Upgrade: 1500HP Short Block: $17,250
Upgrade: 2500HP Billet Short Block: $34,250
Upgrade: 1500HP Level One Assembled Long Block: $22,000
Upgrade: 1500HP Level Two Assembled Long Block: $23,750
Upgrade: 1500HP Level Three Assembled Long Block: $25,000
Upgrade: 2500HP Assembled Long Block: $42,000
We offer two different 421ci Hellcat based stroker short blocks. Option one is rated at 1500hp and starts off with a custom prepped modified Demon cast iron engine block. Option two is rated at 2500hp and starts with a custom billet aluminum block with fully functional water jackets so it can be driven just like a normal car. They both feature custom Winberg crankshafts, custom Carrillo connecting rods, custom Gibtech pistons with hard coating treatment, ARP main studs, ARP CA625 Tool Steel head studs, Calico coated Clevite bearings, torque plate block honing, custom machining on oil pressure and return passages, custom piston cooling system, line honing, ultra-precise block decking, piston and rod pin fitting, piston rings custom file fit for exact engine combination, engine balancing and short block assembly. We can offer these as long block configurations which include a custom grind billet camshaft and every single cam is uniquely custom made for the exact engine combination, vehicle specs, intended uses, etc.…we don’t have any “one size fits all” camshaft grinds. We offer our 1500 hp long blocks in three different levels and the only difference aside from each having unique camshaft specifications are cylinder head options. Our Level One long block uses a set of stock Demon cylinder head castings that have been CNC ported (core required) with bronze valve guides, 5 angle valve job with extensive blend and mill work, PSI valve springs, locators and Viton seals. The Level Two long block features a set of CNC ported Thitek billet castings (no core required) with 2.200” stainless steel hollow stem intake valves, 1.650” stainless steel solid stem exhaust valves, bronze valve guides, 5 angle valve job with extensive blend and mill work, PSI 1512 valve springs, ductile valve seats, titanium retainers, bead groove locks, locators and Viton seals. The Level Three long block uses the same cylinder heads as Level Two, but the intake valves are upgraded to titanium and the exhaust valves are upgraded to Inconel. The 2500hp long block using the custom billet block is only available with the cylinder head configuration in Level Three but the heads are machined to accept custom ARP ½” Tool Steel Head studs that we use in the billet block to keep the heads from lifting under extremely high boost levels.