LS Intake Manifold for 1953-1998 GM Cars and Trucks
When outfitting a classic GM car or truck from 1953 to 1998 with an LS powerplant, limited space and extreme exhaust temperatures can hinder flow efficiency. Our Cast Iron Exhaust Manifolds for LS Engines solve these issues with a tight tuck layout and a 2.25 inch exit that reduces backpressure without sacrificing clearance. Crafted from ductile iron blended with silicon and molybdenum, they stand up to repeated heat cycles, and each set arrives with flanges, bolts and OEM style gaskets for a straightforward installation. Ideal for models ranging from Corvette and G-Body coupes to late model Chevy trucks, these manifolds deliver reliable performance across popular swap platforms.
Robust Ductile Iron Structure for Heat Endurance
These exhaust manifolds are crafted from ductile iron enriched with silicon and molybdenum, a combination known for its exceptional strength under sustained heat cycles. The alloy's inherent toughness resists cracking and warping even when exposed to repeated temperature spikes typical in LS swaps. A natural cast finish can be upgraded with a ceramic coating to add resistance to corrosion and surface degradation. This material choice ensures the manifolds retain their shape and sealing integrity over years of street and track use.
Tight Tuck Layout with 2.25 Inch Outlet for Flow Optimization
The compact tight tuck design positions runners close to the block to maximize clearance in cramped engine bays without sacrificing flow capacity. With a 2.25 inch outlet diameter, these manifolds maintain high exhaust velocity, improving scavenging and reducing backpressure. The streamlined path encourages more efficient use of exhaust pulses, which translates into smoother torque delivery across the rpm range. This geometry is particularly beneficial in classic GM chassis where space between frame rails and steering components is limited.
Comprehensive Installation Kit for Straightforward Fitment
Each set arrives complete with both exhaust manifolds plus all required welding flanges, OEM style gaskets, bolts, studs and hardware. This all in one kit eliminates the need to source separate components and reduces the risk of mismatched parts during assembly. Engine builders appreciate the direct fit on models from Corvette to G Body and GM trucks, cutting setup time and ensuring proper sealing. Clear sealing surfaces and bolt patterns match factory dimensions for a worry free installation.
Optimized Converter Efficiency and Up to 500 Horsepower Support
Engineered to support outputs as high as 500 horsepower, these manifolds improve catalytic converter performance by delivering consistent flow and temperature stability. Enhanced exhaust velocity promotes effective catalyst light off, reducing warm up time and improving emissions control. By minimizing backpressure, the design helps the engine breathe more freely, boosting both peak power and low end torque. The result is a more responsive throttle feel and greater reliability in high output LS applications.
Engineered for a precise fit and lasting performance in LS swaps.