability as having the utmost importance. The polished SUS 304 stainless steel canister features robotic TIG welding and yields years of reliable performance and an immaculate finish. A'pexi treats the mild steel piping with a special high temperature titanium particle coating. The A'pexiN1 muffler is truly the benchmark which competitors strive to emulate.