Instruction Sheets for Part Number TFS-5261B661-C04
Trick Flow® Twisted Wedge® 11R 227 Cylinder Heads for Small Block Ford TFS-5261B661-C04
Part Number: TFS-5261B661-C04
Trick Flow® Twisted Wedge® 11R 227 Cylinder Heads for Small Block Ford
Cylinder Head, Twisted Wedge® 11R 227, Bare, 66cc CNC Chambers, Aluminum, Small Ford, 289, 302, 351W, Each
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Estimated Ship Date: Apr 7, 2026
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Overview
Brand:
Manufacturer's Part Number:
TFS-5261B661-C04
Part Type:
Product Line:
Summit Racing Part Number:
TFS-5261B661-C04
UPC:
842645122637
Combustion Chamber Volume (cc):
66
Intake Runner Volume (cc):
227cc
Exhaust Runner Volume (cc):
66cc
Cylinder Head Style:
Bare
Cylinder Head Material:
Cast aluminum
Intake Port Shape:
Rectangular
Intake Valve Diameter (in.):
2.080 in.
CNC-Machined Combustion Chamber:
Yes
CNC-Machined Intake Runner:
Yes
CNC-Machined Exhaust Runner:
Yes
Combustion Chamber Style:
Twisted Wedge®
Intake Port Location:
Standard
Exhaust Port Shape:
Square
Exhaust Port Location:
Standard
Intake Valves Included:
No
Exhaust Valves Included:
No
Exhaust Valve Diameter (in.):
1.600 in.
Valve Springs Included:
No
Damper Spring Included:
No
Retainers Included:
No
Locks Included:
No
Valve Stem Seals Included:
No
Rocker Arm Studs Included:
No
Rocker Arms Included:
No
Rocker Arm Nuts Included:
No
Guideplates Included:
No
Accessory Bolt Holes Drilled:
Yes
Intake Valve Angle:
11
Exhaust Valve Angle:
13
Valve Guides Included:
Yes
Valve Guide Material:
Bronze
Valve Seats Machined:
Yes
Valve Seat Machine Style:
3-angle
Valve Seat Material:
Ductile iron
Cylinder Head Color:
Natural
Steam Holes Drilled:
No
Oiling Style:
Through pushrod
Machined for O-Ring:
No
Heat Crossover:
No
Remanufactured:
No
Quantity:
Sold individually.
Notes:
Competition ported fully CNC machined, non-emissions heads. Trick Flow twisted Wedge 11R heads are machined for 1/2 in. head bolts; for customers with blocks that are machined for 7/16 in. head bolts, the use of TFS-51400419 head bolt bushings is required.
Trick Flow® Twisted Wedge® 11R 227 Cylinder Heads for Small Block Ford
Twisted Wedge® 11R 227 cylinder heads represent Trick Flow's ultimate development of the Twisted Wedge® innovation, featuring Trick Flow's most efficient combustion chamber design. The combustion chamber and valve layout move the intake valves away from the cylinder walls to reduce valve shrouding, significantly improving flow at higher lift. Shallow 11° intake/13° exhaust valve angles improve piston-to-valve clearance for high lift cams and reduce chamber volume for improved compression and efficiency. High velocity runners are optimized on the flow bench and dyno proven to outperform the competition on hydraulic roller camshaft engines. Premium materials and components, along with world-class CNC processes, guarantee uncompromising quality and durability, dimensional accuracy, and balanced flow from port-to-port. Machined castings increase strength and have a billet-like appearance. Additional features include CNC-profiled combustion chambers, 2.080"/1.600" stainless steel intake/exhaust valves, Trick Flow® by PAC Racing valve springs, and titanium retainers.
Twisted Wedge® 11R 227 heads have CNC Competition Ported runners with a premium high- resolution finish for ultimate performance. Cylinder heads are available fully assembled or as bare castings. Sold individually.
Key Features:
• 227cc intake ports and 56cc or 66cc combustion chambers
• 2.080 in. stainless steel intake valves
• 1.600 in. stainless steel exhaust valves
• .625" thick deck
• Titanium retainers
• 11 degree intake valve angle
• 13 degree exhaust valve angle
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