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Mustang 1985-1995 Small Block V8 Hydraulic Roller Tappet Camshaft {{ variantColorValue }}
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Pick up at your selected dealer is free
Make the most of your vehicle – and your lifestyle
Engineered to fit your vehicle
About This Product
The legendary X303 cam developed by Ford Performance for the 5.0L Fox-body Mustang. This cam provides a noticeable power improvement and lumpy idle while maintaining good driveability with a manual transmission. Works well with carburetors or mass air fuel injection.
- Fits 1985 and later 302 roller cam blocks
- Will also fit 1963-1984 non-roller cam 289-302 blocks when used with hydraulic roller lifters
- Will also fit 1994-1997 351W blocks with factory roller cam
- Will also fit 1969-1993 non-roller cam 351W blocks when used with hydraulic roller lifters
- Requires upgraded valve springs
- Valve spring requirements: 120 lbs valve seat pressure minimum 295 lbs open
- On EFI engines, performance camshafts work only with mass air induction systems. Will not work with Explorer EEC-V EFI or speed density EFI systems
- Also fits 1994-97 351W with factory roller cam when used with mass air EFI
- Stock 5.0L HO cam advertised specs are 266/266 duration, 0.444"/0.444" lift
- Higher stall torque converter recommended for automatic transmission
| PART NUMBER | ENGINE | ROCKER RATIO |
INTAKE EVENTS (0.050") |
EXHAUST EVENTS (0.050") |
DURATION (SAE) |
LIFT (INCHES) |
LOBE CENTER |
|||||
| OPEN | CLOSE | OPEN | CLOSE | INT. | EXH. | LOBE | VALVE | INT. | EXH. | |||
|
M-6250-B303* (1)(2)(3)(6) |
1985 and Later 302 Roller Cam | 1.60 | 5 BTC | 39 ABC | 49 BBC | 5 BTC | 284 | 284 | .300 I | .480 I | 107 | 117 |
| 224 | 224 | .300E | .480 E | |||||||||
|
M-6250-E303 (1)(2)(3)(6) |
1985 and Later 302 Roller Cam | 1.60 | 0 BTC | 40 ABC | 40 BBC | 0 BTC | 282 | 282 | .311 I | .498 I | 110 | 110 |
| 220 | 220 | .311E | .498 E | |||||||||
|
M-6250-F303* (1)(2)(3)(4) (6)(7) |
1985 and Later 302 Roller Cam | 1.60 | 4 BTC | 42 ABC | 52 BBC | 6 BTC | 288 | 288 | .320 I | .512 I | 109 | 119 |
| 226 | 226 | .320E | .512 E | |||||||||
|
M-6250-X303* (1)(2)(3)(4) (6)(8) |
1985 and Later 302 Roller Cam | 1.60 | 5 BTC | 39 ABC | 49 BBC | 5 BTC | 286 | 286 | .339 I | .542 I | 107 | 117 |
| 224 | 224 | .339E | .542 E | |||||||||
NOTE: Camshaft intake and exhaust valve events are measured at 0.050" tappet lift. The duration figures in the shaded area are taken at 0.050" tappet lift. This is useful to check the cam with a degree wheel during installation. The solid color is advertised duration. For comparison purposes, add intake and exhaust lobe centers and divide by 2 to calculate "camshaft centerline" specification for Ford Performance camshafts.
NOTES: (1) On EFI engines, performance camshafts work only with mass air induction systems. Will not work with Explorer EEC-V EFI. (2) Also fits 1994-97 351W with factory roller cam when used with mass air EFI. (3) Stock 5.0L HO cam advertised specs are 266/266 duration, 0.444"/0.444" lift. (4) May require piston modification for piston-to-valve clearance. Valve clearance should be checked. (5) May require longer pushrods. (6) Hi-Stall torque converter recommended for automatic trans. (7) Great for superchargers. Manual transmission recommended. (8) Good torque and power up to 6200 RPM. Manual transmission recommended.
WARNING: This part is designed and intended for competition use only. It should not be installed on a vehicle that is driven on public roads and highways. Installation of this part on a vehicle driven on public roads and highways is likely to violate U.S. and Canadian laws and regulations relating to motor vehicle emissions.
Technical Specifications
| Brand | : | |
| Country of origin | : | United States |
| Emission type | : | Competition Only |
| UPC | : | 756122625408 |
| Warranty | : | Not Available |
| Instruction sheet | : | Click Here |
Return Policy
Ford or the dealer (where applicable) will accept returns or exchanges of applicable Motorcraft, Ford Parts, Omnicraft, Ford Accessories, Lincoln Accessories and Ford Performance Parts within 30 days of your receipt. Once you have initiated a return, you must return the part(s) within 14 calendar days. Electronics, wheels, bedcaps and custom-painted parts cannot be returned at any time for any reason.
All returns and exchanges must be returned to Ford (for orders shipped directly to you) or the dealer (for orders picked up from the dealer) solely at your expense, except in the case of Ford or dealer error. Returned items must be in the original box, in new, non-installed, resalable condition, with all instructions and hardware, and in the condition it was received. If all of these conditions are not met, it is at discretion of Ford or the dealer (where applicable) to accept the return. Shipping charges are non-refundable.
If you opt not to provide a VIN(s), you are solely responsible for making sure the accessories you have ordered are compatible with your vehicle.
Attempting to return any parts or assemblies that have been tampered with in a manner that affects the re-salability and/or safety of the part(s) is prosecutable under the law, and these parts and assemblies are not eligible for return credit, refund and/or exchange.
