Forged Small Block Chevy Rotating Assembly, 421 .283 Dome, 400 Mains, 6 Rod

							                        

                                                        
Speedway introduces forged rotating assemblies, with an optional balance job. Includes new 2-pc rear main seal crank, rods and pistons. Cranks are new so they use standard size bearings. All Scat 4340 cranks are 2-piece rear main seal, internally balanced and weigh approximately 51-55 lbs. 
All balancing is done with our state-of-the-art Hines balancer by race  mechanics with over 30 years of experience!  A kit purchased with the  optional balance job will ship in 24-48 hours. These rotating assembly engine rebuild kits  may require additional charges for heavy metal.
If you are going to run this crank in a sprint car motor, you must  have the crank flange turned down prior to balancing the crank to allow  it to go through the motor plate.
NOTE: Piston rings are not included and must be purchased separately. Use Style C rings.
Kits feature: 
Scat 4340 Forged Steel Crankshaft    
Standard size journals
Straight shot and chamfered oil holes
Nitride hardened and shot peened
Lightening holes in all rod throws
Large radius on all journals
KB Signature Series Forged Pistons 
2618 aluminum alloy construction
T-6 heat treated 
4.000" bore pistons available in standard, .030, .040, or .060 sizes
4.125" bore pistons available in .030 or .040 sizes
Speedway 4340 H-beam Connecting Rods
Full floating pin in silicon bronze bushing
Precision bolt bushings to positively locate cap
5.7" lengths
622 grams
Weight matched set of 8 rods
King HP Series Main & Rod Bearings
0.015" thick top layer for superior macro particle embedability and conformability
40 Vickers hardness to resist overlay migration and extrusion
450°F heat threshold for superior protection against friction and overheating
Mains are 3/4 grooved for improved oiling to the rod journals
Bi-metal aluminum silicon alloy featuring fine micro-bore finish
Chevy 350: 4.000" bore x 3.48" stroke
                                                    

						                        

							                        

                                                        
Speedway introduces forged rotating assemblies, with an optional  balance job. Includes new 2-pc rear main seal crank, rods and pistons.  Cranks are new so they use standard size bearings.
All  Scat 4340 cranks are 2-piece rear main seal, internally balanced and  weigh approximately 51-55 lbs.  All  balancing is done with our state-of-the-art Hines balancer by race   mechanics with over 30 years of experience!  A kit purchased with the   optional balance job will ship in 24-48 hours. These rotating assembly engine rebuild kits   may require additional charges for heavy metal.
If you are going  to run this crank in a sprint car motor, you must  have the crank  flange turned down prior to balancing the crank to allow  it to go  through the motor plate.
Chevy 434: 4.125" bore x 4.00" stroke
NOTE: Piston rings are not included and must be purchased separately. Use Style C rings. 
                                                    

						                        

							                        

                                                        
Speedway introduces forged rotating assemblies, with an optional  balance job. Includes new 2-pc rear main seal crank, rods and pistons.  Cranks are new so they use standard size bearings.  
All  Scat 4340 cranks are 2-piece rear main seal, internally balanced and  weigh approximately 51-55 lbs.  All  balancing is done with our state-of-the-art Hines balancer by race   mechanics with over 30 years of experience!  A kit purchased with the   optional balance job will ship in 24-48 hours. These rotating assembly engine rebuild kits   may require additional charges for heavy metal.
If you are going  to run this crank in a sprint car motor, you must  have the crank  flange turned down prior to balancing the crank to allow  it to go  through the motor plate. 
Chevy 350: 4.000" bore x 3.48" stroke
NOTE: Piston rings are not included and must be purchased separately. Use Style C rings. 
                                                    

						                        

							                        

