*New 4340 Forged 3.543 stroke Cobra Crankshaft w/micro polished journals at no extra charge

*New 4340 5.933 MMR 800HP H-beam Rods w/ARP rod bolts ( These rods are shotpeened, magnafluxed and weight matched to bring you the finest H-beam rod available for your 4.6)

*New Forged Manley pistons  (High or low compression)

*Speed Pro file fit rings (precision file fit to your application, nitrous, blower, turbo or N/A)

* Clevite tri-metal Rod and ACL Performance Main bearings

*Complete Pro Assembly and Balancing for the smoothest, highest revving shortblock available, Pre-Lubricated with Royal Purple Assembly Lube and spin tested. Lastly 3 technicians sign off on your new engine prior to packaging and crating.

ARP Headstuds +$269.99

MMR windage tray and hardware kit (+15HP) + 129.99

*Due to the custom nature of MMR shortblocks ALL customers paying with a credit card
 will be billed when the order is placed (prior to engine assembly and shipping),
 All MMR shortblocks are non-refundable regardless if the item has shipped or not.

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*New 4340 Forged 3.543 stroke Cobra Crankshaft w/micro polished journals at no extra charge

*New 4340 5.933 Manley H-beam Rods w/ARP rod bolts ( These US made rods are shotpeened, magnafluxed and weight matched to bring you the finest H-beam rod available for your 4.6)

*New Forged Manley or Diamond pistons  (High or low compression)

*Speed Pro file fit rings (precision file fit to your application, nitrous, blower, turbo or N/A)

*Speed Pro/Federal Mogul or Clevite Tri-metal Rod and ACL Performance Main bearings

*Complete Pro Assembly and Balancing for the smoothest, highest revving shortblock available,Pre-Lubricated with Royal Purple Assembly Lube and spin tested. Lastly 3 technicians sign off on your new engine prior to packaging and crating.

ARP Headstuds +$269.99

MMR windage tray and hardware kit (+15HP) + 129.99

*Due to the custom nature of MMR shortblocks ALL customers paying with a credit card
 will be billed when the order is placed (prior to engine assembly and shipping),
 All MMR shortblocks are non-refundable regardless if the item has shipped or not.

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call to order

This STROKER shortblock adds .4 liters to your Mustang engine without anyone knowing, all factory parts bolt right on! Great for blowers, turbo or Nitrous. With no other changes this Stroker shortblock will add up to 40HP and 40ft lbs of torque! This shortblock can support up to 950 Rear wheel horsepower!!

*Brand New Cast Iron 2004 Cobra Block, torque plate bored and honed
*New 4340 Forged 3.750 stroke Crankshaft w/micro polished journals at no extra charge
*New 4340 MANLEY Forged H-beam Rods ( These US made rods are shotpeened, magnafluxed and weight matched to bring you the finest H-beam rod available for your 5.0 Stroker)
*New 2618 Alloy MMR/ Manley or Diamond pistons  Bore size  (High or low compression)
*Speed Pro file fit rings (precision file fit to your application, nitrous, blower, turbo or N/A)
*Speed Pro/Federal Mogul or Clevite Tri-metal Rod and ACL Performance Main bearings
*Complete Pro Assembly and Balancing for the smoothest, highest revving shortblock available, Pre-Lubricated with Royal Purple Assembly Lube and spin tested. Lastly 3 technicians sign off on your new engine prior to packaging and crating.

Teflon Coated Piston Skirts now come standard on ALL MMR Stroker engines ($300 value)

ARP Headstuds +$269.99

Upgrade to MMR block side bolts (recommended for 500+ HP) +$44.99

*Due to the custom nature of MMR shortblocks ALL customers paying with a credit card
 will be billed when the order is placed (prior to engine assembly and shipping),
 All MMR shortblocks are non-refundable regardless if the item has shipped or not.

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call to order

*New 4340 Forged 3.543 Cobra Crankshaft, includes additional heat treat w/micro polished journals at no extra charge

*New 4340 5.933 Manley Pro-series Billet Rods w/ARP 2000 Rod bolts( These US made rods are shotpeened, magnafluxed and weight matched to bring you the finest I-beam rod available for your 4.6

*New 2618 Alloy Forged Manley or Diamond pistons  (High or low compression)

*Speed Pro file fit rings (precision file fit to your application, nitrous, blower, turbo or N/A)

*Federal Mogul/Speed Pro Competition series heat treated Rod and Main bearings

*ARP main stud kit for maintaining correct cap location under the hardest of loads

*Complete Pro Assembly and Balancing for the smoothest, highest revving shortblock available, Pre-Lubricated with Royal Purple Assembly Lube and spin tested. Lastly 3 technicians sign off on your new engine prior to packaging and crating.

