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A stainless steel tubular exhaust header for the 2.5L QR25DE four-cylinder in the 2002-2006 Sentra SE-R and related trims. It replaces the stock cast manifold with individual primaries per cylinder, which cuts the cylinder-to-cylinder interference that the factory log manifold creates. That is the main gain: better exhaust scavenging, especially paired with an intake and cat-back. It is a bolt-on performance part for owners chasing mid-range and top-end breathing, not a comfort upgrade. Fitment is narrow, so confirm your trim and year before buying.
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Lowest price we've seen: $449.99 on Nov 13 at Amazon. Tracked across 1 store since Nov 13.
Buyers rate it highly, with 35 ratings averaging 5 out of 5. Owners report it fits the listed 2.5L Sentra trims and gives a noticeable seat-of-the-pants pull once combined with other breathing mods.
This stainless steel exhaust header replaces the factory exhaust manifold on the Nissan Sentra with the 2.5L 4-cylinder engine. It gives each cylinder its own exhaust pipe, so the cylinders don't interfere with one another and back pressure is reduced.
With less restriction, exhaust leaves the engine more easily. The header can be combined with a high-performance cold air intake and a cat-back exhaust system. Professional installation is recommended.
