SBF 180cc Alum Cyl Head 58cc 1.94/1.55 Assembled

The SBF 180cc Aluminum Cylinder Head with 58cc chambers and 1.94/1.55 valve sizes is purpose-built for Small Block Ford engine builders seeking measurable gains in flow characteristics and combustion efficiency. This fully assembled FLOTEK head delivers the precision engineering required for serious performance applications, from street-strip builds to competition engines. Whether you're upgrading a 289, 302, 351W, or similar SBF platform, this cylinder head addresses the factory flow restrictions that limit mid-range power and peak horsepower potential.

At 26.13 lbs and featuring aluminum construction, this head reduces reciprocating mass while the 180cc port volumes and 58cc combustion chamber geometry work together to improve mixture motion and burn rate. The 1.94-inch intake and 1.55-inch exhaust valves are sized to optimize the flow-to-lift ratio across the RPM band, critical for natural-aspiration tuning where every cubic centimeter of intake charge matters. The fully assembled design means springs, keepers, seats, and guides are pre-installed to factory specifications, eliminating assembly variables and ensuring bolt-on readiness for your engine build.

This head pairs best with engine packages running compression ratios between 9.5:1 and 11:1, where the 58cc chamber volume provides reliable detonation margins without sacrificing performance. Ideal for builders upgrading older OEM heads or those standardizing component quality across a fleet, it bolts directly to any standard SBF block with 4.080-inch bore spacing. Dyno results from similar platforms show typical gains of 15–25 hp and 10–18 lb-ft torque versus stock iron heads, with benefits most pronounced between 3,500 and 6,500 RPM where port velocity peaks.