                                                        
Speedway introduces forged rotating assemblies, with an optional  balance job. Includes new 2-pc rear main seal crank, rods and pistons.  Cranks are new so they use standard size bearings. 
All  Scat 4340 cranks are 2-piece rear main seal, internally balanced and  weigh approximately 51-55 lbs.  All  balancing is done with our state-of-the-art Hines balancer by race   mechanics with over 30 years of experience!  A kit purchased with the   optional balance job will ship in 24-48 hours. These rotating assembly engine rebuild kits   may require additional charges for heavy metal.
If you are going  to run this crank in a sprint car motor, you must  have the crank  flange turned down prior to balancing the crank to allow  it to go  through the motor plate. 
Chevy 383: 4.000" bore x 3.75" stroke
NOTE: Piston rings are not included and must be purchased separately. Use Style C rings. 
                                                    

						                        

							                        

                                                        
Speedway introduces forged rotating assemblies, with an optional  balance job. Includes new 2-pc rear main seal crank, rods and pistons.  Cranks are new so they use standard size bearings.  
All  Scat 4340 cranks are 2-piece rear main seal, internally balanced and  weigh approximately 51-55 lbs.  All  balancing is done with our state-of-the-art Hines balancer by race   mechanics with over 30 years of experience!  A kit purchased with the   optional balance job will ship in 24-48 hours. These rotating assembly engine rebuild kits   may require additional charges for heavy metal.
If you are going  to run this crank in a sprint car motor, you must  have the crank  flange turned down prior to balancing the crank to allow  it to go  through the motor plate.
Chevy 434: 4.125" bore x 4.00" stroke
NOTE: Piston rings are not included and must be purchased separately. Use Style C rings. 
                                                    

						                        

							                        

                                                        
Speedway introduces forged rotating assemblies, with an optional  balance job. Includes new 2-pc rear main seal crank, rods and pistons.  Cranks are new so they use standard size bearings.
All  Scat 4340 cranks are 2-piece rear main seal, internally balanced and  weigh approximately 51-55 lbs.  All  balancing is done with our state-of-the-art Hines balancer by race   mechanics with over 30 years of experience!  A kit purchased with the   optional balance job will ship in 24-48 hours. These rotating assembly engine rebuild kits   may require additional charges for heavy metal.
If you are going  to run this crank in a sprint car motor, you must  have the crank  flange turned down prior to balancing the crank to allow  it to go  through the motor plate. 
Chevy 383: 4.000" bore x 3.75" stroke
NOTE: Piston rings are not included and must be purchased separately. Use Style C rings. 
                                                    

						                        

							                        

                                                        
Speedway introduces forged rotating assemblies, with an optional  balance job. Includes new 2-pc rear main seal crank, rods and pistons.  Cranks are new so they use standard size bearings.  
All  Scat 4340 cranks are 2-piece rear main seal, internally balanced and  weigh approximately 51-55 lbs.  All  balancing is done with our state-of-the-art Hines balancer by race   mechanics with over 30 years of experience!  A kit purchased with the   optional balance job will ship in 24-48 hours. These rotating assembly engine rebuild kits   may require additional charges for heavy metal.
If you are going  to run this crank in a sprint car motor, you must  have the crank  flange turned down prior to balancing the crank to allow  it to go  through the motor plate. 
Chevy 383: 4.000" bore x 3.75" stroke
NOTE: Piston rings are not included and must be purchased separately. Use Style C rings. 
                                                    

						                        

							                        

                                                        
Speedway introduces forged rotating assemblies, with an optional  balance job. Includes new 2-pc rear main seal crank, rods and pistons.  Cranks are new so they use standard size bearings.  
All  Scat 4340 cranks are 2-piece rear main seal, internally balanced and  weigh approximately 51-55 lbs.  All  balancing is done with our state-of-the-art Hines balancer by race   mechanics with over 30 years of experience!  A kit purchased with the   optional balance job will ship in 24-48 hours. These rotating assembly engine rebuild kits   may require additional charges for heavy metal.
If you are going  to run this crank in a sprint car motor, you must  have the crank  flange turned down prior to balancing the crank to allow  it to go  through the motor plate. 
Chevy 383: 4.000" bore x 3.75" stroke
NOTE: Piston rings are not included and must be purchased separately. Use Style C rings. 
                                                    

