Trick Flow Dhc Sbc 175cc Aluminum Cylinder Head For Small Block Chevrolet - With Accessory Bolt Holes

No longer will fans of the small block Chevy have to choose between vintage looks or modern cylinder head power—Trick Flow's DHC 175 cylinder heads give you both!

Made from premium grade, lightweight A356-T61 aluminum, DHC 175 heads feature the exterior styling and straight spark plug holes that deliver the nostalgic appearance of the original factory performance 186, 291, 461, 462 "double hump" or "camel back" castings that customers want. 60cc CNC-profiled combustion chambers combined with a state of the art valve job and CNC blended bowl work 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. Ductile iron valve seats for use with unleaded fuel, stainless steel valves, bronze alloy valve guides, multi-angle valve seat machining, and decks and walls cast extra thick for increased casting strength and to provide extra room for porting round out the features. These TFS-30210006 feature accessory bolt holes for 69' and later setups and springs for hydraulic flat tappet camshafts.
Cylinder Head, DHC 175, Fast As Cast, Assembled, 1.470 in. Springs, Accessory Bolt Holes, Small Chevy, Each Brand: TFS - Trick Flow Specialties Manufacturer's Part Number: TFS-30210006 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. hydraulic flat tappet 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: Yes 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.

Install Instructions