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This is a stainless steel exhaust header for the 2.5L four-cylinder Nissan Sentra (SE-R, SE-R Spec V, S and Limited Edition, roughly 2002-2006). It replaces the stock cast manifold with individual runners per cylinder, which cuts the back-pressure and cylinder-to-cylinder interference that the factory manifold creates. It is a bolt-on performance part aimed at owners chasing more top-end flow, ideally paired with a cold air intake and cat-back exhaust. It is a niche upgrade, not a repair part, and the 180-day warranty is short compared with branded headers.
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Buyers rate it highly, with 35 ratings averaging 5 out of 5. Feedback centers on fitment on the 2.5L Sentra and a noticeable change in exhaust note and pull.
This stainless steel exhaust header replaces the factory exhaust manifold on the engine listed in the product name. It gives each cylinder its own exhaust pipe, so the cylinders don't interfere with one another. This reduces the back pressure found in common exhaust manifolds.
With less back pressure, the engine can send more power to the wheels. A header can be combined with a high performance cold air intake and a cat-back exhaust system to remove restrictions from the engine. Professional installation is recommended.
