1.50-Inch Inlet Exhaust Header

The Flashark EH28156 exhaust header is a high-performance upgrade specifically engineered for the 1994-2004 Chevrolet S10 and GMC Sonoma models featuring the 2.2L I4 engine. Constructed from polished 304 stainless steel, this header boasts CNC-machined flanges for a precise fit and includes standard graphite manifold gaskets to ensure a leak-free seal. Designed as a direct bolt-on replacement for the restrictive factory cast-iron manifold, the EH28156 aims to reduce exhaust backpressure and improve overall engine efficiency. Its mandrel-bent tubing and optimized design allow exhaust gases to exit more freely, potentially enhancing performance and providing a more aggressive exhaust note. The header features a 1.50-inch inlet and a 2.50-inch outlet. Installation is described as straightforward for moderately experienced DIYers, with no welding or cutting required for the standard setup. The header includes the necessary upstream O2 sensor bung, allowing the factory ECU to adjust automatically to the improved exhaust flow. While custom tuning is not strictly required for basic installation, it can help maximize gains when paired with other modifications like a full exhaust system and cold air intake. It is important to note that this header is designed exclusively for the factory 2.2L I4 OHV (LN2) engine and is not compatible with newer 2.2L Ecotec engines or V8 swap applications. This part is designated for off-road or track use only and may not be street legal in California or other regions with strict emissions regulations due to alterations in the factory emissions control path.