Shortblock Options:

ARP Headstuds +$269.99

MMR windage tray and hardware kit (+15HP) + 129.99

*Due to the custom nature of MMR shortblocks ALL customers paying with a credit card
 will be billed when the order is placed (prior to engine assembly and shipping),
 All MMR shortblocks are non-refundable regardless if the item has shipped or not.

This STROKER shortblock adds .4 liters to your Mustang engine without anyone knowing, all factory parts bolt right on! Great for blowers, turbo or Nitrous. With no other changes this Stroker shortblock will add up to 40HP and 40ft lbs of torque! This shortblock can support up to 1150 Rear wheel horsepower!!

*Brand New Cast Iron 2004 Cobra Block, torque plate bored and honed
*New 4340  Manley Pro-series Billet Rods w/ARP 2000 Rod bolts( These US made rods are shotpeened, magnafluxed and weight matched to bring you the finest I-beam rod available for your 4.6
*New 4340 Forged 3.750 stroke Crankshaft w/micro polished journals at no extra charge  
*New 2618 Alloy MMR/ Manley or Diamond pistons Bore size  (High or low compression)

*ARP Mainstud kit
*Speed Pro file fit rings (precision file fit to your application, nitrous, blower, turbo or N/A)
*Speed Pro/Federal Mogul Race series Rod and Main bearings
*Complete Pro Assembly and Balancing for the smoothest, highest revving shortblock available, Pre-Lubricated with Royal Purple Assembly Lube and spin tested. Lastly 3 technicians sign off on your new engine prior to packaging and crating.

Teflon Coated Piston Skirts now come standard on ALL MMR Stroker engines ($300 value)

ARP Headstuds +$269.99

MMR windage tray and hardware kit (+15HP) + 129.99

*Due to the custom nature of MMR shortblocks ALL customers paying with a credit card
 will be billed when the order is placed (prior to engine assembly and shipping),
 All MMR shortblocks are non-refundable regardless if the item has shipped or not.

*New 4340 Forged MMR STROKER Crankshaft, includes additional heat treat w/micro polished journals at no extra charge

*New 4340 Manley Pro-series Billet Rods w/ARP 2000 Rod bolts( These US made rods are shotpeened, magnafluxed and weight matched to bring you the finest I-beam rod available for your 4.6

*New Forged MMR/Manley or Diamond Custom pistons 3.700 Bore size  (High or low compression)

*Speed Pro file fit rings (precision file fit to your application, nitrous, blower, turbo or N/A)

*Federal Mogul Competition series heat treated Rod and Main bearings

*ARP main stud kit for maintaining correct cap location under the hardest of loads

*Complete Pro Assembly and Balancing for the smoothest, highest revving shortblock available, Pre-Lubricated with Royal Purple Assembly Lube and spin tested. Lastly 3 technicians sign off on your new engine prior to packaging and crating.

Shortblock Options:

MMR windage tray and hardware kit (+15HP) + 129.99

*Due to the custom nature of MMR shortblocks ALL customers paying with a credit card
 will be billed when the order is placed (prior to engine assembly and shipping),
 All MMR shortblocks are non-refundable regardless if the item has shipped or not.

*Brand New Cast Iron, current production Romeo or Windsor Block, FULL RACE PREP, de-burred and custom Hone for Chrome faced ringset.

*New 4340 3.543 stroke Forged Cobra Crankshaft, FULL RACE PREP- includes additional heat treat w/micro polished journals, shot peened and magnafluxed at no extra charge

*New 4340 5.933 Manley Pro-series Billet Rods ( These US made rods are shotpeened, magnafluxed and weight matched to bring you the finest I-beam rod available for your 4.6), MMR gives the rod a final deep tempering to increase strength up to 300%

*New Ceramic Coated dome and teflon Coated skirt Forged 2618 Manley or Diamond pistons   (High or low compression)

*Total Seal file fit rings with Chrome faced combustion/top ring for ultimate high cylinder pressure sealing(precision file fit to your application, nitrous, blower, turbo or N/A)

*Federal Mogul Competition series heat treated Rod and Main bearings, each bearing is hand deburred at the parting line for perfect fit and oil clearance.

*ARP main stud kit for maintaining correct cap location under the hardest of loads

*Complete Pro Assembly and Balancing for the smoothest, highest revving shortblock available, Pre-Lubricated with Royal Purple Assembly Lube and spin tested. Lastly 3 technicians sign off on your new engine prior to packaging and crating.

