Complete Assembled Pair of
Aluminum Big Block Chevy Heads
Square 320cc Intake port
115cc chambers with improved flow
Exhaust ports raised for enhanced flow
Will fit 366, 396, 402, 427, 454, 502 and stroker versions of.
Fits Mark IV, V and VI blocks with using correct head gaskets
Stronger Pressure casted Aircraft grade 356A aluminum alloy heat treated to T6 specs.newer process with less porousity and better consistance of port sizing
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Harden valve seats
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Bronze valve guide
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Standard accessory bolt holes
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Plus .400 thick deck for severe uses
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2.250 intake valves
1.880 exhaust valves
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Valves are one piece forging EV-8 stainless steel alloy
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Harden chrome plated stems
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Undercut stems powerflow design for improved flow
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Fully machined and swirl polished stems
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Harden tips NO lash caps required
Valve springs
1.510 Diameter (Dual spring for Hyd. flat tappet)
110lbs at 1.900" installed height
310lbs at 1.300" open pressure(.600 Lift)
Max. lift .600
If your application requires different springs then shown just Email and we will quote if price is different CGMshipping@AOL.COM
We machine and assemble all heads in our shop to your application using high quality parts
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High temperature Positive viton valve seals for superior oil control
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3/8" guideplates high quality heat treated steel
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7/16" screw in rocker studs 190,000psi
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7 degree chrome moly retainers to match springs
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7 degree 11/32" valve locks
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Harden spring cups and/or shims
5 angle intake valve seat and radius exhaust seat for improved flow
These Heads flow over 750HP without porting work!!!
Thats over 380cfm at .650 lift
We are a premier High performance machine shop with over 20 years in business. All heads are inspected and machine work done in our shop. We DO NOT just assemble these heads each set is machined and built to the buyers application.Buyer responsible for fitment like any HP parts. If you have any question please contact us..
Check out our other cylinder heads and engine kit auctions
CGM MOTORSPORTS
8211 Cloverleaf Dr. Millersville, Md 21108
Phone (410)766-SHOP(7467)
EMail CGMSHIPPING@AOL.COM