AMS Performance 4.3L VR38 Stage 5 Billet Short Block

The cornerstone of the highest horsepower VR38 engines on the planet.


Build Times Vary for AMS Engines Assemblies. Contact Sales Dept. for Latest ETA.


SKU ALP.07.04.0305-1 Category Tags , Brand:

California Residents: Prop 65 Warning

Additional information

Weight 190 lbs
Dimensions 32 × 28 × 24 in

CARB And / Or EPA Compliance Testing Not Completed

While we believe this product is either CARB EO exemption applicable, or complies with the EPA's Anti-Tampering Policy, we have not completed the required testing and administrative process at this time. This product is not available to purchase for emissions-controlled vehicles located within the state of California, or available to ship to California addresses, without a completed AMS Race Waiver form. International users outside of the United States should act in accordance with their local laws and regulations.

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With 23 years of documented research and development in the forced induction field, AMS Performance has proven itself as the powerhouse in the automotive aftermarket. Our award winning performance systems are what all others are measured by.

The AMS Performance 4.3L VR38 Stage 5 Billet Short Block is the ultimate solution for high horsepower builds in your Nissan GTR. This fully assembled short block is ready for effortless installation and is crafted with precision machining using our advanced in-house equipment. Each AMS built engine has been strategically strengthened in multiple ways to support the monstrous power and torque produced by our OMEGA and ALPHA performance packages. Assembled in a state-of-the-art temperature and humidity controlled clean room, it ensures every detail is meticulously crafted to perfection. By applying our decades of race-winning experience to the Nissan VR38 we have engineered the strongest, most advanced engine program available for your GTR.

  • The Perfect Solution for High Horsepower Builds
  • Fully Assembled Short Block Ready for Heads, Manifolds, and Accessories
  • Incorporates AMS Billet Block for Exceptional Strength
  • Precision Machining With Advanced Industry Leading Equipment
  • Assembled in State-of-the-Art Temperature and Humidity Controlled Clean Room
  • New OEM Gaskets, Seals, and Hardware Throughout


The Pinnacle of VR38 Engines

We have successfully applied our race-winning experience to the VR38DETT V6 to bring you the pinnacle in engine programs. By developing AMS proprietary engine components we have engineered the strongest, most advanced motor program available for your GTR, along with the track times to back it up. The AMS Performance 4.3L VR38 Stage 5 Billet Short Block is the ultimate solution for high horse power reliability. Our short block engine assemblies come as a complete rotating assembly to make installation as painless as possible, ready to drop right in to your GTR! This proven power plant uses only the best off the shelf and custom designed AMS spec components made to our exacting standards.

Technical Specifications

  • Displacement: 4.3 liters
  • Bore: 98 mm
  • Stroke: 94.4 mm
  • Appx. Compression Ratio: 10:1
  • Recommended Rev Limit: 9000 RPM*
  • Recommended Max Power & Torque: 2200 WHP / 1350 lb-ft*

Build Sheet

  • AMS OMEGA Spec Billet Engine Block
  • AMS Extreme Duty Head Gasket Sealing Solution
  • AMS 98mm Big Bore Ductile Iron Dry Sleeves
  • Hone and size to Omega “Gas Port” Spec
  • Bryant Racing Billet “Stroker” Crankshaft
  • Manley 300M Connecting Rods to AMS Spec
  • Manley Pistons to AMS Spec (Gas Ported)
  • BBC Rod Bearings Conversion
  • Bryant Crankshaft Full Balance Job
  • King Main Bearings
  • BBC Modified Rod Bearings
  • New OEM Seals and Gaskets
  • Multiple Stage Cleaning and Prep Process


The Ultimate Aerospace Grade Billet Engine Block

The AMS Performance R35 GT-R Billet Block is simply the best. Whether it is in the world’s first 6 second GTR, ALPHA G, or the most celebrated street car ever, and back to back “King of the Streets” Champion, the AMS ALPHA Omega GTR, our VR38 Billet Short Block is the centerpiece of winning. The block features alloy steel main caps with splayed bolts for better load distribution and skirted block design for the highest levels of crankshaft support. The cylinders feature custom designed ductile iron sleeves and extra thick walls to withstand extreme cylinder pressures, allowing for an increase to 4.3 liters of displacement. This increase in displacement allows for quicker spool times and better low end torque over the standard 3.8 liter factory engine. If you are building a Nissan GT-R to compete against the world’s best, then the AMS Performance VR38 R35 GT-R Pro Billet Series Block is where to start.


Our Race Winning Experience Creates Higher Standards

All of our built engines are individually handcrafted at AMS using the same care as the ones found in our world record setting race cars. When you choose an AMS engine you are investing in the knowledge gained from assembling thousands of race engines over the past 20+ years. Just like in our 3000+ WHP race cars, every motor is balanced, blueprinted and assembled to our precise specifications. Before assembly each block is checked for correct dimensions, cylinder bore, main alignment, block flatness, and more to ensure you get the best foundation for your new engine. Every engine we assemble has an archived spec sheet where tolerances, torque specs, and clearances are documented as part of our standard quality control process.



  • * Horsepower and torque numbers, and RPM limits are approximate and can vary significantly depending on numerous factors such as your turbocharger selection, intake and exhaust restriction/backpressure, and fuel octane and quality, among many others. The advertised numbers herein are based on optimal conditions and utilizing proper supporting modifications, but are generally attainable results by an average customer. Your results may vary.
  • In rare cases, our component selection may vary from advertised based on supply chain delays. All component substitutions will be communicated in advance by your AMS Sales Representative during the engine assembly process.
  • Stage 5 Billet Short Block requires a usable set of oil squirters sent in as core parts.


  • 2009-2011 (CBA) Nissan R35 GT-R
  • 2012-2016 (DBA) Nissan R35 GT-R
  • 2017-2019 (Facelift DBA / “EBA”) Nissan R35 GT-R
  • 2020-Current (4BA) Nissan R35 GT-R
  • Fits all USDM, JDM, Gulf, and European Models (LHD & RHD)

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