2025 SBC 350, 400, 327, 302 Summit Racing Cast Iron Cylinder Heads – Chevy Small Block | 152123

2024 Season Sales?Summit Racing SUM-152123: Cylinder Head, Cast Iron, Assembled, 72cc Chamber, 165cc Intake Runner, Chevy, 302, 327, 350, 400, Each – Think you have to scour the local bone yards to find a decent set of GM’s old double hump or fuelie cylinder head castings? Not true. In fact, we’ve brought back classic Chevy performance in a big way with these ready-to-run heads for small block Chevy. Our versions of the popular GM cylinder heads offer great performance for less than it would cost to rebuild an old set of double hump castings. SUM-152123 fits these applications: CHEVROLET 6.6L/400 Chevy small block Gen I, CHEVROLET 5.7L/350 Chevy small block Gen I, CHEVROLET 5.4L/327 Chevy small block Gen I, CHEVROLET 5.0L/302 Chevy small block Gen I.