331 347 408 Stroker Rotating Kits

HMS has a complete line of 331 347 and 408 Rotating Assemblies that can suit every need.
 We offer a variety of crankshaft and rod designs for the small block Ford – just tell us what you
need and we will put a package together for you.

331 Econo Demon
 

Our 331 Econo Demon rotating assembly is one of our most popular 302 based stroker
 for the budget minded. This is perfectly suited for uses from street to week end track
 days. If you are building a mild horsepower small block Ford (up 425 HP), this 331
 rotating kit is perfect for you!

Assembly Includes- 
   New RPM Series Cast Steel Crank 3.25" stroke
   New RPM 5.4" 5140 forged I-Beam rods w/ ARP bolts
   Probe 2816 Forged Pistons with fitted Pins
   Clevite or FM Rod and Main Bearings
   Performance Moly Rings

Options-

   .030 or .040 bore size
   Flat top, Dish or Dome piston configuration - Compression ratios from 8.0 to 12.25
   Balanced before shipment 28 or 50 oz . Add $155.00

                              retail price $1149.90

                            Our Price: $1075.95

                       Order Toll Free at 866-997-3991
 

347 Econo Demon
 

Our 347 Econo Demon rotating assembly is great for those looking to get the most
 cubic inches out of a 302! Designed for the budget minded, this is perfectly suited
 for uses from street to week end track days. If you are building a mild horsepower
 small block Ford (up 425 HP), this 347 rotating kit is perfect for you!

Assembly Includes- 
   New RPM Series Cast Steel Crank 3.40" stroke
   New RPM 5.315" 5140 forged I-Beam rods w/ ARP bolts
   Probe 2816 Forged Pistons with fitted Pins
   Clevite or FM Rod and Main Bearings
   Performance Moly Rings

Options-

   .030 or .040 bore size
   Flat top, Dish or Dome piston configuration - Compression ratios from 8.0 to 12.25
   Balanced before shipment 28 or 50 oz . Add $155.00

                               retail price $1149.90

                             Our Price: $1075.95

                     Order Toll Free at 866-997-3991
 

408 Econo Demon
 

Our 408 Econo Demon rotating assembly is one of our most popular 351 based stroker
 for the budget minded. This is perfectly suited for uses from street to week end track
 days. If you are building a mild horsepower small block Ford (up 475 HP), this 408
 rotating kit is perfect for you!

Assembly Includes- 
   New RPM Series Cast Steel Crank 4.00" stroke
   New RPM 6.200" 5140 forged I-Beam rods w/ ARP bolts
   Probe 2816 Forged Pistons with fitted Pins
   Clevite or FM Rod and Main Bearings
   Performance Moly Rings

Options-

   .030 or .040 bore size
   Flat top, Dish or Dome piston configuration - Compression ratios from 8.0 to 12.25
   Balanced before shipment 28 oz. Add $155.00

                               retail price $1245.80

                             Our Price: $1150.95

                       Order Toll Free at 866-997-3991
 

331 Street Demon
 

Our 331 Street Demon rotating assembly is one of our most popular 302 based
 stroker for the mild Nos / force induction crowd! This is perfectly suited for uses
 from street to week end track days. If you are building a mild horsepower small
 block Ford (up 485* HP), this 331 rotating kit is perfect for you!

Assembly Includes- 
   New SCAT 9000 Series Cast Steel Crank 3.25" stroke
   New SCAT 5.4" 4340 forged I-Beam rods w/ ARP Cap Screw bolts
   Probe 2816 Forged Pistons with fitted Pins
   Clevite or FM Rod and Main Bearings
   Performance Moly Rings

Options-

   .030 or .040 bore size
   Flat top, Dish or Dome piston configuration - Compression ratios from 8.0 to 12.25
   Balanced before shipment 28 or 50 oz . Add $155.00
   Upgrade to forged H-Beam rods  Add  $195.00

                             retail price $1296.50

                          Our Price: $1195.95

                     Order Toll Free at 866-997-3991
 

347 Street Demon
 

Our 347 Street Demon rotating assembly is great for those looking to get the
 most cubic inches out of a 302 and for the mild Nos / force induction crowd!
 This is perfectly suited for uses from street to week end track days. If you
 are building a mild horsepower small block Ford (up 485* HP), this 347
 rotating kit is perfect for you!

