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All of our Muscle Motors kits feature our private label crankshafts. As stated in the opening statement about stroker kits: we strongly recommend micro polishing of any (except K1 and Compstar) Asian crank. As an option any of our Big Block kits can be upgraded to a K1 crankshaft for an additional charge. The K1 cranks do not require micro polishing to remove taper.
440/446: 3.75 stroke x 6.768 rod
This is really not a stroker kit but a stock stroke replacement rotating assembly. Te r standard kit is offered with a stock crank & rods and cast hyperutectic pistons. Plasma-moly piston rings, Clevite 77 bearings and balancing are all included. Upgrades are available.
Only: $1399
440/500: 4.15 stroke x 6.76 rod
This is the kit that stared it all. Forged dished pistons are required for pump gas compression. It is available in .030, .040 & .055 bores with quite a few different compression ratios available. This kit will require minor bore notching so that the rod bolts do not interfere with the block. You will also need to clearance the boss that the oil pick up tube screws into. Kit comes competition balanced with Plasma moly rings and chamfered bearings. A tried and true combination for the ages.
Only: $1999
440/512: 4.25 stroke x 7.100 rod
This is the kit that comes standard in our Killer Krate engine. The kit will actually make 505” in a +.030 bore. Again forged dished pistons are standard The 4.250 stroke is made with a 2.200 rod journal. This smaller journal does not need bore notching and only minimal work to the oil pick up boss. The long rod makes for a very light weight piston. Plasma moly piston rings, chamfered performance rod and main bearings along with competition balancing of the rotating assembly is included. This is the same kit we used in our 2008 Carlisle engine giveaway featured in Mopar Muscle magazine. We do have many choices for bore and compression available.
Only: $1999
440/525: 4.375 stroke x 7.100 rod, 1.
Were gettttiiinnng biiiggger! This is a great combination for heavier vehicles that still want to maintain an internal oil pick up tube. Station wagons, trucks, B and C bodies with full interior are common recipients of this stroker combination. Lots of stroke (read: torque) to motivate a 3800+lbs Mopar. Chamfered bearings as well a file to fit plasma moly rings are included in the balanced rotating assembly. Forged .030, .040 and .055 available in dished and flat top pistons.
Only: $1999
440/540: 4.500 stroke x 7.100 rod.
For stock blocks this is the largest stroke we will build. It will require bore notching, oil pump boss clearancing AND an external line oil system. If you want the max out of you stock engine block and don’t mind the external line oil system, this is the kit for you. The 4.500 stroke works great for Pro Street cars that have big tires a tall gears. This kit, like all of our kits is balanced and comes with file to fit rings and proper chamfered bearings. Flat top and dished forged pistons in .030, .040 and .055 are available.
Only: $1999
King Krate/ 4.500 & 4.750 stroke x 7.100 rod
These kits are for aftermarket (4.500 and bigger bore) blocks only. The 4.500 x 4.500 make a 572”. The 4.75 stroke x 4.500 bore makes a 604” (622” in 4.560 bore) These kits are what we use to make our King Krate pump gas engines. Ross dished forged pistons are standard equipment along with plasma moly rings and chamfered bearings. As with all of our kits, They are all meticulously balanced on our computerized Hines crankshaft balancer. There are many upgrades for the kits depending on application.
Only: $2199