AAM Competition VQ37 STGIV 4.3L Longblock Engine Package

AAM Competition Stage 4 VQ37 Long Block package features include:

Darton MID Sleeves
AAMC 4.07L to 4.3L Stroker Kit w/Pro H-Beam rods and 625+ fasteners
AAMC/ARP L19 head studs
AAMC/ARP main studs
AAMC Racing Head Gaskets
New OEM rod bearings
New OEM main bearings
New OEM thrust bearings
New OEM oil pump
New OEM engine gaskets
Long block fully disassembled and cleaned (does not include removal of engine accessories and timing assembly - see photo for reference)
Block inspected and prepared for precision machining
Block decked and squared
Precision bored/honed using a torque plate for proper piston to wall clearance
Crank fully inspected and journals micro-polished
Precision engine rotating assembly blueprint & race balance
Heads inspected & pressure tested
Heads milled as necessary
Precision 3 Angle Valve Job
New OEM valve stem seals installed
Valve height & clearance set for OEM camshafts
Heads final prepped for long block assembly
Precision long block blueprint & assembly (heads bolted and torqued to block - does not include installation of engine accessories and timing assembly - see photo for reference)
Block Strengthening Option & O-Ring (+1890.00)

15,995.95 15995.95 USD 15,995.95


  • Longblock Core
  • Block Strengthening

This combination does not exist.

 In Stock - ready to ship!

AAM Competition 370Z & G37 STGIV 4.07L to 4.3L Stroker Kit Engine Package

The AAM Competition Stage 4 VQ37 Longblock is the ultimate engine setup for those seeking maximum power output.  This 4.07L to 4.3L stroked and sleeved motor is ready for 1,000+ whp (with optional proprietary block strengthening).

The added displacement of the stroker kit greatly increases low-end and midrange power.  On boosted application expect the turbochargers to spool up 300 to 600rpm sooner than a comparably setup non-stroker engine.

The AAM Competition Stage 4 VQ37 Longblock comes with a full one year warranty against machining defects.

Exclusive Benefits

  • The strongest, best optioned engine package available for the VQ37VHR
  • Capable of supporting 1,000+ whp

  • Larger displacement spools turbochargers faster

  • Larger displacement increases torque


  • Forged Steel Billet Crankshaft
  • Forged Racing Pistons

  • Pro Series Rods

  • Upgraded fasteners and L19 Head Studs


Longblock Core Sending Longblock Core First or Paying Longblock Core Charge
Block Strengthening No Block Strengthening or Block Strengthening Upgrade

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