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Summit Racing® Vortec Cylinder Heads SUM-151124

Cylinder Head, Vortec, Cast Iron, Assembled, 67cc Chamber, 175cc Intake Runner, Chevy, 5.7L, Each

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INTERNATIONAL Customer Options

  • 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: Cancer and Reproductive Harm For more information, visit www.P65warnings.ca.gov.

Brand: Summit Racing

Manufacturer's Part Number: SUM-151124

Part Type: Cylinder Heads

Product Line: Summit Racing® Vortec Cylinder Heads

Summit Racing Part Number: SUM-151124

UPC: 190861096189

Combustion Chamber Volume (cc): 67

Intake Runner Volume (cc): 175cc

Cylinder Head Style: Assembled

Cylinder Head Material: Cast iron

Intake Port Shape: Rectangular

Intake Valve Diameter (in): 1.940 in.

Cylinder Head Finish: Natural

CNC-Machined Combustion Chamber: No

CNC-Machined Intake Runner: No

CNC-Machined Exhaust Runner: No

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): 1.500 in.

Valve Springs Included: Yes

Maximum Valve Lift (in): 0.520 in.

Outside Diameter of Outer Spring (in): 1.250 in.

Damper Spring Included: Yes

Number of Springs Per Valve: Single

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: No

Valve Cover Mounting Style: Centerbolt

Accessory Bolt Holes Drilled: Yes

Valve Guides Included: Yes

Valve Guide Material: Cast iron

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: No

Quantity: Sold individually.

Notes: Vortec style cylinder heads must be used with Vortec style intake manifolds, no exceptions. Click the "Suggested Parts" tab for Vortec style intake manifold options. Machine work must be done to accommodate guide plates.

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

Calculator Compression Calculator

Are you looking for a good set of heads to up the performance factor of your Vortec engine? Our Summit Performance® Vortec cylinder heads have what it takes to get the job done. Featuring wide-open intake runners, efficient combustion chambers, and a high-performance valve job, these heads deliver all of the power-building airflow you need. Made from superior iron alloy, these heads come ready-to-run for improved performance straight out of the box.

Warranty

Questions & Answers Ask a Product Question
Q:

Do these come with rocker arms already on the heads?

Asked by JOSH on September 04, 2017

A:

No

EMANUEL from GA answered on September 21, 2017

+See All Answers (4) Answer This Question

Q:

These heads are ready to run out of box correct?

Asked by JOSEPH on November 24, 2016

A:

Thank you for your question. Summit Racing SUM-151124 are ready for use out of the box.

Summit RacingSummit Racing Answer - November 28, 2016

+See All Answers (3) Answer This Question

Q:

Will these work with a 350 out of a 1971 monteo carlo with a .500 lift?

Asked by ANDREW on December 16, 2018

A:

Yes, they are good for .520 lift. You will need center bolt valve covers and a vortec intake manifold.

PHILLIP from IL answered on December 16, 2018

+See All Answers (3) Answer This Question

Q:

Are the rocker studs screw in or pressed?

Asked by ROBERT J on January 24, 2017

A:

Thanks for your question. The Summit Racing SUM-151124 Vortec cylinder heads include screw in studs.

Summit RacingSummit Racing Answer - January 24, 2017

+See All Answers (3) Answer This Question

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Most Helpful Reviews Review This Product

44 Customer Reviews for Summit Racing SUM-151124 - Summit Racing® Vortec Cylinder Heads

Average Customer Review

5 Star

(32)

4 Star

(8)

3 Star

(4)

2 Star

(0)

1 Star

(0)

+See All 44 Reviews

Nice quality for the price

Summit RacingSummit Racing Verified Purchase

SUM-151124
I chose to replace my cracked factory vortec heads with these and I am not disappointed. The castings are extremely good quality, stainless steel valves, screw-in rocker studs. When I dropped them off at my machine shop they were so impressed they went and bought another pair for a different build they were doing. Just a few things that I noticed on the heads though I want to point out. 1) they install umbrella style valve seals which for a street motor are not very good so I would recommend replacing them with the positive seal style ones. 2) whatever they finish the head gasket mating surface with isn't all that good so I had mine resurfaced for peace of mind. 3) they have the summit racing logo engrave on both ends of them. I find this sort of obnoxious, but does affect their function. Overall an excellent product. Update: I've now had experience with two sets of these heads and can say now that resurfacing them is an absolute must. We found major defects in all 4 heads after the first pass. It's not a deal killer because these are still a great deal, but I absolutely would not run these with out resurfacing otherwise they'll probably leak like a sieve. ...read more

14 of 14 found this review helpful.

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Reviewer: from TX

Date: June 16, 2014

Appearance
Ease of Installation
Price/Value
Quality

Not as Expected

Summit RacingSummit Racing Verified Purchase

SUM-151124
Right out of the box and in the picture you can see the intake runner design in these heads is very poor. I wish I would have paid better attention. They will need a considerable amount of port work on the intake runners. The valve springs are terrible. They are rated at 110lbs at 1.700 installed height. Well that would be great if they were not installed at 1.830!! Hope your running a small camshaft in these. You cannot upgrade to beehive springs because the valve spring land is not large enough to support a spring over 1.260 outer diameter unlike a factory vortec head. You get what you pay for. I put them on my truck and they did perform well. Just not a high performance head. ...read more

8 of 9 found this review helpful.

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Reviewer: from AR

Date: April 10, 2015

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Quality

reword the title

Summit RacingSummit Racing Verified Purchase

SUM-151124
The title said heads I only recieved 1. It needs to be re worded. After all when you buy shoes you get both that you need not 1. It was a little misreading.

7 of 22 found this review helpful.

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Reviewer: from MO

Date: July 31, 2014

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Price/Value
Quality

Can't beat these heads for the dough...

Summit RacingSummit Racing Verified Purchase

SUM-151124
Bought these to put in my 2001 5.7 vortec mercruiser after I had discovered a bad head/ running on 7 out of 8 cylinders. Chose these because of stainless valves and rumors that they are USA made by a high quality manufacturer. These came in looking beautiful! Painted up with high heat rattle can and they fit on an edelbrock performer (marinized)manifold perfectly. Switched from 2 barrel mercarb to edelbrock 1409. This thing sounds like a total hotrod now. Only thing to pay attention to (that I did not catch) is the spring rates of the valve springs. If you are using an aggressive cam/ high revving engine combo then you may need to upgrade to beehive springs due to the low seat pressure of the stock springs. I am using these on a roller motor but apparently they are set up for flat tappet. Awesome product. ...read more

6 of 6 found this review helpful.

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Reviewer: from MA

Date: March 08, 2014

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Ease of Installation
Price/Value
Quality

Nice quality

Summit RacingSummit Racing Verified Purchase

SUM-151124
Very nice quality heads cast and assembled in the USA. I chose these over the GM vortec heads because the decks are thicker and less prone to cracking like the GM vortec heads. My only two complaints are the intake runners are shaped oddly and not really true vortec heads although not very far off. My second complaint is that they have the "Summit Racing" logo engraved on both sides and I really wish it didn't. It looks super tacky. Other than those two things I don't think you can beat the quality for the price. ...read more

2 of 3 found this review helpful.

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Reviewer: from TX

Date: June 02, 2014

Appearance
Ease of Installation
Price/Value
Quality

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

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