						                        

							                        

                                                        
Speedway introduces forged rotating assemblies, with an optional  balance job. Includes new 2-pc rear main seal crank, rods and pistons.  Cranks are new so they use standard size bearings. 
All  Scat 4340 cranks are 2-piece rear main seal, internally balanced and  weigh approximately 51-55 lbs.  All  balancing is done with our state-of-the-art Hines balancer by race   mechanics with over 30 years of experience!  A kit purchased with the   optional balance job will ship in 24-48 hours. These rotating assembly engine rebuild kits   may require additional charges for heavy metal.
If you are going  to run this crank in a sprint car motor, you must  have the crank  flange turned down prior to balancing the crank to allow  it to go  through the motor plate.
Chevy 434: 4.125" bore x 4.00" stroke
NOTE: Piston rings are not included and must be purchased separately. Use Style C rings. 
                                                    

						                        

							                        

                                                        
Speedway introduces forged rotating assemblies, with an optional  balance job. Includes new 2-pc rear main seal crank, rods and pistons.  Cranks are new so they use standard size bearings.  
All  Scat 4340 cranks are 2-piece rear main seal, internally balanced and  weigh approximately 51-55 lbs.  All  balancing is done with our state-of-the-art Hines balancer by race   mechanics with over 30 years of experience!  A kit purchased with the   optional balance job will ship in 24-48 hours. These rotating assembly engine rebuild kits   may require additional charges for heavy metal.
If you are going  to run this crank in a sprint car motor, you must  have the crank  flange turned down prior to balancing the crank to allow  it to go  through the motor plate. 
Chevy 383: 4.000" bore x 3.75" stroke
NOTE: Piston rings are not included and must be purchased separately. Use Style C rings. 
                                                    

						                        

							                        

                                                        
Speedway introduces forged rotating assemblies, with an optional  balance job. Includes new 2-pc rear main seal crank, rods and pistons.  Cranks are new so they use standard size bearings. 
All  Scat 4340 cranks are 2-piece rear main seal, internally balanced and  weigh approximately 51-55 lbs.  All  balancing is done with our state-of-the-art "hines" balancer by race   mechanics with over 30 years of experience!  A kit purchased with the   optional balance job will ship in 24-48 hours. These rotating assembly engine rebuild kits   may require additional charges for heavy metal.
If you are going  to run this crank in a sprint car motor, you must  have the crank  flange turned down prior to balancing the crank to allow  it to go  through the motor plate.
Chevy 434: 4.125" bore x 4.00" stroke
NOTE: Piston rings are not included and must be purchased separately. Use Style C rings. 
                                                    

						                        

							                        

                                                        All balancing is done with our state-of-the-art "hines" balancer by race mechanics with over 30 years of experience!  A kit purchased with the optional balance job will ship in 24-48 hours. These rotating assemblies may require additional charges for heavy metal.

                                                    

						                        

							                        

                                                        
Speedway introduces forged rotating assemblies, with an optional  balance job. Includes new 2-pc rear main seal crank, rods and pistons.  Cranks are new so they use standard size bearings.  
All  Scat 4340 cranks are 2-piece rear main seal, internally balanced and  weigh approximately 51-55 lbs.  All  balancing is done with our state-of-the-art Hines balancer by race   mechanics with over 30 years of experience!  A kit purchased with the   optional balance job will ship in 24-48 hours. These rotating assembly engine rebuild kits   may require additional charges for heavy metal.
If you are going  to run this crank in a sprint car motor, you must  have the crank  flange turned down prior to balancing the crank to allow  it to go  through the motor plate. 
NOTE: A balance rotating assembly option is currently not offered for this package but the proper balancing service can be determined after your order is placed.  If you would like our balancing option service for 395 and 421 engine builds, please call 1-800-979-0122 when placing order. 
NOTE: Piston rings are not included and must be purchased separately. Use Style C rings. 
                                                    

						                        

							                        

