Parts & Accessories Spare parts Full headers for a 4-cylinder Altima, from the exhaust manifold to the end. Head: 2 inches, Pipes: 2.5 inches (Moniz). Previously custom-made by Al-Safadi. - The headers install using the original engine bolts, from the engine to the rear mufflers, without any tuning. - Original Borla mufflers: one after the engine and two at the rear. - A pipe is available instead of the first muffler for those who want it, included with the sale. - The sound is very distinctive without being loud and is suitable for all ages. Even patrols won't bother you, based on experience and many trips. - Regarding torque, without any programming, the car's response improves 180 degrees in acceleration, initial pull, and noticeable activity from zero and at all speeds. No dashboard lights will turn on. - Regarding fuel consumption, there's no significant difference, neither for better nor for worse, unless you floor it. Flooring it with these headers consumes more fuel than flooring it with the stock exhaust, which is normal for headers. - The complete exhaust system is guaranteed: no leaks or air drafts. Install and drive. - Fits all 4-cylinder Altima models from 2008 to 2018. Videos showing the sound are available upon request for serious buyers. ((((((((Offers less than 1500 will not be considered))))))))