Assembly Includes- 
   New SCAT 9000 Series Cast Steel Crank 3.40" stroke
   New SCAT 5.315" 4340 forged I-Beam rods w/ ARP Cap Screw bolts
   Probe 2816 Forged Pistons with fitted Pins
   Clevite or FM Rod and Main Bearings
   Performance Moly Rings

Options-

   .030 or .040 bore size
   Flat top, Dish or Dome piston configuration - Compression ratios from 8.0 to 12.25
   Balanced before shipment 28 or 50 oz . Add $155.00
   Upgrade to forged H-Beam rods   Add  $195.00

                            retail price $1296.50

                          Our Price: $1195.95

                     Order Toll Free at 866-997-3991
 

408 Street Demon
 

Our 408 Street Demon rotating assembly is one of our most popular 351 based stroker
 for the budget minded. This is perfectly suited for uses from street to week end track
 days. If you are building a mild horsepower small block Ford (up 525* HP), this 408
 rotating kit is perfect for you!

Assembly Includes- 
   New SCAT 9000 Series Cast Steel Crank 4.00" stroke
   New SCAT  6.200" 4340 forged I-Beam rods w/ ARP bolts
   Probe Forged Pistons with fitted Pins
   Clevite or FM Rod and Main Bearings
   Performance Moly Rings

Options-

   .030 or .040 bore size
   Flat top, Dish or Dome piston configuration - Compression ratios from 8.5 to 12.25
   Balanced before shipment 28 Oz. Add $155.00
   Upgrade to forged H-Beam rods   Add  $195.00

                             retail price $1356.50

                          Our Price: $1205.95

                   Order Toll Free at 866-997-3991
 

331 Race Demon
 

Our 331 Race Demon rotating assembly is one of our most popular 302 based stroker
 for the Big Nos / force induction crowd! This is perfectly suited for uses from street to
 all out racing! If you are building a big horsepower small block Ford (up to 800 HP),
 this 331 rotating kit is perfect for you!

Assembly Includes- 
   New SCAT 4340 Forged Steel Crank 3.25" stroke
   New SCAT 5.4" 4340 forged H-Beam rods w/ ARP Cap Screw bolts
   Probe 2816 Forged Pistons with fitted Pins
   Clevite or FM Rod and Main Bearings
   Performance Moly Rings

Options-

   .030  .040 or .060 bore size
   Flat top, Dish or Dome piston configuration - Compression ratios from 8.0 to 12.25
   Upgrade to Internal balance 4340 forged crank Add $150.00
   Balanced before shipment Internal Balance Add $225.00
   Balanced before shipment 28 oz. Add $155.00
  

                              retail Price $1685.50

                            Our Price: $1495.95

                      Order Toll Free at 866-997-3991
 

347 Race Demon
 

Our 347 Race Demon rotating assembly is great for those looking to get the most
 cubic inches out of a 302 and for the Big Nos / force induction crowd! This is perfectly
 suited for uses from street to all out racing. If you are building a big horsepower
 small block Ford (up 800 HP), this 347 rotating kit is perfect for you!

Assembly Includes- 
   New SCAT 4340 Forged Steel Crank 3.40" stroke
   New SCAT 5.4" 4340 forged H-Beam rods w/ ARP Cap Screw bolts
   Probe 2816 Forged Pistons with fitted Pins
   Clevite or FM Rod and Main Bearings
   Performance Moly Rings

Options-

   .030  .040 or .060 bore size
   Flat top, Dish or Dome piston configuration - Compression ratios from 8.0 to 12.25
   Upgrade to Internal balance 4340 forged crank  Add  $150.00
   Balanced before shipment Internal Balance Add  $225.00
   Balanced before shipment 28 oz. Add  $155.00
  

                                retail Price $1685.50

                              Our Price: $1495.95

                     Order Toll Free at 866-997-3991

 

408 Race Demon
 

 Our 408 Race Demon rotating assembly is one of our most popular 351 based stroker
  for the big HP minded. This is perfectly suited for uses from street to all out racing!
  If you are building a mild horsepower small block Ford (up 800 HP), this 408
  rotating kit is perfect for you!

Assembly Includes- 
   New SCAT 4340 Forged Steel Crank 4.00" stroke
    New SCAT 6.250" 4340 forged H-Beam rods w/ ARP Cap Screw bolts
    Probe 2816 Forged Pistons with fitted Pins
    Clevite or FM Rod and Main Bearings
    Performance Moly Rings

Options-

   .030  .040 or .060 bore size
   Flat top, Dish or Dome piston configuration - Compression ratios from 8.5 to 13.5
   Upgrade Custom Pistons from Ross, JE and CP Add $200.00 and up
   Upgrade to Internal balance 4340 forged crank Add  $150.00
   Balanced before shipment Internal Balance Add  $225.00
   Balanced before shipment 28 Oz.  Add  $155.00

                              retail Price $1985.50

                            Our Price: $1695.95

                      Order Toll Free at 866-997-3991
 

All of our rotating kits prices shown are non balanced. We can balance any kit for your
application..... 28oz, 50oz or internal for an additional charge. External balancing starts at $155.00.