Nostalgic appearance—check.
Modern performance—check.
The best of both—checkmate!
Trick Flow’s DHC 175 cylinder heads give small block Chevy enthusiasts a new performance option. No longer will anyone have to choose between vintage looks or modern cylinder head power—with DHC 175 heads you get both!
DHC 175 heads are made from premium grade A356-T61 aluminum and have the exterior styling and straight spark plug holes that deliver the nostalgic appearance customers want. On the inside, 60cc CNC-profiled combustion chambers with blended bowl machining under the valves and small cross-section intake runners promote low-RPM torque increases and boost high-RPM horsepower. The runners are finished with Trick Flow’s superior Fast As Cast® process that precisely duplicates the runner profile and performance levels of fully CNC-ported heads without the added machining cost. In keeping with the vintage design, the heads are available with or without accessory bolt holes cast into them.
Other performance improvements include bronze alloy valve guides, ductile iron valve seats, and multi-angle valve seat machining on precision Serdi® equipment. Plus, the decks and walls are cast extra thick to increase casting strength and provide plenty of material for future porting.
Trick Flow DHC 175 cylinder heads are available fully assembled or as bare castings. Sold individually.
Trick Flow® DHC™ 175 Cylinder Heads for Small Block Chevrolet TFS-30210002
Cylinder Head, DHC™ 175, Fast As Cast®, Assembled, 1.470 in. Springs, No Accessory Bolt Holes, Small Chevy, Each
Part Number:
TFS-30210002
Part Type:
UPC:
0842645120428
Combustion Chamber Volume (cc):
60
Intake Runner Volume (cc):
175cc
Exhaust Runner Volume (cc):
74cc
Cylinder Head Style:
Assembled
Cylinder Head Material:
Aluminum
Intake Port Shape:
Rectangular
Intake Valve Diameter (in):
2.020 in.
Cylinder Head Finish:
Natural
CNC-Machined Combustion Chamber:
Yes
CNC-Machined Intake Runner:
No
CNC-Machined Exhaust Runner:
No
Combustion Chamber Style:
Heart
Intake Port Location:
Standard
Exhaust Port Shape:
D-port
Exhaust Port Location:
Standard
Spark Plug Style:
Straight
Intake Valves Included:
Yes
Exhaust Valves Included:
Yes
Exhaust Valve Diameter (in):
1.600 in.
Valve Springs Included:
Yes
Maximum Valve Lift (in):
0.540 in.
Outside Diameter of Outer Spring (in):
1.470 in.
Damper Spring Included:
No
Number of Springs Per Valve:
Single
Retainers Included:
Yes
Retainer Material:
Chromoly steel
Locks Included:
Yes
Lock Style:
7 degree
Valve Stem Seals Included:
Yes
Valve Stem Seal Style:
Positive stop
Rocker Arm Studs Included:
Yes
Rocker Arm Nut Thread Size:
7/16-20 in.
Rocker Arms Included:
No
Rocker Arm Nuts Included:
No
Guideplates Included:
Yes
Guideplate Pushrod Size:
5/16 in.
Valve Cover Mounting Style:
Perimeter bolt
Accessory Bolt Holes Drilled:
No
Intake Valve Angle:
23
Exhaust Valve Angle:
23
Valve Guides Included:
Yes
Valve Guide Material:
Bronze
Valve Seats Machined:
Yes
Valve Seat Machine Style:
3-angle
Valve Seat Material:
Ductile iron
Steam Holes Drilled:
No
Oiling Style:
Through pushrod
Machined for O-Ring:
No
Heat Crossover:
Yes
Quantity:
Sold individually.
Notes:
For use with a minimum bore diameter of 4.000 in.
Suggested Parts
Parts that may improve the performance or installation of part number TFS-30210002
Trick Flow Specialties TFS-92000 - Trick Flow® Cylinder Head Bolt Kits
Cylinder Head Bolt Kit, Hex Head, Chromoly Steel, Black Oxide Finish, Chevrolet 262-400, Each
ViewRepair Parts
Trick Flow Specialties TFS-51400614 - Trick Flow® Rocker Arm Studs
Rocker Arm Studs, 7/16-20 in. Thread, 1.90 in. Effective Stud Length, Ford/Chevy, Set of 16
View
Trick Flow Specialties TFS-51400454 - Trick Flow® Valve Seals
Valve Stem Seals, Viton® Fluoroelastomer, Positive Stop, .500 in. Guide, 11/32 in. Valve Stem, Set of 16
View
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