Hooker BlackHeart Cast Iron Exhaust Manifold - 2-1/2 in Outlet - GM LS-Series - Black Ceramic Coated (Pair) Headset and Radio Kits 1960-1965 GMC 2500 Series

1960-1965 GMC 2500 Series

Helps to calculate true compression ratio

18-1/2 in Spline Length

Cylinder head porting

WB2 - Kit (includes 2 x 4

Hooker BlackHeart Cast Iron Exhaust Manifold - 2-1/2 in Outlet - GM LS-Series - Black Ceramic Coated (Pair) Headset and Radio Kits 1960-1965 GMC 2500 SeriesFor applications or projects where our standard LS swap manifolds (8501HKR, 8502HKR, 8503HKR series) don't quite fit and our "center dump" manifold (8504HKR) exits too far forward, our new rear dump and rear dump SBC exit cast iron swap manifolds have arrived. These differ in that they exit in a straight down fashion much like a block hugger header but exit more toward the rear of the engine than our "center dump" manifolds. While almost the same as