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The water jacket on the #1 cylinder has been expanded for additional cooling capacity
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Callies Says - Better by Design
Fully Configurable lap top Gauge Panel – Life-like gauge cluster on your laptop screen
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All Pro Cylinder Solid LS7 Heads - Mechanical Cam, Titanium Valves Diamond The water jacket on theThis is the head we use for all of our big boost, billet block LS engines with no water. The 12 4 All Pro solid casting features reinforced exhaust flange, Borowski custom CNC port and chamber design, custom Ferrea titanium intake & exhaust valves. The spring kit features Manley NexTek valve springs (800 lbs. in. rate; 1. 130 in. coil bind height), Manley machined 10 degree bead locks and Manley titanium retainers. The heads are amazingly strong and
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