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CYLINDER HEADS & VALVETRAIN > Cylinder Heads

ET Performance

ET Performance Cylinder Heads

All top performers pass through E/T Performance on their way to the Winners Circle. That's why we employ the most innovative design and manufacturing technologies to create the most advanced high performance CNC cylinder heads on the market today. Our strong technology base gives E/T Performance a unique ability to offer its customers solutions with the right performance, integration, and price for their application. By combining our experience and a wide range of expertise, we continue to be the technological leader in "heads first machining" for the racing industry.

Item No Description Price
LS1 11° ETP GIII 255 LS1 11° ETP GIII 255
Cylinder Head: G III LS1 11°
Application: Street / Race
Port Volume: 255cc
Chamber Volume: 35cc to 72cc
Test Bore: 4.000"
Test Pressure: 28.00" Water
Intake Valve: 2.100" Exhaust Valve: 1.570"

Valve Lift Intake Exhaust Valve Lift
.100" 71 55 .100"
.200" 147 113 .200"
.300" 227 159 .300"
.400" 285 213 .400"
.500" 324 229 .500"
.550" 337 234 .550"
.600" 349 236 .600"
.650" 357 239 .650"
.675" 360 242 .700"

Exhaust to Intake Flow Ratio 70%

*Contact for other options*
--Price is for a fully assembled pair--
6 Bolts Per Cylinder
>> Compatible with most Makes, Models, and Years 		$2750.00
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LS1 11° ETP GIII 265 40 LS1 11° ETP GIII 265 40
Cylinder Head: G III LS1 11°
Application: Street / Race
Port Volume: 265cc
Chamber Volume: 35cc to 72cc
Test Bore: 4.000"
Test Pressure: 28.00" Water
Intake Valve: 2.100" Exhaust Valve: 1.570"

Valve Lift Intake Exhaust Valve Lift
.100" 73 55 .100"
.200" 155 113 .200"
.300" 212 159 .300"
.400" 271 213 .400"
.500" 323 229 .500"
.550" 338 234 .550"
.600" 352 236 .600"
.650" 365 239 .650"
.700" 373 242 .700"
.750" 376 243 .750"

Exhaust to Intake Flow Ratio 70%

*Contact for other options*
--Price is for a fully assembled pair--
6 Bolts Per Cylinder
>> Compatible with most Makes, Models, and Years 		$2995.00
Add to
Cart
Dart

Dart Pro Cylinder Heads

Dart calls these Pro 1 LS1 cylinder heads a secret weapon. Using their proprietary "Speed Flow" technology and the same aircraft-quality 355-T6 aluminum used in their Pro Stock heads, Dart has produced these affordable, yet powerful LS1-type cylinder heads. Five-axis, CNC-blended combustion chambers generate improved airflow and flame propagation, which increase both power and torque. With two available intake-port sizes that flow very well as-cast, there is a choice for strong street performance, as well as one for maximum street performance or bracket racing. These heads have extra material on top for added flexibility to upgrade the valvetrain, and they're set up for big valves with bronze valve guides and hardened seats. They're available either bare or assembled, and they're drilled for stock accessories with stock port locations, so you can use stock components.

Item No Description Price
DAR11011112 Dart Pro LSx Cylinder Heads 205cc
Cylinder Head Style: Assembled
Cylinder Head Material: Aluminum
Cylinder Head Finish: Natural
Combustion Chamber Volume (cc): 62
CNC-Machined Combustion Chamber: No
Intake Runner Volume (cc): 205cc
CNC-Machined Intake Runner: No
CNC-Machined Exhaust Runner: No
Combustion Chamber Style: Heart
Intake Port Location: Standard
Exhaust Port Location: Standard
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): 0.625 in.
Outside Diameter of Outer Spring (in): 1.290 in.
Damper Spring Included: No
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: PC seal
Rocker Arm Studs Included: No
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: Manganese bronze
Valve Seats Machined: Yes
Valve Seat Machine Style: 4-angle intake/3-angle exhaust
Valve Seat Material: Powdered metal
Steam Holes Drilled: No
Oiling Style: Through head
Machined for O-Ring: No
Heat Crossover: No
Quantity: Sold individually.

Cylinder Head, Pro 1, Aluminum, Assembled, 62cc Chamber, 205cc Intake Runner, Chevy LS1, Each
>> Compatible with most Makes, Models, and Years 		$874.99
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DAR11021122 Dart Pro LSx Cylinder Heads 225cc
Part Number: DRT-11021122
Cylinder Head Style: Assembled
Cylinder Head Material: Aluminum
Cylinder Head Finish: Natural
Combustion Chamber Volume (cc): 62
CNC-Machined Combustion Chamber: No
Intake Runner Volume (cc): 225cc
CNC-Machined Intake Runner: No
CNC-Machined Exhaust Runner: No
Combustion Chamber Style: Heart
Intake Port Location: Standard
Exhaust Port Location: Standard
Intake Valves Included: Yes
Intake Valve Diameter (in): 2.050 in.
Exhaust Valves Included: Yes
Exhaust Valve Diameter (in): 1.600 in.
Valve Springs Included: Yes
Maximum Valve Lift (in): 0.625 in.
Outside Diameter of Outer Spring (in): 1.290 in.
Damper Spring Included: No
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: PC seal
Rocker Arm Studs Included: No
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: Manganese bronze
Valve Seats Machined: Yes
Valve Seat Machine Style: 4-angle intake/3-angle exhaust
Valve Seat Material: Powdered metal
Steam Holes Drilled: No
Oiling Style: Through head
Machined for O-Ring: No
Heat Crossover: No
Quantity: Sold individually.

Cylinder Head, Pro 1 LS-1, Aluminum, Assmbled., 62cc Chamber, 225cc Intake Runner, Chevy, 5.7L, 1997-2004,Each
>> Compatible with most Makes, Models, and Years 		$874.99
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Edelbrock

Edelbrock Cylinder heads

Edelbrock's Performer RPM Xtreme LS series cylinder heads give you the best combination of as-cast port design and custom CNC technology in critical areas (the combustion chamber, intake entry, exhaust exit, and intake and exhaust bowls) for improved airflow and performance. This combination provides for affordable cylinder heads at a lower cost than typical fully CNC cylinder heads.

Additional features include:

* 5/8 in. thick deck can be machined for additional compression
* 214cc intake ports
* 80cc exhaust ports
* Stainless steel 2.02 in. intake valves and 1.57 in. exhaust valves

Item No Description Price
61949 Edelbrock LS1 Cylinder Heads
Edelbrock's Performer RPM Xtreme LS series cylinder heads give you the best combination of as-cast port design and custom CNC technology in critical areas (the combustion chamber, intake entry, exhaust exit, and intake and exhaust bowls) for improved airflow and performance. This combination provides for affordable cylinder heads at a lower cost than typical fully CNC cylinder heads.

Additional features include:

* 5/8 in. thick deck can be machined for additional compression
* 214cc intake ports
* 80cc exhaust ports
* Stainless steel 2.02 in. intake valves and 1.57 in. exhaust valves
>> View Item Compatibility
 $1024.99
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