Alpha Performance R35 GT-R Big Bore Billet Throttle Bodies

Maximum Airflow For Your Hungry VR38 Engine

At about 800HP your stock throttle bodies start to become a restriction in the intake system. The throttle bodies continue to exponentially become more of a bottleneck as the power increases from there. By boosting the size of the throttle bodies from the stock 60mm to a massive 73.5mm we increased the cross sectional area by 50%. This equates to massive gains in power especially over the 1000HP mark.

The Largest VR38 Throttle Bodies On The Market

Since we are a true performance automotive manufacturing company, we employ a team of highly qualified engineers – not some idea based on a whim. Our engineering Team was given the mission to make the largest, best performing throttle bodies on the market to feed our Alpha Carbon Fiber Intake Manifold and they delivered! Each CNC billet 6061-T6 aluminum housing was specifically designed to provide enough air flow to support up to 2000+HP without issue – implementing enlarged diameter 73.5mm ID bores along with low profile throttle body shafts to minimize restrictions even further.   

Throttle Body Upgrade Made Easy

Each Alpha Big Bore Throttle Body uses your existing Nissan OEM drive-by-wire electronics. Simply swap out the internal components from your stock throttle bodies and you are ready to go. We even supply a comprehensive instruction video to show you how it’s done.

Uncork your GT-R’s potential, order your Alpha GT-R Big Bore Throttle Bodies Today!

Exclusive Benefits

73.5mm throttle bodies – the largest on the market
22.5% increase in size
Increased mid-range and top end power
Does not adversely affect low-end power


Big bore billet throttle body housings
Big bore throttle body gaskets
Wiring harness


2009+ Nissan R35 GT-R
Fits all USDM, JDM and European Models (LHD & RHD)

Compatibility Notes

For proper driveablity these Alpha Big Bore Throttle Bodies are suggested for use with standalone engine management systems only.

Will not work with factory fuel rails. Confirmed to fit with Alpha Fuel Rails and should fit with other aftermarket rails

Questions? Please contact us at [email protected]

AMS/ALPHA Performance
1760 Metoyer Court
West Chicago, IL 60185

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