Engine - Cylinder Heads - Ford Racing Cylinder Heads

These are the same heads that are used on the Ford Racing Performance Parts FR500 Mustang. This project car has been featured in Muscle Mustangs and Fast Fords Magazine, Car and Driver Magazine and 5.0 Mustang Magazine. Fits 1999-04 4.6L DOHC 4V Mustang Cobra- Fits 1996-98 4.6L DOHC 4V Mustang Cobra with a production 1999-02 Cobra intake or Ford Racing Performance Parts intake manifold M-9424-DP50 or M-9424-T46. Improved high flow port design. Air flow increased approximately 20% intake and 15% exhaust over production heads. Can be used with stock 1999-04 or Ford Racing intake and exhaust manifolds. Can use stock cams, valves, springs, retainers and followers. Best performance when used with Ford Racing Performance Parts high lift cams, performance valves, springs, retainers and followers. Approximately 60 HP increase when used with Ford Racing Performance Parts camshafts, intake system, headers, free flow exhaust and recalibrated computer. M-9430-E464/E465 headers recommended.

The Fast, Easy Way to Bolt-on 65 Horsepower! True Bolt-on Performance; For use on 289/302/351 Windsor-style engines. Improved air flow over original GT-40 aluminum heads, Intake flows approximately 240 cfm at .550 inch lift (at 28 inch of H20). Exhaust flows approximately 170 cfm at .500 inch lift (at 28 inch of H20), Machined for 1.94 inch Intake and 1.54 inch exhaust valve diameters, Unlike some aftermarket heads our GT-40 heads use either GT-40 or aftermarket performance: intake manifolds, headers, and valve covers. Intake port volume 178cc, exhaust port volume 62cc. High temperature exhaust valve seats. Thick deck for improved sealing, increased section thickness in critical areas for porting, and webbed rocker bosses for improved strength. Designed for bolt-on rocker arms, machined for tapered seat spark plug or gasketed. Compatible with Ford Racing intakes, headers, and valve train components. Can be machined for diagonal exhaust header flange mounting. High quality original equipment style 356-T6 aluminum castings, machining and components, Each aluminum head weighs approximately 22 lbs. – approximately 25 lbs. lighter than each cast iron GT-40 head. These GT-40 style heads use AGSF-32C spark plugs, Each GT-40X head is leak tested prior to assembly. Head assembly consists of bare head M-6049-X302/X304 and GT-40 valve train kit M-6090-X302 featuring stainless steel valves. The valve springs are compatible with all Ford Racing roller camshafts. INSTALLATION NOTES: Will not fit 1986 5.0L with flat-top pistons unless pistons are notched for valve relief. Must use head bolt kit M-6065-D289 to install cylinder heads on 289/302 blocks or head bolt and head gasket kit M-6051-A50 and intake gasket M-9439-A50/A51. Check rocker arm clearance to valve springs with production rocker arms. Check your intake manifold for port match, not all intakes are compatible due to the tall high-flow ports. Must use M-9439-A50 intake gasket.

The Fast, Easy Way to Bolt-on 65 Horsepower! True Bolt-on Performance; For use on 289/302/351 Windsor-style engines. Improved air flow over original GT-40 aluminum heads, Intake flows approximately 240 cfm at .550 inch lift (at 28 inch of H20). Exhaust flows approximately 170 cfm at .500 inch lift (at 28 inch of H20), Machined for 1.94 inch Intake and 1.54 inch exhaust valve diameters, Unlike some aftermarket heads our GT-40 heads use either GT-40 or aftermarket performance: intake manifolds, headers, and valve covers. Intake port volume 178cc, exhaust port volume 62cc. High temperature exhaust valve seats. Thick deck for improved sealing, increased section thickness in critical areas for porting, and webbed rocker bosses for improved strength. Designed for bolt-on rocker arms, machined for tapered seat spark plug or gasketed. Compatible with Ford Racing intakes, headers, and valve train components. Can be machined for diagonal exhaust header flange mounting. High quality original equipment style 356-T6 aluminum castings, machining and components, Each aluminum head weighs approximately 22 lbs. – approximately 25 lbs. lighter than each cast iron GT-40 head. These GT-40 style heads use AGSF-32C spark plugs, Each GT-40X head is leak tested prior to assembly. Head assembly consists of bare head M-6049-X302/X304 and GT-40 valve train kit M-6090-X302 featuring stainless steel valves. The valve springs are compatible with all Ford Racing roller camshafts. INSTALLATION NOTES: Will not fit 1986 5.0L with flat-top pistons unless pistons are notched for valve relief. Must use head bolt kit M-6065-D289 to install cylinder heads on 289/302 blocks or head bolt and head gasket kit M-6051-A50 and intake gasket M-9439-A50/A51. Check rocker arm clearance to valve springs with production rocker arms. Check your intake manifold for port match, not all intakes are compatible due to the tall high-flow ports. Must use M-9439-A50 intake gasket.

