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In-Store Pickup Location

Dart SHP Special High Performance Cylinder Heads 127122

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

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  • Order this item and get free delivery and handling on your entire order! Offer excludes truck freight and oversize fees. Valid on orders shipped in the contiguous United States.

Hazardous Material Warning
WARNING
WARNING: This product contains chemicals known to the State of California to cause cancer and reproductive harm. For more information, visit www.P65warnings.ca.gov.

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

Combustion Chamber Volume (cc): 64

Intake Runner Volume (cc): 180cc

Exhaust Runner Volume (cc): 75cc

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: No

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

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, NV, GA, TX) on our web site.

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Dart SHP Special High Performance cylinder heads provide an affordable option for those who desire the weight savings of aluminum heads for a performance street engine. These units are manufactured from A356-T6 aluminum and are designed to work with most off-the-shelf components. SHP 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 to offer excellent flow and power without the need for CNC-machined porting. They feature optimized chambers for increased combustion efficiency, as well as multi-angle intake seats. The cylinder heads' radiused exhaust seats dramatically increase their performance, and the manganese bronze valve guides increase their life.

Warranty

Most Helpful Reviews Review This Product

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

Average Customer Review

5 Star

(3)

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+See All 5 Reviews

bad heads

Summit RacingSummit Racing Verified Purchase

DRT-127122
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

3 of 4 found this review helpful.

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Reviewer: from VA

Date: May 27, 2014

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Junk,Junk, Junk

DRT-127122
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

2 of 2 found this review helpful.

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Reviewer: from TN

Date: December 01, 2014

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Up grade worth the effort.

Summit RacingSummit Racing Verified Purchase

DRT-127122
I could not be happier. I am out of the dark ages. Wonderful experience.

0 of 0 found this review helpful.

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Reviewer: from CA

Date: May 21, 2017

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Dart 180 heads

Summit RacingSummit Racing Verified Purchase

DRT-127122
Very good tolerance control on machine work.

0 of 0 found this review helpful.

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Reviewer: from Canada

Date: April 25, 2017

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Can't Beat The Value

Summit RacingSummit Racing Verified Purchase

DRT-127122
Bought these heads in 2013. Contacted Dart for recommendation for head gaskets (Fel-Pro 1010), spark plugs (NGK 5155) and roller rockers (COMP Cams 1602-16) and they were very helpful. The fit and finish and performance is very good and I've been running them for three years with no problems whatsoever. I highly recommend these heads for anyone wanting to upgrade their stock cylinder heads without breaking the bank. ...read more

0 of 0 found this review helpful.

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Reviewer: from Canada

Date: January 01, 2017

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Some parts are not legal for use in California or other states with similar laws / regulations

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