SCAT 4340 FORGED 421-427 CRANKSHAFT FOR SBC CHEVY 2pc REAR MAIN SEAL 3.875 STROKE. 350 MAINS INTERNAL BAL. STYLE. TO BE USED WITH 6.00 INCH RODS WITH 2.0 ROD JOURNAL SIZE
4340 FORGED STEEL
This crank doe's not use the common 2.1 rods. This uses the 2.0 rods.
File photo. Actual appearance may vary.
A complete set of HP HIGH PERFORMANCE King rod and main bearings is included with the crankshaft.
The part number for this crankshaft is 4-350-3875-6000-20LW-KIT This is a first line product directly from Scat engine products.
This crankshaft is to used with an INTERNAL flexplate, and damper.
STROKE - 3.875
ROD JOURNAL DIAMETER - 2.000
ROD LENGTH TO BE USED - 6.00 RODS
MAIN JOURNAL DIAMETER - 2.448
Important Note.
This crankshaft must be balanced with your pistons and rods before use. All crankshafts on the market are this way.
If you do not need the engine bearings and wish to order just the crank, please email us and we will gladly create a listing for you at a discounted price for the crank only.
Listed below is an upgrade we consider very beneficial and requested by many.
Crank polishing: Extends bearing life, reduces oil temp, frees up a slight amount of average horsepower. This is a very low cost upgrade, and in the world of mass production, most cranks do not come with a true polished finish. This is why most machine shops have a machine to do this. The difference is dramatic between a crank right out of the box and one that we have polished. Bearing companies claim that cranks that have better finishes on the journals will survive the break-in better, and have much longer bearing life. We do a three step process and bring the RA numbers down in the single digit range. We have the most advanced crank polishing machine on the market. We find this to be an excellent upgrade for your engine build, considering the low cost. We polish the crank for every engine we build.
Cost for this crank polishing upgrade is $38.50 We have this upgrade featured in our other listings. You can see this and other upgrade options in our ebay store under the "UPGRADES" category, or simply do a search with the key word, "Upgrade" in the search bar when shopping in our ebay store. Before you finalize your purchase of this assembly you may add any of these upgrades to your shopping cart. Click here to add upgrades.
The appearance of the journals show a dramatic difference once polished.
