2.1 Shortblock Packages

Need more POWER? JAM's 2.1 EVO 4-9 performance shortblock packages are unsurpassed in quality and longevity. Suitable for both your hot street or track use, our shortblocks will provide the ultimate in performance. Our 2.1 custom design allows for Higher rev's, Faster spool-up, More horsepower and Increased Torque. Every engine is precision machined "In-House" using our state of the art tooling and techniques. Our engines are built using only dyno tested and race track proven techniques and components.

The following services and quality components are used in this Stage 2.1 build:

• The block is completely disassembled and cleaned
• Visually inspected
• All threads are checked
• Main bolt holes are tapped
• Align bore specs are checked and recorded w/ARP main studs
• Cylinders are sonic tested for thickness
• The block is then squared decked
• The deck holes are bottom tapped for ARP head studs
• The block is precision bored
• The bores are 4-step torque plated honed using our proprietary methods for ultimate ring seal
• We then machine your block for the proper clearances and to our spec
• File fit piston rings per cylinder
• The block is then thoroughly washed for final assembly
• The new crank is fully inspected and micro-polished
• The new rods & pistons are pin fit to our specs
• The rotating assembly is precision balanced
• The cleaned block oilers are then installed
• We install your JAM Spec-performance ACL Shaft brgs
• Install the new freeze plugs, galley plug and head to block dowels
• The rotating assembly is then installed into the machined block.

JAM Stage 1 package +850whp

Our Stage 1 shortblock comes fully assembled with the following components:

• Our custom Venolia pistons, 85.5mm bore, 8.5:1cr
• Eagle forged steel crankshaft
• Hard Tuff coated pistons
• HD Tool Steel pins
• Spiro Locks
• Oliver Billet rods w/ARP series 2000 bolts
• JAM-Ultra file fit ring pkg
• ARP Main stud kit
• JAM Spec-performance coated ACL balance shaft brgs
• JAM Spec-performance coated ACL engine bearings
• Precision balanced as a rotating assembly

JAM Stage 2 package +950whp

Our Stage 2 shortblock comes to you fully assembled with the following components:

• K1 Billet crankshaft, lightened
• Our custom Venolia pistons, 85.5mm, 8.5:1cr
• Hard Tuff coated
• HD Tool steel pins
• Spiro locks
• Oliver billet rods with ARP 2000 bolts
• JAM -Ultra file-fit ring package
• JAM performance coated ACL Race rod and main engine bearings
• JAM performance coated ACL balance shaft brgs
• ARP main studs
• Precision balanced as a rotating assembly

• ARP 11mm Head Stud Kit
• JAM Spec-Oil Pump/Front Cover Kit
• OEM MLS Head Gkt
• Fluidampr SFI approved
• O-Ring