APEXi N1 Dual Muffler 1995-1998 Nissan 240SX (S14)The N1 Dual is a hybrid variation of the N1 exhaust. This system incorporates a twin pipe, twin canister design for improved mid range torque without sacrificing top end power. The twin piping is constructed of full SUS 304 polished stainless steel piping and canisters. Each canister features a polished 90mm (3. 54 inch) tip. Robotic TIG welds compliment the hand crafted MIG welds to create on of the most innovative and dynamic exhaust systems on the