Stock manifolds choke a small block and headers do not always fit the car. These sit in between: a cast manifold with the compact routing and quiet running of the factory part, but a 1-5/8 in. cross section and a 2-1/2 in. outlet so the engine can actually breathe, cast in high silicon-molybdenum ductile iron so they resist the cracking that kills stock manifolds.

Hooker 8525-1HKR Cast Iron Exhaust Manifold Features:

• Fits 262-400 Small Block Chevy V8 engines with rectangular port heads and straight spark plugs.
• Larger than stock 1-5/8 in. port cross section with a 2-1/2 in. outlet.
• Cast from high silicon-molybdenum ductile iron for high temperature strength and crack resistance.
• Pre-welded standard 2-bolt outlet flanges.
• Silver ceramic coated finish.
• Compact design suits a wide range of replacement and engine swap applications.
• Manifold flange and collector hardware with gaskets included.
• Modifications are required for installation and these will not fit first generation Camaro or Firebird.
• Sold as a pair.