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Summit Racing® Vortec Cylinder Heads SUM-151124

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

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  • Order this item and get free delivery and handling on your entire order! Oversize fees also waived on this item. Valid on orders shipped in the contiguous United States.

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

Cylinder Head Style: Assembled

Cylinder Head Material: Cast iron

Cylinder Head Finish: Natural

Combustion Chamber Volume (cc): 67

CNC-Machined Combustion Chamber: No

Intake Runner Volume (cc): 175cc

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

Intake Valve Diameter (in): 1.940 in.

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, GA, NV) on our web site.

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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.

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Most Helpful Reviews Review this Product

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

Average Customer Review

5 Star

(5)

4 Star

(3)

3 Star

(1)

2 Star

(0)

1 Star

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+See All 9 Reviews

Nice quality for the price

Summit RacingSummit Racing Verified Purchase

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

2 of 2 found this review helpful.

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Reviewer: MATT from TX

Date: June 16, 2014

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

Summit RacingSummit Racing Verified Purchase

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

1 of 1 found this review helpful.

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Reviewer: BRENDAN from MA

Date: March 08, 2014

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SUMMIT RACING VORTEC HEADS

Summit RacingSummit Racing Verified Purchase

was with the quality of these heads..summit matched me up a pro comp cam.dramatic increase in power,totaly blown away in the difference these heads made,next ill add summit headers and new HP catalytic converter and high flow muffler....My 1999 Tahoe has alot of getty up and go now .thankx Summit.

0 of 0 found this review helpful.

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Reviewer: ROBERT from NC

Date: September 29, 2014

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Great product for the price.

The heads appear to be well built. The castings are thick. I have not cranked the motor yet but can't wait.

0 of 0 found this review helpful.

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Reviewer: HAROLD from AL

Date: August 28, 2014

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Nice quality

Summit RacingSummit Racing Verified Purchase

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

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Reviewer: MATT from TX

Date: June 02, 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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