We are a full engine machine shop and dyno test facility, along with an engine installation center and parts warehouse.  Buy with confidence--our heads are custom designed and assembled by a master engine builder with 20 or more years experience and the heads ship with a full build sheet showing spring pressures, install height, coil bind measurements, and other specification. 

We can set up the heads for any lift camshaft solid or hydraulic, and we offer the heads in 4 bolt or 6 bolt for extra clamping for high compression engines, forced induction, and/or nitrous engines.  We can build the heads with special INCONEL for forced induction applications, and we offer these heads as cast or ported flowing from approx 370cfm to 425cfm.

IMPORTANT:
The buy it now price is for a single bare Dart aluminum LS3 cylinder head  NOT assembled as cast non-ported head in choice of 4-bolt or 6-bolt.  If you would like to buy a pair you must buy two at check-out.  Additionally, if you would like our shop to custom build the heads and ship assembled, contact us for a price quotation the the additional parts and labor.  We can custom build these heads for you for any size or type of camshaft!  These heads sell on Summit Racing for over $2500 for the pair assembled with only a lower lift valve spring, see Dart part # 11030153. Sold on Summit for $1275.54 each.  We can build them for up to .750 lift for hydraulic lifters, and .800+ lift for solid lifers. We can sell these head assembled with better than Dart parts and blueprinted to your cam or our custom cams for around same price or less than the Dart assembled part number!


Call Jerry at (785) 408-2911 or message through Ebay if you would like the heads set up differently than described at the buy it now price.

NOTE: Photos in Ebay item are for illustration purposes only and are not the actual item.  Shipping and handling times vary depending on head set up from 1 week to 6 weeks or more in some cases.  Contact us ahead of purchasing to check time-frame. Certain orders qualify for free shipping!

Dart LS Next block and added nitrous. Engine Labs online magazine ran the story as a tech feature.

Quoting the article": "By creating a cylinder head casting that performs like a ported design right out of the box, Dart has developed a serious advantage—especially when you take the price point of these cylinder heads into account, which Maskin says will hit the marketplace approximately $200 less per head than competing designs, while offering better performance."

QUICK OVERVIEW
LS3 Style cylinder head
Available Bare or Complete (call for options and pricing)
LS3 Exhaust port locations and bolt pattern
2.165-inch Intake Valve, 1.600-inch Exhaust Valve
RMR virgin heat treated 355-T61 cast aluminum material
280cc intake runners, 102cc exhaust runners
Accepts OEM or LS3 aftermarket intake manifolds
Accepts OEM or aftermarket LS3 valve-train
+/- 0.500-inch thick decks for stability in boosted and nitrous applications

Details
Dart's all-new Pro1 LS3 cylinder head features the latest in port and combustion chamber design. The company's investment in casting and tooling capabilities allows them to produce a cylinder head design that is unrivaled in the market.

Assembled cylinder heads are available with 1.290-inch beehive or 1.295-inch dual valve springs to suit nearly any application. The valve seats feature a five-angle design for the intake valve and a three-angle design for the exhaust valves to promote excellent flow.

Cylinder heads work on LS and LS Next-style blocks with a four or six-bolt configuration for maximum clamping ability.
Racing inspired combustion chamber improves flame propagation and increases air flow.

Dart has designed these as-cast cylinder heads to perform like ported cylinder heads--maximizing performance and minimizing your investment.

Internal testing with these cylinder heads prove they are capable of well over 1,000 horsepower and 1,000 pound feet of torque.

Material RMR virgin heat treated 355-T61 cast aluminum
Combustion Chambers 68cc
Intake Valve Diameter 2.165-inch
Intake Port Volume 280cc
Intake Port Dimensions Stock LS3 location and bolt pattern
Intake Port Location Stock LS3 location and bolt pattern
Intake Gasket OE or Fel-Pro LS3
Exhaust Valve Diameter 1.600-inch
Exhaust Port Volume 102cc
Exhaust Port Dimensions 1.750-inch x 1.550-inch
Exhaust Port Location Stock LS3 port location and pattern
Exhaust Gasket OE or Fel-Pro 1438
Flow, Intake 370 cfm @ .700-inch lift, 28” water
Flow, Exhaust 252 cfm @ .700-inch lift, 28” water

WARNING: This product can expose you to chemicals which is/are known to the State of California to cause cancer and/or reproductive harm.