The Fast, Easy Way to Bolt-on 40 Horsepower! True Bolt-on Performance; For use on 289/302/351 Windsor-style engines. Improved air flow over original GT-40 cast iron and production heads, Machined for 1.94 inch intake and 1.54 inch exhaust valve diameters. Unlike some aftermarket heads our GT-40 heads use either stock or performance: intake manifolds, headers, and valve covers. Intake port volume 160cc, exhaust port volume 53cc, High temperature exhaust valve seats. Thick deck for improved sealing, increased section thickness in critical areas for porting, and webbed rocker bosses for improved strength. Designed for bolt-on rocker arms, machined for tapered seat spark plug or gasketed. Compatible with Ford Racing intakes, headers, and valve train components. Can be machined for diagonal exhaust header flange mounting. High quality original equipment style 356-T6 aluminum castings, machining and components. Each aluminum head weighs approximately 22 lbs. – approximately 25 lbs. lighter than each cast iron GT-40 head. These GT-40 style heads use AGSF-32C spark plugs. Each GT-40 head is leak tested prior to assembly. Head assembly consists of bare head M-6049-Y302 and GT-40 valve train kit M-6090-X302 featuring stainless steel valves. The valve springs are compatible with all Ford Racing roller camshafts. INSTALLATION NOTES: Will not fit 1986 5.0L with flat-top pistons unless pistons are notched for valve relief. Must use head bolt kit M-6065-D289 to install cylinder heads on 289/302 blocks. Check rocker arm clearance to valve springs with production rocker arms. Check your intake manifold for port match, not all intakes are compatible due to the tall high-flow ports. Must use M-9439-A50 intake gasket.

The Fast, Easy Way to Bolt-on 40 Horsepower! True Bolt-on Performance; For use on 289/302/351 Windsor-style engines. Improved air flow over original GT-40 cast iron and production heads, Machined for 1.94 inch intake and 1.54 inch exhaust valve diameters. Unlike some aftermarket heads our GT-40 heads use either stock or performance: intake manifolds, headers, and valve covers. Intake port volume 160cc, exhaust port volume 53cc, High temperature exhaust valve seats. Thick deck for improved sealing, increased section thickness in critical areas for porting, and webbed rocker bosses for improved strength. Designed for bolt-on rocker arms, machined for tapered seat spark plug or gasketed. Compatible with Ford Racing intakes, headers, and valve train components. Can be machined for diagonal exhaust header flange mounting. High quality original equipment style 356-T6 aluminum castings, machining and components. Each aluminum head weighs approximately 22 lbs. – approximately 25 lbs. lighter than each cast iron GT-40 head. These GT-40 style heads use AGSF-32C spark plugs. Each GT-40 head is leak tested prior to assembly. Head assembly consists of bare head M-6049-Y302 and GT-40 valve train kit M-6090-X302 featuring stainless steel valves. The valve springs are compatible with all Ford Racing roller camshafts. INSTALLATION NOTES: Will not fit 1986 5.0L with flat-top pistons unless pistons are notched for valve relief. Must use head bolt kit M-6065-D289 to install cylinder heads on 289/302 blocks. Check rocker arm clearance to valve springs with production rocker arms. Check your intake manifold for port match, not all intakes are compatible due to the tall high-flow ports. Must use M-9439-A50 intake gasket.

Revised valve angles and locations to reduce cylinder wall shrouding and improve flow. Redesigned combustion chambers to accommodate the more centrally located valves. Uses same valves, valve springs, retainers and standard 7/16 inch stud mounted roller rockers as current Ford Racing 429 Cobra Jet cylinder heads. Requires new pushrod guide plates (M-6566-SCJ) and new pushrods, M-6565-P460 or R460. Standard Cobra Jet intake and exhaust manifolds bolt on, Current valve covers fit. 2.200 inch intake valve, 1.76 inch exhaust valve, Flows approximately 330 cfm intake and 225 cfm exhaust. 72cc combustion chambers, 290cc intake runner, 148cc exhaust runner. 25-50 HP increase over current Ford Racing aluminum Cobra Jet heads depending on displacement and camshaft. The best street/strip Ford big block cylinder head on the market today! Uses Motorcraft AGSP series spark plugs. NOTE: If replacing current or production Cobra Jet heads, new intake valve notches are required.

Revised valve angles and locations to reduce cylinder wall shrouding and improve flow. Redesigned combustion chambers to accommodate the more centrally located valves. Uses same valves, valve springs, retainers and standard 7/16 inch stud mounted roller rockers as current Ford Racing 429 Cobra Jet cylinder heads. Requires new pushrod guide plates (M-6566-SCJ) and new pushrods, M-6565-P460 or R460. Standard Cobra Jet intake and exhaust manifolds bolt on, Current valve covers fit. 2.200 inch intake valve, 1.76 inch exhaust valve, Flows approximately 330 cfm intake and 225 cfm exhaust. 72cc combustion chambers, 290cc intake runner, 148cc exhaust runner. 25-50 HP increase over current Ford Racing aluminum Cobra Jet heads depending on displacement and camshaft. The best street/strip Ford big block cylinder head on the market today! Uses Motorcraft AGSP series spark plugs. NOTE: If replacing current or production Cobra Jet heads, new intake valve notches are required.