6.1 HEMI Based Custom Long Block
You can now order a 6.1L HEMI long block that is customized to your specifications. ShopHEMI's long block includes the bottom end rotating assembly parts found in our custom HEMI short block motors, but adds top end components such as performance heads and cams. By selecting a 6.1L long block from ShopHEMI you will be saving yourself the time of putting together your top end, as well as, having the peace of mind that your engine was assembled by top HEMI engine builders. What's more, you do not have to settle for a cookie cutter top end- each custom long block we manufacture is built to our customers specifications and designed around their driving needs.
Our 6.1 HEMI Long Block Kit is a part of our Arrington Signature Series which means our engineers have exhaustively studied and tested the designs and methods incorporated in this HEMI stroker long block based build. This Custom HEMI engine starts with a 6.1L HEMI long block and packs in many of the same modifications and upgrades that our winning NASCAR Engines include. From its MOPAR HEMI base, this customizable 6.1 Based HEMI can be modified to come alive. Long block head options include a choice of Manley Titanium retainers, a big valve upgrade, or both. Camshaft options include naturally aspirated, forced induction, and profiles for variable valve timing.
Your 6.1 based HEMI stroker engine is waiting. Start customizing your kit below.

- K1 or Manley – Arrington Spec Forged Steel Crankshaft.
- Total Seal NASCAR Grade Steel Piston Rings
- K-1 Forged H Beam Bushed Connecting Rods w/ARP 2000 Rod Bolts
- Wrist Pin & Locks
- ARP Main Studs
- Cleveite H Type Main and Rod Bearings
- Mopar Performance Block Plugs
- Gun Shot Paint - Choice of Colors
- Receiving Inspection
- Dissemble Core (If Required)
- Hot tank block & remove all liquid contaminants
- As Received Measurements
- Sonic Check Cylinder Bores
- Clean Oil Galleys
- Bore Scope Cavities (If Required)
- Hand Chase Threads (If Required)
- Validate Deck Surface
- Validate Bore Centerlines
- Bore Cylinders
- Hone Cylinders w/Honing Plate
- Install Billet Main Caps (optional)
- Line Hone (If required)
- Hand Clearance for Stroker Kit
- Balance Rotating Assembly (we do not depend on factory balance)
- Remove all flashing
- chafer all 90 degree corners
- Radius bottom of all cylinder bores
- Other proprietary block operations.
- NASCAR Grade Block Finish.
- Engineered High RPM Oil System:
- Maintain .0625" chamfer radius throughout oil system.
- Other proprietary oil system operations.
- NASCAR Grade Rotating Assembly Setup:
- Micro-polish all bearing surfaces (including wrist pins).
- Micrometer measurement of all bearing surfaces
- Hand match individual bearings to journals maintaining .0001" tolerance to specified clearances.
- Other proprietary rotating assembly operations.
- CNC Ported
- Single Point Cut CNC Valve Job on a Newen Epoc CNC
- PSI 1511 Springs
- Hardened Steel Retainers
- Hardened Steel Locators
- Viton Valve Seals
- Capable of up to .625” Lift
- High Velocity Air Flow











