EC Big Valve Head with 32mm Intake and 27mm Exhaust 5mm Valves using the Tillotson JT-207 Cylinder Head. 

The Head Comes with 32mm Intake and 27mm Exhaust Valves; 5mm Stems. Precision Multi-Angle Job, Valve Bowl area, cleaned up match to the seats. The valve work is performed on Rotter Seat & Guide Machine for accuracy and precision. Heads are vacuum checked after the valves are installed to ensure your air-fuel mixture and combustion happens in the cylinder. The Heads Milled to ~18cc Combustion Chamber Not ported, call for porting. Springs, Retainers, Rockers, Gaskets, Seals, or valve cover are omitted. 

Head Specs:

Intake: 32mm, 5mm

Exhaust: 27mm, 5mm

Combustion Chamber: 18cc, Non-Hemi

Multi-Angle Valve Job

Compression Ratio Examples(Final Result will vary on Engine Measurements):

Predator Hemi, Flat Top, .035” Deck height,

w/.045” Thick Head Gasket 9.22:1

w/.010” Thin Head Gasket 10.48

Tillotson 212, Flat Top, .000” Deck height,

w/.045” Thick Head Gasket 10.48:1

w/.010” Thin Head Gasket 12.19:1

Tillotson 225, Flat Top, .000” Deck height,

w/.045” Thick Head Gasket 10.87:1

w/.032” EC Copper Head Gasket 11.49:1

EC 228R, Flat Top, .000” Deck height,

w/.045” Thick Head Gasket 11:01:1

w/.032” EC Copper Head Gasket 11.63:1

EC 236R, Flat Top, .000” Deck height,

w/.045” Thick Head Gasket 11:37:1

w/.032” EC Copper Head Gasket 12.01:1