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Blue Thunder has long been known as a leading manufacturer of high performance cylinder heads for 460 Ford high performance and racing engines. The Blue Thunder 460 cylinder head is available in six configurations. All have an improved "Cobra Jet" intake port which is capable of peak flow in the 410 cfm range. Combustion chambers are of a proprietary design which includes a slight revision in valve placement to improve flow. 74, 80, and 100cc Combustion chambers are available. The exhaust ports are where most of the magic is, as each cylinder head is available with with either a raised port "Cobra Jet" port or for maximum power a big block Chevrolet exhaust port is optional.

CHP has available Blue Thunder Cylinder heads in various stages of porting for all applications, both high performance and all out racing.

Stage 1: Consists of a complete, assembled cylinder head cylinder heads. Danin "Brutal Duty" Stainless Steel Valves are used, with heads diameters of 2.250 (intake) and 1.880 (exhaust) Springs for a Solid Roller camshaft are available as an upgrade. Retainers are Chrome-Moly Steel, seals are Viton.

Stage 2: Includes Stage 1, with pocket porting, intake port match and cleanup, exhaust is ported throughout the port.

Stage 3: Includes Stage 1 and 2,  plus intake is ported throughout the port, chambers are reshaped and polished.

351 Cleveland Ford Cylinder Heads

This head is a canted valve (351C valve angles and location) Yates intake port location head that can use 2.02" to 2.20" intake valves and 1.60" to 1.70" exhaust valves. 5Occ and 70cc combustion chambers are available. Two different exhaust ports are available. The high exhaust port is Yates bolt pattern and height. The low exhaust port has a double Cleveland bolt pattern. The lower bolt pattern is stock Cleveland height with a port that functions as a "stuffed Cleveland" port, in which the bottom of the port is filled. The second bolt pattern is .750" higher and aligns the floor of the port with floor of the flange. The top of the port can then be cut out to match the flange for increased exhaust flow.

All ports have .400" wall on them. This head has partly machined alcohol down nozzles that can be finished with careful use of a hand held drill.

Manifolds for the head are available from both Ford Motorsport and Edelbrock.

This head is designed for the 350-426 cu. in. small block market, in serious racing engines. Intake ports with 10 to 15 minutes of work, will flow approx. 350-360 cfm at 28", with a 2.20 valve. (Please note: use a valve over 2.125" only, in a big bore (4.125" - 4.155") application as cylinder wall valve shrouding is a problem). This intake port has already been ported to more than 395 cfm at .800 lift. The Yates height exhaust port will flow approx. 240 cfm at 28" with a 1.70" valve at .800 lift (with approx. 10-15 minutes work per port). This port has already been ported to 285+ cfm with a full porting.

This cylinder flows roughly 320/195 @ .800 lift (out of the box). Max capability (Stage IV, with a 4.125 bore) is roughly 410/295cfm @ .800 lift. (measured @ 20" of water).

Stage 1 : Consists of a complete, assembled cylinder head cylinder heads. Danin "Brutal Duty" Stainless Steel Valves are used, with head diameters of 2.250 (intake) and 1.880 (exhaust) Springs for a Solid Roller camshaft are available as an upgrade. Retainers are Chrome-Moly Steel, seals are Viton.

Stage 2 : Includes Stage 1, with pocket porting, intake port match and cleanup, exhaust is ported throughout the port.

Stage 3 : Includes Stage 1 and 2,  plus intake is ported throughout the port, chambers are reshaped and polished.