Hello, This auction is for a pair (2) of brand new bare aluminum big block Chevy cylinder heads.  These are large oval port cylinder heads with open style 115cc combustion chambers and 300cc intake runners.  In addition to the nearly 80lb weight savings these heads offer over factory cast iron heads, they will yield about a 40hp gain over stock GM 990 castings.  In unported form these heads will support 500+ horsepower on pump gas.  If you are looking for a race grade head that is comparable to Edelbrock, Dart, Trick Flow, Pro Comp, or AFR at a fraction of the price look no farther then these. These heads are cnc machined and assembled by us. These heads work great on Caruretor and fuel injection engines and no special gaskets needed.The features of these are as follows:

1. Cylinder Head Material: Aluminum
2. Color: Silver
3. Interchange Part Number: See-301
4. Cylinder Head Style: Bare
5. Cylinder Head Finish: Natural
6. Combustion Chamber Volume (cc): 115 cc
7. CNC-Machined Combustion Chamber: No
8. Intake Runner Volume (cc): 300 cc
9. Exhaust Runner Volume (cc): n/a
10. CNC-Machined Intake Runner: No
11. CNC-Machined Exhaust Runner: No
12. Intake Port Shape: Oval
13. Intake Port Location: Standard
14. Exhaust Port Shape: Square
15. Exhaust Port Location: Standard
16. Spark Plug Style: Standard Location
17. Comp. Valve Job: No
18. Intake Valves Included: No
19. Intake Valve Diameter (in): 2.250 in.
20. Exhaust Valves Included: No 
21. Exhaust Valve Diameter (in): 1.880 in. 
22. Valve Springs Included: No 
23. Damper Spring Included: No 
24. Retainers Included: No 
25. Locks Included: No 
26. Valve Stem Seals Included: No 
27. Rocker Arm Studs Included: No 
28. Rocker Arms Included: No 
29. Rocker Arm Nuts Included: No 
30. Guideplates Included: No 
31. Valve Cover Mounting Style: Perimeter Bolt
32. Accessory Bolt Holes Drilled: Yes 
33. Intake Valve Angle: 45 deg.
34. Exhaust Valve Angle: 45 deg.
35. Valve Guides Included: Yes 
36. Valve Guide Material: Bronze 
37. Valve Seats Machined: Yes
38. Valve Seat Machine Style: 3-angle
39. Valve Seat Material: Ductile Iron 
40. Steam Holes Drilled: No
41. Oiling Style: Through pushrod 
42. Machined for O-Ring: No 
43. Heat Crossover: No
44. Quantity: Sold as a Pair (2).
45. Notes: This head is not Speedmaster/Procomp E.


300cc Oval Port Cylinder Head-Flow Chart cfm @28" H2O
valve size.200.300.400.500.550.600.650.700
2.250 int.163235289330346360368375
1.880 exh.135180230262271278286292

If you have any questions feel Free to contact me via the ebay Messenger. Thanks for looking!