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Summit Racing® Cast Iron Cylinder Heads for Small Chevy SUM-152123

Get Free Shipping with Your Order over $99!

Cylinder Head, Cast Iron, Assembled, 72cc Chamber, 165cc Intake Runner, Chevy, 302, 327, 350, 400, Each

Estimated Ship Date: Tomorrow Would you rather pick it up? Select Location

  • 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-152123

Part Type: Cylinder Heads

Product Line: Summit Racing® Cast Iron Cylinder Heads for Small Chevy

Summit Racing Part Number: SUM-152123

Cylinder Head Style: Assembled

Cylinder Head Material: Cast iron

Cylinder Head Finish: Natural

Combustion Chamber Volume (cc): 72

CNC-Machined Combustion Chamber: No

Intake Runner Volume (cc): 165cc

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): 2.020 in.

Exhaust Valves Included: Yes

Exhaust Valve Diameter (in): 1.600 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: Center and perimeter bolt

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: Yes

Quantity: Sold individually.

Notes: Will accommodate center bolt valve covers with minor modifications. Features ductile iron seats on exhaust ports only for use with unleaded gas. Machine work must be done to accommodate guideplates.

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

Calculator Compression Calculator

Think you have to scour the local bone yards to find a decent set of GM's old double hump or fuelie cylinder head castings? Not true. In fact, we've brought back classic Chevy performance in a big way with these ready-to-run heads for small block Chevy. Our versions of the popular GM cylinder heads offer great performance for less than it would cost to rebuild an old set of double hump castings.

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Make: CHEVROLET

Beginning Year: 1962

Ending Year: 1969

Engine Type: V8

Liter: 5.4

CID: 327

Engine Size: 5.4L/327

Engine Family: Chevy small block Gen I

Make: CHEVROLET

Beginning Year: 1967

Ending Year: 1968

Engine Type: V8

Liter: 5.0

CID: 302

Engine Size: 5.0L/302

Engine Family: Chevy small block Gen I

Make: CHEVROLET

Beginning Year: 1967

Ending Year: 1986

Engine Type: V8

Liter: 5.7

CID: 350

Engine Size: 5.7L/350

Engine Family: Chevy small block Gen I

Make: CHEVROLET

Beginning Year: 1970

Ending Year: 1980

Engine Type: V8

Liter: 6.6

CID: 400

Engine Size: 6.6L/400

Engine Family: Chevy small block Gen I

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4 Results Found

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ARP 134-3601 - ARP High Performance Series Cylinder Head Bolt Kits

Click here for more information about ARP 134-3601 - ARP High Performance Series Cylinder Head Bolt Kits

Cylinder Head Bolts, High Performance, Hex Head, Chevy, Small Block, Kit

Part Number: ARP-134-3601

Estimated Ship Date: Tomorrow

$84.70

Fel-Pro 7733PT2 - Fel-Pro Head Gaskets

Click here for more information about Fel-Pro 7733PT2 - Fel-Pro Head Gaskets

Head Gasket, PermaTorque, 4.125 in. Bore, .039 in. Compressed Thickness, Chevy, 265-350, Each

Part Number: FEL-7733PT2

Estimated Ship Date: Tomorrow

$12.97

NGK Spark Plugs 6630 - NGK V-Power Spark Plugs

Click here for more information about NGK Spark Plugs 6630 - NGK V-Power Spark Plugs

Spark Plug, V-Power, Tapered Seat, 14mm Thread, .460 in. Reach, Projected Tip, Resistor, Each

Part Number: NGK-6630

Estimated Ship Date: Tomorrow

$3.49

Fel-Pro VS12869 - Fel-Pro PermaDry Valve Cover Gaskets

Click here for more information about Fel-Pro VS12869 - Fel-Pro PermaDry Valve Cover Gaskets

Valve Cover Gaskets, Cork, Chevy, Small Block, Pair

Part Number: FEL-VS12869

Estimated Ship Date: Tomorrow

$8.97

4 Results Found

Summit Racing SUM-152 - Summit Racing® Rocker Arm Studs

Click here for more information about Summit Racing SUM-152 - Summit Racing® Rocker Arm Studs

Rocker Arm Studs, 3/8-24 in. Thread, 1.700 in. Effective Stud Length, Set of 8

Part Number: SUM-152

Estimated Ship Date: Tomorrow

$19.97

Dart 21311600-8 - Dart Severe-Duty Stainless Steel Valves

Click here for more information about Dart 21311600-8 - Dart Severe-Duty Stainless Steel Valves

Valves, Severe Duty, Intake, Stainless Steel, 1.600 in. Head Diameter, Chevy, Small Block, Set of 8

Part Number: DRT-21311600-8

Estimated Ship Date: Tomorrow

$103.45

  • Free Shipping

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

Dart 21312020 - Dart Severe-Duty Stainless Steel Valves

Click here for more information about Dart 21312020 - Dart Severe-Duty Stainless Steel Valves

INTAKE VALVE, Each

Part Number: DRT-21312020

Estimated Ship Date: Tomorrow

$13.32

Dart 21311600 - Dart Severe-Duty Stainless Steel Valves

Click here for more information about Dart 21311600 - Dart Severe-Duty Stainless Steel Valves

EXHAUST VALVE, Each

Part Number: DRT-21311600

Estimated Ship Date: 2/25/2015 (if ordered today)

$13.32

  • Drop Ship

    This part is normally shipped directly from the manufacturer / Supplier.