                                                        
Speedway introduces forged rotating assemblies, with an optional  balance job. Includes new 2-pc rear main seal crank, rods and pistons.  Cranks are new so they use standard size bearings.
All  Scat 4340 cranks are 2-piece rear main seal, internally balanced and  weigh approximately 51-55 lbs.  All  balancing is done with our state-of-the-art Hines balancer by race   mechanics with over 30 years of experience!  A kit purchased with the   optional balance job will ship in 24-48 hours. These rotating assembly engine rebuild kits  may require additional charges for heavy metal.
If you are going  to run this crank in a sprint car motor, you must  have the crank  flange turned down prior to balancing the crank to allow  it to go  through the motor plate.  
NOTE: A balance rotating assembly option is currently not offered  for this package but the proper balancing service can be determined  after your order is placed.  If you would like our balancing option  service for 395 and 421 engine builds, please call 1-800-979-0122 when  placing order.
NOTE: Piston rings are not included and must be purchased separately. Use Style C rings. 
                                                    

						                        

							                        

                                                        
Speedway introduces forged rotating assemblies, with an optional  balance job. Includes new 2-pc rear main seal crank, rods and pistons.  Cranks are new so they use standard size bearings.
All  Scat 4340 cranks are 2-piece rear main seal, internally balanced and  weigh approximately 51-55 lbs.  All  balancing is done with our state-of-the-art Hines balancer by race   mechanics with over 30 years of experience!  A kit purchased with the   optional balance job will ship in 24-48 hours. These rotating assembly engine rebuild kits   may require additional charges for heavy metal.
If you are going  to run this crank in a sprint car motor, you must  have the crank  flange turned down prior to balancing the crank to allow  it to go  through the motor plate.  
NOTE: A balance rotating assembly option is currently not offered  for this package but the proper balancing service can be determined  after your order is placed.  If you would like our balancing option  service for 395 and 421 engine builds, please call 1-800-979-0122 when  placing order.
NOTE: Piston rings are not included and must be purchased separately. Use Style C rings. 
                                                    

						                        

							                        

                                                        
Speedway introduces forged rotating assemblies, with an optional  balance job. Includes new 2-pc rear main seal crank, rods and pistons.  Cranks are new so they use standard size bearings. 
All  Scat 4340 cranks are 2-piece rear main seal, internally balanced and  weigh approximately 51-55 lbs.  All  balancing is done with our state-of-the-art Hines balancer by race   mechanics with over 30 years of experience!  A kit purchased with the   optional balance job will ship in 24-48 hours. These rotating assembly engine rebuild kits   may require additional charges for heavy metal.
If you are going  to run this crank in a sprint car motor, you must  have the crank  flange turned down prior to balancing the crank to allow  it to go  through the motor plate.  
NOTE: A balance rotating assembly option is currently not offered   for this package but the proper balancing service can be determined   after your order is placed.  If you would like our balancing option   service for 395 and 421 engine builds, please call 1-800-979-0122 when   placing order.
NOTE: Piston rings are not included and must be purchased separately. Use Style C rings. 
                                                    

						                        

							                        

                                                        
Speedway introduces forged rotating assemblies, with an optional  balance job. Includes new 2-pc rear main seal crank, rods and pistons.  Cranks are new so they use standard size bearings.
All  Scat 4340 cranks are 2-piece rear main seal, internally balanced and  weigh approximately 51-55 lbs.  All  balancing is done with our state-of-the-art Hines balancer by race   mechanics with over 30 years of experience!  A kit purchased with the   optional balance job will ship in 24-48 hours. These rotating assembly engine rebuild kits   may require additional charges for heavy metal.
If you are going  to run this crank in a sprint car motor, you must  have the crank  flange turned down prior to balancing the crank to allow  it to go  through the motor plate.  
NOTE: A balance rotating assembly option is currently not offered   for this package but the proper balancing service can be determined   after your order is placed.  If you would like our balancing option   service for 395 and 421 engine builds, please call 1-800-979-0122 when   placing order.
NOTE: Piston rings are not included and must be purchased separately. Use Style C rings.