APEXi N1 ExTi (Expert Titanium) Catback Exhaust System is tailor-made for high horsepower backed engines that require quick throttle response. An improved version of the original N1 system, this catback exhaust system is only recently made available in the US. In Japan, it was known as N1 Titan.

APEXi N1 ExTi (Expert Titanium) Catback Exhaust System features full stainless steel piping attached to an exceptionally built full lightweight titanium muffler section, an extendable or retractable 115mm heat-treated exhaust tip, and 5 levels of length adjustments that are specifically designed to fulfill the special needs of car enthusiasts who prefer aero kits in their vehicles.

APEXi N1 ExTi (Expert Titanium) Catback Exhaust System is the result of persistent and relentless efforts of the engineers at APEXi. Special emphasis was laid on the material used, welding quality, CAD designing, engine compatibility, exhaust gas dynamics, and the actual performance of the system in live conditions. Emission standards are met, while APEXi exhaust system retains the original factory mounts and hardware. No CARB Executive Order is required because these are considered as "direct replacement parts".

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