If you believe a product sold by Ford has a condition or defect that might make it unsafe, please report this safety concern immediately by using the chat feature on the Site or by calling 1-844-589-0060.
About This Product
The legendary X303 cam developed by Ford Performance for the 5.0L Fox-body Mustang. This cam provides a noticeable power improvement and lumpy idle while maintaining good driveability with a manual transmission. Works well with carburetors or mass air fuel injection.
- Fits 1985 and later 302 roller cam blocks
- Will also fit 1963-1984 non-roller cam 289-302 blocks when used with hydraulic roller lifters
- Will also fit 1994-1997 351W blocks with factory roller cam
- Will also fit 1969-1993 non-roller cam 351W blocks when used with hydraulic roller lifters
- Requires upgraded valve springs
- Valve spring requirements: 120 lbs valve seat pressure minimum 295 lbs open
- On EFI engines, performance camshafts work only with mass air induction systems. Will not work with Explorer EEC-V EFI or speed density EFI systems
- Also fits 1994-97 351W with factory roller cam when used with mass air EFI
- Stock 5.0L HO cam advertised specs are 266/266 duration, 0.444"/0.444" lift
- Higher stall torque converter recommended for automatic transmission
| PART NUMBER | ENGINE | ROCKER RATIO |
INTAKE EVENTS (0.050") |
EXHAUST EVENTS (0.050") |
DURATION (SAE) |
LIFT (INCHES) |
LOBE CENTER |
|||||
| OPEN | CLOSE | OPEN | CLOSE | INT. | EXH. | LOBE | VALVE | INT. | EXH. | |||
|
M-6250-B303* (1)(2)(3)(6) |
1985 and Later 302 Roller Cam | 1.60 | 5 BTC | 39 ABC | 49 BBC | 5 BTC | 284 | 284 | .300 I | .480 I | 107 | 117 |
| 224 | 224 | .300E | .480 E | |||||||||
|
M-6250-E303 (1)(2)(3)(6) |
1985 and Later 302 Roller Cam | 1.60 | 0 BTC | 40 ABC | 40 BBC | 0 BTC | 282 | 282 | .311 I | .498 I | 110 | 110 |
| 220 | 220 | .311E | .498 E | |||||||||
|
M-6250-F303* (1)(2)(3)(4) (6)(7) |
1985 and Later 302 Roller Cam | 1.60 | 4 BTC | 42 ABC | 52 BBC | 6 BTC | 288 | 288 | .320 I | .512 I | 109 | 119 |
| 226 | 226 | .320E | .512 E | |||||||||
|
M-6250-X303* (1)(2)(3)(4) (6)(8) |
1985 and Later 302 Roller Cam | 1.60 | 5 BTC | 39 ABC | 49 BBC | 5 BTC | 286 | 286 | .339 I | .542 I | 107 | 117 |
| 224 | 224 | .339E | .542 E | |||||||||
NOTE: Camshaft intake and exhaust valve events are measured at 0.050" tappet lift. The duration figures in the shaded area are taken at 0.050" tappet lift. This is useful to check the cam with a degree wheel during installation. The solid color is advertised duration. For comparison purposes, add intake and exhaust lobe centers and divide by 2 to calculate "camshaft centerline" specification for Ford Performance camshafts.
NOTES: (1) On EFI engines, performance camshafts work only with mass air induction systems. Will not work with Explorer EEC-V EFI. (2) Also fits 1994-97 351W with factory roller cam when used with mass air EFI. (3) Stock 5.0L HO cam advertised specs are 266/266 duration, 0.444"/0.444" lift. (4) May require piston modification for piston-to-valve clearance. Valve clearance should be checked. (5) May require longer pushrods. (6) Hi-Stall torque converter recommended for automatic trans. (7) Great for superchargers. Manual transmission recommended. (8) Good torque and power up to 6200 RPM. Manual transmission recommended.
WARNING: This part is designed and intended for competition use only. It should not be installed on a vehicle that is driven on public roads and highways. Installation of this part on a vehicle driven on public roads and highways is likely to violate U.S. and Canadian laws and regulations relating to motor vehicle emissions.
Technical Specifications
| Brand | : | |
| Country of origin | : | United States |
| Emission type | : | Competition Only |
| UPC | : | 756122625408 |
| Warranty | : | Not Available |
| Instruction sheet | : | Click Here |
Return Policy
Ford or the dealer (where applicable) will accept returns or exchanges of applicable Motorcraft, Ford Parts, Omnicraft, Ford Accessories, Lincoln Accessories and Ford Performance Parts within 30 days of your receipt. Once you have initiated a return, you must return the part(s) within 14 calendar days. Electronics, wheels, bedcaps and custom-painted parts cannot be returned at any time for any reason.
All returns and exchanges must be returned to Ford (for orders shipped directly to you) or the dealer (for orders picked up from the dealer) solely at your expense, except in the case of Ford or dealer error. Returned items must be in the original box, in new, non-installed, resalable condition, with all instructions and hardware, and in the condition it was received. If all of these conditions are not met, it is at discretion of Ford or the dealer (where applicable) to accept the return. Shipping charges are non-refundable.
If you opt not to provide a VIN(s), you are solely responsible for making sure the accessories you have ordered are compatible with your vehicle.
Attempting to return any parts or assemblies that have been tampered with in a manner that affects the re-salability and/or safety of the part(s) is prosecutable under the law, and these parts and assemblies are not eligible for return credit, refund and/or exchange.
If you believe a product sold by Ford has a condition or defect that might make it unsafe, please report this safety concern immediately by using the chat feature on the Site or by calling 1-844-589-0060.