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Dart SHP Special High Performance Cylinder Heads 127122

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Cylinder Head, SHP, Aluminum, Assembled, 64cc Chamber, 180cc Intake Runner, Chevy, 327, 350, 400, Each

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Brand: Dart

Manufacturer's Part Number: 127122

Part Type: Cylinder Heads

Product Line: Dart SHP Special High Performance Cylinder Heads

Summit Racing Part Number: DRT-127122

Cylinder Head Style: Assembled

Cylinder Head Material: Aluminum

Cylinder Head Finish: Natural

Combustion Chamber Volume (cc): 64

CNC-Machined Combustion Chamber: No

Intake Runner Volume (cc): 180cc

Exhaust Runner Volume (cc): 75cc

CNC-Machined Intake Runner: No

CNC-Machined Exhaust Runner: No

Combustion Chamber Style: Heart

Intake Port Location: Standard

Exhaust Port Shape: Square

Exhaust Port Location: Standard

Spark Plug Style: Straight

Intake Valves Included: Yes

Intake Valve Diameter (in): 2.020 in.

Exhaust Valves Included: Yes

Exhaust Valve Diameter (in): 1.600 in.

Valve Springs Included: Yes

Maximum Valve Lift (in): 0.620 in.

Outside Diameter of Outer Spring (in): 1.437 in.

Damper Spring Included: No

Number of Springs Per Valve: Dual

Retainers Included: Yes

Retainer Material: Steel

Locks Included: Yes

Lock Style: 7 degree

Valve Stem Seals Included: Yes

Valve Stem Seal Style: Umbrella

Rocker Arm Studs Included: Yes

Rocker Arm Nut Thread Size: 3/8-24 in.

Rocker Arms Included: No

Rocker Arm Nuts Included: No

Guideplates Included: Yes

Guideplate Pushrod Size: 5/16 in.

Valve Cover Mounting Style: Center and perimeter bolt

Accessory Bolt Holes Drilled: Yes

Intake Valve Angle: 23

Exhaust Valve Angle: 23

Valve Guides Included: Yes

Valve Guide Material: Manganese bronze

Valve Seats Machined: Yes

Valve Seat Machine Style: 5-angle intake/2-angle exhaust

Valve Seat Material: Powdered metal

Steam Holes Drilled: No

Oiling Style: Through pushrod

Machined for O-Ring: No

Heat Crossover: No

Quantity: Sold individually.

Notes: Hydraulic roller of solid flat tappet applications.

In-Store Pickup: Choose In-store pick-up (OH, GA, NV) on our web site.

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These Dart SHP Special High Performance cylinder heads are designed to provide an affordable option to those looking for the weight savings of aluminum heads for a performance street engine. They are manufactured from A356-T6 aluminum and are designed to work with most off-the-shelf components. These SHP cylinder heads are available with your choice of 64cc or 72cc combustion chambers and come in both 180cc and 200cc intake runner ports that are precision-cast and designed to offer excellent flow and power without the need for CNC-machined porting. They feature optimized chambers for increased combustion efficiency and multi-angle intake seats. The cylinder heads' radiused exhaust seats dramatically increase their performance and the manganese bronze valve guides increase their life.

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2 Customer Reviews for Dart 127122 - Dart SHP Special High Performance Cylinder Heads

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bad heads

Summit RacingSummit Racing Verified Purchase

casting issues on these. pushrods hit the edge. had to file it down. stock rockers don't work. they hit the springs. possibly needs longer pushrods. bleh

2 of 3 found this review helpful.

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Reviewer: HARRY from VA

Date: May 27, 2014

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Ease of Installation
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Junk,Junk, Junk

The machine work on these heads is really bad. I bought a set of these heads about a year ago and ran them on two different engines with the same poor results on both. The pushrods are way out of alignment jamming them hard against the sides of the intake ports and the water ports. Also when the head bolt holes were drilled they broke through the inside of the intake port requiring brass bushings to be installed. With these heads both engines seemed to have a miss or dead cylinder or cylinders under load, and they seemed to be leaking oil into the combustion chambers.Put a different set of heads on one of the above mentioned engines and it ran fine without the dart heads. Just a poorly designed head. I am ASE certified in engine repair and performance so I know what I'm doing when it comes to engine assembly. I even sent them back to dart for repair and they did nothing to fix them. I WOULD NOT recommend these heads to anyone. JUNK! ...read more

1 of 1 found this review helpful.

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Reviewer: RANDALL from TN

Date: December 01, 2014

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Some parts are not legal for sale or use in California on any pollution-controlled motor vehicles

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