At Borowski Race Engines, we use All PRO heads on most all of our big power LS engine builds. Here are some reasons why:
- Great air flow (see chart in photo set)
- 100% virgin Alcoa aluminum ingot with no remelt
- Heads have been HIP treated (hot isostatic pressing) for greater strength and dimensional stability
- Up to 1 inch deck thickness, 0.75 inch minimum
- Enhanced six-bolt design
- Billet rocker rails instead of bosses which we have found to be prone to cracking on other heads
- Suitable for either traditional or shaft rockers
We buy these heads as porter castings and CNC port them on our 5-axis using our own profile. We are able to machine-in either LS3 or LS7 ports. These 12-1's work with either traditional or shaft rockers. Our Newen CNC seat & guide machine does the valve job and bowl blending in one operation. Click BUY NOW to watch the videos on our website to see the 5-axis and Newen at work.
Standard hardware (Manley or BTR equivalent):
- Manley Severe Duty Stainless Steel Intake Valves
- Manley Extreme Duty Inconel Exhaust Valves
- Manley NexTek Valve Springs
- Manley Machined Bead 7 Degree Valve Locks
- Manley Retainers and Locators
- Billet Aluminum Rocker Arm Stand with ARP Bolts
Not exactly what you need? Looking for really big boost, machanical cam, titanium valves, etc.? Give us a call at 815-725-2727. We can machine and assemble whatever you need from either this 12-1 or other available All Pro castings.
Be sure to watch the video with this ad to hear about these heads directly from Bob Williams, owner of All Pro Cylinder Heads. Click BUY NOW to go over to our website for more info or to place your order.
Priced per pair.
