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The exhaust manifolds found in the 1988-1997 Chevrolet / GMC Pickups and SUVs were designed to combine the exhaust gasses from each of the cylinders quickly with a manifold that was cost effective to produce. Our long tube 4-1 off-road headers are designed to allow the exhaust gasses to flow more freely from each 4 cylinder bank and combine in a more efficient manner. Tubing has been optimized for the 5.0L(305ci) and 5.7L(350ci) engines. This creates a reduction in cylinder backpressure and improved exhaust gas velocity. These improvements free up lost horsepower and torque. An added benefit is a more performance oriented exhaust sound. Package Included: 1 x Exhaust Header Manifold Kit ( Left & Right) Compatible with: 92-94 Chevrolet Blazer 88-95 Chevrolet C1500/ C2500/ C3500/ K1500/ K2500/ K3500 92-95 Chevrolet C1500/ C2500/ K1500/ K2500 Suburban 1988 Chevrolet R30/ V30 1989 Chevrolet R3500/ V3500 1995 Chevrolet Tahoe 88-95 GMC C1500/ C3500/ K1500/ K2500/ K3500 88-97 GMC C2500 92-95 GMC C1500/ C2500/ K1500/ K2500 Suburban 88-89 GMC R3500/ V3500 92-95 GMC Yukon Fit 5.0L/ 5.7L Enignes Models without Air Injection