O-ring Street Twisted Wedge Twisted Wedge Aluminum Cylinder Heads for Small Block Ford Our Twisted Wedge heads are 50-state-emissions-legal for 1996 and earlier 289, 302, and 351W Fords! (CARB E.O. number D-369-1)
In dyno tests, a 5.0L Cobra engine equipped with a GT-40 intake, an E-303 grind cam, stud-mount rocker arms, and longer pushrods made 328 horsepower and 354 ft.-lbs. of torque. That�s 78 more horsepower and 54 ft.-lbs. more torque than the stock Cobra engine. Twisted Wedge heads can make even more power when matched up with our Track Heat EFI Intake Manifold, a Track Heat Roller Cam Kit, and Forged Pistons.
Twisted Wedge heads feature an exclusive combustion chamber design. The patented 61cc chambers feature rotated intake and exhaust valves moved over the center of the cylinder bores. As a result of optimizing the valve locations, valve angles, and combustion chamber shape, the Twisted Wedge heads use stock height exhaust ports without power loss.
The heads are machined for 2.02 in. intake/1.60 in. exhaust valves to build top end power without sacrificing bottom end torque. They don�t require flycut pistons for use with cams up to the specifications listed�no other 2.02 in.-valved head for small block Ford offers these features!
The Twisted Wedge heads are built for heavy duty use, too. They have .56 in. thick combustion chamber walls and fire deck for strength without compromising cooling capacity. Additional support risers are strategically located in the water jacket for additional rigidity and head gasket integrity.
Twisted Wedge heads have stock height intake and exhaust ports that allow the use of most OEM and aftermarket intake and exhaust manifolds. Fully assembled heads come with stainless steel valves (intakes are backcut for improved flow), valve springs, locks, retainers, rocker studs, and guide plates.

Material Combustion Chamber Volume Intake Port Volume Exhaust Port Volume Valve Sizes Valve Springs Valve Locks Retainers Rocker Studs Guideplates O-Ringed Quantity 7 Degree Machined Steel Chromemoly Steel ARP 3/8 in. For 5/16 in. Hardened Pushrods No Pair TFS-51400003 A356-T61 Aluminum 61cc 170cc 66cc 2.02 in. Intake, 1.60 in. Exhaust 1.470 in. Single Springs with Dampers 7 Degree Machined Steel Chromemoly Steel ARP 3/8 in. For 5/16 in. Hardened Pushrods Yes Pair

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