Most Helpful Reviews Review this Product

12 Customer Reviews for Summit Racing SUM-152123 - Summit Racing® Cast Iron Cylinder Heads for Small Chevy

Average Customer Review

5 Star

(11)

4 Star

(1)

3 Star

(0)

2 Star

(0)

1 Star

(0)
+See All 12 Reviews

good value for the price

Summit RacingSummit Racing Verified Purchase

heads worked really well in my boat application. machinist was impressed with the quality of the heads- (this guy builds sprint car engines). was cheaper buying new than reconditioning old heads. all the external accessories bolted up without issue

1 of 1 found this review helpful.

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Reviewer: GEORGE from WA

Date: May 01, 2014

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Great value

Summit RacingSummit Racing Verified Purchase

These are super!! I have them on a 406 sb chevy and love the performance!

1 of 1 found this review helpful.

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Reviewer: BERNARD from NM

Date: March 08, 2014

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Quality

Summit Racing Iron Cylinder Heads SBC

Summit RacingSummit Racing Verified Purchase

Just installed these heads on my SBC 350. I can really feel the difference. I recommend painting them before install.

0 of 0 found this review helpful.

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Reviewer: ROBERT from CA

Date: January 13, 2015

affordable

Summit RacingSummit Racing Verified Purchase

Looked and looked for a decent pair of aftermarket street heads that didn't cost much but were of good quality and performance. By performance I'm comparing to stock factory heads. It would've cost me more to repair my old 441's. Nice looking machine work. I did notice the ports will need gasket matched at the least. For a mild street motor for my son's first truck these will be perfect. ...read more

0 of 0 found this review helpful.

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Reviewer: CHAD from KS

Date: January 01, 2015

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great Deal for the money

Summit RacingSummit Racing Verified Purchase

I have had these heads on two different small blocks and they have always performed satisfactory...Got them on a Gen.1 350 now and runs like a champ...

0 of 0 found this review helpful.

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Reviewer: RICHARD from MO

Date: December 14, 2014

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Price/Value
Quality

Good OE Replacement

Summit RacingSummit Racing Verified Purchase

Nice looking casting and are marginally better performers than most old school original heads. Be warned these will not work with 1.6 rockers unless you elongate the pushrod guide slots. If drilling 30-45 degree steam holes for a 400, be careful with hole nearest the temp sender hole. The water jacket tends to snag and break the bit on break through. I recommend drilling partially through with the pilot bit. Then slowly finish with an 1/8 or 9/64. If you do break off, try to punch the bit on through. It worked for me and easily comes out of the water jacket. Bottom line, $100 more than rebuilding worn out heads. I'd say it's a bargain! ...read more

0 of 0 found this review helpful.

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Reviewer: BRIAN from OK

Date: December 08, 2014

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excellent head for the money

Summit RacingSummit Racing Verified Purchase

WOW GOOD HEADS!!! CHEAP!!! WHEN I CRACKED ONE OF MY CAMEL BACK HEADS I THOUGHT THAT IT WAS THE END OF THE WORLD. I SUPRISED TO SEE SUMMIT HAS THESE AWSOME NEW HEADS, FULLY ASSEMBLED AND READY TO GO. I RECOMMEND TO CLEAR COAT THEM. BE ADVISED THAT THEY COME WITH THE SCREW IN STUDS, I DID NOT KNOW THAT AND I BOUGHT SCREW IN STUDS THAT I DID NOT NEED. GREAT BANG FOR THE BUCK! MADE IN THE USA. ...read more

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Reviewer: GEORGE from CA

Date: November 03, 2014

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WHY REBUILD?

Summit RacingSummit Racing Verified Purchase

It was 75.00 more for these heads then rebulding my old ones. When the boxs arrive the maker of these heads are written on the boxs. Wow was I suprised. Make sure you wash them and blow then good.

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Reviewer: STEVE from WA

Date: September 04, 2014

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summit 152123

Summit RacingSummit Racing Verified Purchase

heads were great good casting over stock, only thing was wish they would have listed size of hole for temp sensor and plug

0 of 0 found this review helpful.

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Reviewer: JAY from FL

Date: August 04, 2014

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Summit Racing® Cast Iron Cylinder Heads for Small

Summit RacingSummit Racing Verified Purchase

Good quality and affordable heads. They run great on stock 350 chevy. Would recommend these to anyone over rebuilt or remanufactured heads.

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Reviewer: DUANE from MO

Date: June 07, 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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