Our Whipple supercharged, water-meth injected LS3 in the photo was installed in a GMC Syclone and featured by Dart on their booth at Holley's LS Fest.
Be sure to check out the video to actually look down the throat of the throttle body during a dyno pull with spray activated.
Needless to say, the Dart Pro1 heads we put on this bad boy got some CNC love before we bolted them on.
We typically have both "as-cast" and CNC ported varieties in stock for immediate shipment. We also typically have the various valve and spring combinations on he shelf so fully-assembled can go same-day as well.
Borowski Race Engines, Inc. was first in line with Dart for these heads and we have shown what they can do with big-time power adders. Give us a call to pick out your best optioned Dart Pro1 heads.
Buy your parts from people who use them! Above Added: Sun October 23, 2016, 6:17 am PST
We have these bare heads in stock both as-cast and CNC ported. The as-cast bare price is $1,630 as shown in the ad. Our custom CNC ported version is $750 higher in price ($2,380). These heads also have been treated to a CNC valve job on our Newen Contour seat & guide machine. In our testing, this combination of additional CNC work added about 30 hp over the as-cast, out-of-the-box version.
Our preferred vendor for the valves, springs, etc is Manley. If you want the heads fully assembled, the parts and costs are:
Manley Severe Duty (Race Series) Intake valves $247.
Manley Inconel exhaust valves $482.
Manley NexTek springs, machined bead locks, steel retainers and locators $440.88.
Total Parts = $1,169.88
The assembly and shipping are no charge. We have both the as-cast and CNC ported heads in stock along with all the Manley hardware. Whatever version you want can be out the door today either bare or assembled.
To summarize, the cost for a set of these fully assembled heads, as-cast, is $2,799.88; fully assembled CNC ported heads are $3,549.88 plus any applicable tax. Above Added: Thu November 19, 2015, 4:47 am PST
Pricing is for a pair of bare heads, as received from Dart. Please call for options regarding fully assembled or ported heads. Above Added: Mon August 10, 2015, 8:49 am PST