Nissan Xterra 2010 Manual Gasoline Peace, mercy, and blessings of God be upon you. For sale: Catback exhaust, custom-made by Fox. Abdullah, with a 17 outlet, and the invoice is available. Type of customization: Equal length + original electronic Fox muffler + Fتك muffler for smoothing. This combination (Equal length + Fox muffler + smoothing muffler) is excellent for Fتك owners. Its primary goal is to modify and harmonize the exhaust note while maintaining performance. Here's a breakdown of each part's function in this system: Equal Length Connector (after the headers): Its function is to equalize the pressure of gases exiting from both sides. In the Fتك, it is primarily responsible for transforming the engine's sound from "knocking" or randomness into a harmonious and organized tone (making the sound "straightened"). Fox Muffler: It is considered the "beating heart" of the system, providing the known, strong sporty resonance at high acceleration, with excellent gas flow that doesn't choke the engine. Smoothing Muffler: Usually installed at the end of the system or before the Fox muffler to reduce sharpness (whistling) and annoying noise inside the cabin. It ensures a luxurious and quiet sound at low speeds, while the sporty sound emerges when accelerating. The final result of this combination: You will get a very clean sound, free from annoying sputtering, with a clear "groove" at high engine RPMs, which is the currently preferred blend among Fتك (Nissan Patrol) tuning enthusiasts.