Alpha 4.4L Big-Bore Crate GT-R Engine

We have successfully applied our race-winning experience to the GT-R’s VR38 to bring you the pinnacle in engine programs. By developing AMS proprietary engine components we have engineered the strongest, most advanced VR38 engines available for your GT-R and we have the World Records to back it up.

The Pinnacle VR38 Engine For Upgraded Turbos

By adding a billet stroker crank to our already potent 4.0L Big-Bore Engine we have raised the bar once again. When changing to larger turbos there is always a tradeoff of low end grunt for increased top-end power. To remedy this our 4.4 liter Big-Bore Stroker Engine increases displacement by 14% which adds horsepower and most importantly asphalt shredding torque. The increased bore and stroke coupled with an elevated compression ratio produces more low end torque which considerably reduces turbo lag and improves boost response. The Alpha 4.4L picks up an additional 15-20% more torque achieving a 700-1000 rpm improvement in turbo spool up time when compared to its 3.8L counterpart! You can now have your cake and eat it too!

Alpha Engineering Provides The Only Fortified Engine Block Available

Each Alpha Big-Bore Race Engine has been strategically strengthened to support the monstrous power and torque capable with our Alpha Packages. As the GT-R aftermarket companies started pushing the VR38 harder we began to see some engine blocks cracking at 800+ torque levels. Our Engineering Team quickly dissected and diagnosed the problem. To overcome the situation they developed a unique, proprietary method to reinforce the block. You won’t find this in the competitors engines as it was developed here at Alpha Performance and is exclusively available in the Alpha Premium Engine Package.

Our Race Winning Experience Creates Higher Standards

To further improve the VR38 platform, each block deck is machined to receive a copper o-ring to establish a better combustion seal. Every Alpha 4.4 Race Engine is then precisely balanced, blueprinted and hand assembled to AMS’ exacting standards. Before assembly each block is checked for correct dimensions, cylinder bore, mains, block flatness, etc… to guarantee you get the best foundation for your new engine.

Complete Crate Engine For Ease Of Installation

The Alpha 4.4 Big-Bore Stroker Crate Engine comes complete and sealed from valve covers to oil pan. The engine is timed and the front covers installed so all of the hard work is already done for you making your engine swap a bolt-in affair.

THE ULTIMATE IN PERFORMANCE

The goal of AMS is to provide the highest quality, best performing products available.
By utilizing research and development and rigorous testing programs AMS will never compromise the quality or performance of our products.

SHOP PARTS

NOT LEGAL FOR USE ON POLLUTION CONTROLLED MOTOR VEHICLES. THIS PRODUCT IS FOR RACING COMPETITION ONLY AND IS NOT LEGAL FOR USE ON HIGHWAY OR STREET VEHICLES, OR OTHER NON-RACING COMPETITION OFF-ROAD VEHICLES.

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This policy only applies to installers and/or users who are in the United States, customers who reside in other countries should act in accordance with their local laws and regulations.

Some AMS Performance upgrades may solely be used on vehicles in sanctioned competition which may never be used upon a public road or highway, unless permitted by specific regulatory exemptions (such as a CARB E.O.). For state specific details please visit the following website: http://www.semasan.com/emissions

It is the responsibility of the installer and/or user of the product to ensure that it is used in compliance with all applicable laws and regulations. If a product was purchased in error, do not install and/or use it. The purchaser must arrange to return the product(s) for a full refund.

All performance modifications and installations are at the customer’s own risk. AMS Performance holds no responsibility either implied or otherwise for mechanical, electrical or other failure when using any aftermarket performance products.

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