ARP Headstuds +$269.99

*Due to the custom nature of MMR shortblocks ALL customers paying with a credit card
 will be billed when the order is placed (prior to engine assembly and shipping),
 All MMR shortblocks are non-refundable regardless if the item has shipped or not.

*NEW Cast Iron 5.4 Block

*New 4340 4.165 Stroke Forged Crankshaft w/micro polished journals at no extra charge

*New MMR 4340 6.658 H-beam Rods

*New Forged Manley pistons, Low compression for Blower/turbo

*Speed Pro file fit rings (precision file fit to your application, nitrous, blower, turbo or N/A)

*Clevite Performance Rod and Main bearings

*Complete Pro Assembly and Balancing for the smoothest, highest revving shortblock available, Pre-Lubricated with Royal Purple Assembly Lube and spin tested. Lastly 3 technicians sign off on your new engine prior to packaging and crating.

ARP Headstuds +$269.99

ARP Mainstuds (recommended for 600+HP) +169.99

*Due to the custom nature of MMR shortblocks ALL customers paying with a credit card
 will be billed when the order is placed (prior to engine assembly and shipping),
 All MMR shortblocks are non-refundable regardless if the item has shipped or not.

*Cast Iron 5.4. Block Block

*New 4340 Forged 4.165 stroke Crankshaft w/micro polished journals at no extra charge

*New 4340 6.658 Manley H-beam Rods ( These US made rods are shotpeened, magnafluxed and weight matched to bring you the finest H-beam rod available for your 5.4

*New Forged Manley pistons  (High or low compression)

*Speed Pro file fit rings (precision file fit to your application, nitrous, blower, turbo or N/A)

*Speed Pro/Federal Mogul Rod and Main bearings

*Complete Pro Assembly and Balancing for the smoothest, highest revving shortblock available, Pre-Lubricated with Royal Purple Assembly Lube and spin tested. Lastly 3 technicians sign off on your new engine prior to packaging and crating.

MMR windage tray and hardware kit (+15HP) + 129.99

*Due to the custom nature of MMR shortblocks ALL customers paying with a credit card
 will be billed when the order is placed (prior to engine assembly and shipping),
 All MMR shortblocks are non-refundable regardless if the item has shipped or not.

*Cast Iron 5.4 Block

*New 4340 Forged 4.165 Crankshaft, includes additional heat treat w/micro polished journals at no extra charge

*New 4340 6.658 Manley Pro-series Billet Rods ( These US made rods are shotpeened, magnafluxed and weight matched to bring you the finest I-beam rod available for your 5.4

*New 2618 Alloy Forged Manley or Diamond pistons   (High or low compression)

*Speed Pro file fit rings (precision file fit to your application, nitrous, blower, turbo or N/A)

*Federal Mogul Competition series heat treated Rod and Main bearings

*ARP main stud kit for maintaining correct cap location under the hardest of loads

*Complete Pro Assembly and Balancing for the smoothest, highest revving shortblock available, Pre-Lubricated with Royal Purple Assembly Lube and spin tested. Lastly 3 technicians sign off on your new engine prior to packaging and crating.

*Due to the custom nature of MMR shortblocks ALL customers paying with a credit card
 will be billed when the order is placed (prior to engine assembly and shipping),
 All MMR shortblocks are non-refundable regardless if the item has shipped or not.

*Cast Iron Block FULL RACE PREP, de-burred and custom Hone for Chrome faced ringset.

*New 4340 4.165 stroke Forged Crankshaft, FULL RACE PREP- includes additional heat treat w/micro polished journals, shot peened and magnafluxed at no extra charge

*New 4340 6.658 Manley Pro-series Billet Rods ( These US made rods are shotpeened, magnafluxed and weight matched to bring you the finest I-beam rod available for your 5.4), MMR gives the rod a final deep tempering to increase strength up to 300%

*New Forged Manley or Diamond 2618 Custom pistons  (High or low compression)

*Total Seal file fit rings with Chrome faced combustion/top ring for ultimate high cylinder pressure sealing(precision file fit to your application, nitrous, blower, turbo or N/A)

*Federal Mogul Competition series heat treated Rod and Main bearings, each bearing is hand deburred at the parting line for perfect fit and oil clearance.

*ARP main stud kit for maintaining correct cap location under the hardest of loads

*Complete Pro Assembly and Balancing for the smoothest, highest revving shortblock available, Pre-Lubricated with Royal Purple Assembly Lube and spin tested. Lastly 3 technicians sign off on your new engine prior to packaging and crating.

*Due to the custom nature of MMR shortblocks ALL customers paying with a credit card
 will be billed when the order is placed (prior to engine assembly and shipping),
 All MMR shortblocks are non-refundable regardless if the item has shipped or not.