TFS Ultra 18 Degree 250cc Cylinder Heads (SB Chevrolet)
Take the 18 degree power leap! Ideal for drag and high-rpm circle track racing, Trickflow Ultra 18 250 cylinder heads make serious horsepower right out of the box. In fact, the heads deliver higher airflow numbers than fully prepped 23 degree small block Chevy heads.
These heads feature Trickflow CNC-profiled combustion chambers and CNC Competition Ported runners with a premium high resolution surface finish for maximum flow and performance. The heads accept most current 18 degree intake manifolds, headers, and other components. They require the use of offset shaft-mounted rocker arms and a mechanical roller camshaft with offset intake lifters. Trickflow Ultra 18 cylinder heads are available fully assembled.
DETAILS:
Combustion Chamber:56cc
Intake Runner: 250cc * Exhaust Runner: 100cc
CNC Machined Combustion Chambers
CNC Machined Intake & Exhaust Runners
Raised Intake & Exhaust Port Locations
Angle Spark Plug
Intake Port Shape: Rectangular
Intake Valve Diameter: 2.150"
Exhaust Valve Diameter: 1.600"
Valve Spring Maximum Valve Lift: .700"
NOTES: Requires Jesel or T&D shaft mount rocker arm system, offset .550" for the intake side and .220" for the exhaust side. Will also need special 18 degree intake manifold and custom built racing headers.
PLEASE NOTE: These heads are not catalog items and are built per order. The lead times vary depending on the current schedule and available machine time. Understand that because of the nature and design of these cylinder heads, there will be no guaranteed delivery date. Plan accordingly.
*** SOLD AS PAIRS ONLY ***
PART NUMBER: TFS-3181T001-C01
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