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| Rebuilt Engine Components |
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| GEX Hi-Performance Cylinder Heads |
Big Valve Heads
Big Bores, Cams, Carbs & Cranks are what it takes to make the big horsepower numbers. But they are all useless if you can't "Get it through your Heads." That's why we developed our Big Valve Performance Cylinder Heads. |
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| Bigger valves aren't just dropped in, they are matched with new larger chromoly heat treated seats and manganese bronze valve guides. The bowl area below the seats is first precision machine cut and ultimately hand blended to ensure the smoothest possible transition from the port to the seat. Sure, anyone can offer a Big Valve Head, but GEX does it Best. |
For more Cylinder Heads, please see our Empi store 
| GEX 041 Heads |
| These heads feature all new larger 39 mm intake valves and 32 mm exhaust valves with new springs. Available from rebuilt or new castings. Perfect for smaller displacement engines from 1600 and 1641 cc to intermediate size motors with mild cams from 1776 to 1904 cc. These are standard equipment on the GEX 1776, 1835 & 1904 cc engines. |
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| HE 041-375C |
39 mm intake x 32 mm exhaust, 85.5 mm cylinder bore, from New Casting (ea.) |
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| HE 041-375C92 |
39 mm intake x 32 mm exhaust, 92 mm cylinder bore, from New Casting (ea.) |
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| HE 041-375C94 |
39 mm intake x 32 mm exhaust, 94 mm cylinder bore, from New Casting (ea.) |
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| HE 041-375C/X |
39 mm intake x 32 mm exhaust, 85.5 mm cylinder bore. These rebuilt heads are no longer available, see NEW above |
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| HE 041-375C/X92 |
39 mm intake x 32 mm exhaust, 92 mm cylinder bore. These rebuilt heads are no longer available, see NEW above |
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| HE 041-375C/X94 |
39 mm intake x 32 mm exhaust, 94 mm cylinder bore. These rebuilt heads are no longer available, see NEW above |
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| GEX 042 Heads |
| With all new larger 40 mm intake and 35.5 mm exhaust, these heads work very well with larger displacement engines or smaller motors with bigger cams turning high r.p.m.'s. They have Stainless steel valves, hardened keepers, new retainers and heavy duty valve springs. Available from either a New or Rebuilt casting. These heads come standard on all GEX engines over 2000 cc's. |
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| HE 042-375C |
40 mm intake x 35.5 mm exhaust, 85.5 mm cylinder bore, from New Casting (ea.) |
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| HE 042-375C92 |
40 mm intake x 35.5 mm exhaust, 92 mm cylinder bore, from New Casting (ea.) |
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| HE 042-375C94 |
40 mm intake x 35.5 mm exhaust, 94 mm cylinder bore, from New Casting (ea.) |
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| HE 042-375C/X |
40 mm intake x 35.5 mm exhaust, 85.5 mm cylinder bore, Rebuilt (ea.) These rebuilt heads are no longer available, see NEW above |
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| HE 042-375C/X92 |
40 mm intake x 35.5 mm exhaust, 92 mm cylinder bore, Rebuilt (ea.) These rebuilt heads are no longer available, see NEW above |
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| HE 042-375C/X94 |
40 mm intake x 35.5 mm exhaust, 94 mm cylinder bore, Rebuilt (ea.) These rebuilt heads are no longer available, see NEW above |
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 Also see the GEX Stock Cylinder Heads.
Also see the GEX Power Flow Heads.
Also see the C.B. Performance 044 Heads.
Core charges are additional. Rebuildable cores may be returned freight prepaid to GEX for credit. All cylinder heads are priced as each.
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