TFS Twisted Wedge 11R 205 Cylinder Heads - (66cc)
These FTI custom built Trickflow Twisted Wedge 11R 205 series small block Ford cylinder heads feature a refined combustion chamber and valvetrain design utilizing rolled and rotated valve centerlines. These TW 11R castings now have a shallower 11 degree intake and 13 degree exhaust angle for better flow through the usable lift range. The shallow valve angle also allows for more piston to valve clearance so your camshaft parameters can be more aggressive. Trickflow's Twisted Wedge head with its patented rolled and rotated "twisted wedge" combustion chamber and valve location design had been revised for more even more flow and horsepower with this 11R package.
The FTI spec Twisted Wedge 11R heads also feature modern LS style, small diameter dual valve springs, light weight chromemoly steel retainers and 8mm valve stems. This super light valvetrain allows for a more stability in the high RPM range, especially when coupled with one of our custom hydraulic roller camshafts. Many other valve spring and valve material options are available. We can custom build your TW heads to nearly any configuration, including full bore solid roller valvetrain.
FEATURES:
- Fully CNC ported intake & exhaust runners.
- Fully CNC profiled 66cc chambers
- Casting is CNC machined to give the casting a billet look
- Modern lightweight 8mm valve stems
- 1.300" hydraulic roller valve springs
- ARP Pro-series 7/16" rocker arm studs
- Large diameter 1/2" heads bolt holes
- Optional titanium or tool steel retainers
- Fully CNC ported 205 cc intake runner volume
- Multi-angle and blended competition valve job
- Ductile iron valve seats & bronze alloy valve guides
Average Airflow for TW11R 205cc Competition Ported
| Lift Value | Intake | Exhaust |
| .100" | 71 | 60 |
| .200" | 140 | 111 |
| .300" | 208 | 150 |
| .400" | 261 | 185 |
| .500" | 298 | 212 |
| .600" | 321 | 227 |
Tests conducted at 28"/H2O
Test fixture bore size: 4.030"
66cc CNC profiled chambers
1-3/4" extension exhaust pipe
PLEASE NOTE: These FTI prepped TFS 11R cylinder heads are not an "in-stock, catalog item" and are custom built per order. The lead times will vary depending on the current schedule and available machine time. Understand that due to the nature and design of these cylinder heads, there will be no guaranteed delivery date. Plan accordingly.
PART NUMBER: TFS-TW11R-205-66
