In your Subaru engine there are a set of butterfly valves in your intake track, what these do is open and semi-close to speed up airflow to the engine during low-rpm and low load situations, to help with combustion, but if you are looking for power gains, the stock TGV have restrictions.

GNP's TGV Deletes are an easy and cost-effective way to eliminate restrictions in your 2015+ WRX and 2014-2018 Forester XT intake tract! 


Our Tumble Generator Valve (TGV) Deletes removes the restrictive butterfly valves from the intake tract to allow for a higher volume of airflow for more power and sharper throttle response.


The GNP TGV's are compatible with the factory O-ring sealed manifold, so no gaskets are required.

A retune is required to take full advantage of the TGV deletes.


Available for:

2015 - 2020 wrx

2014 - 2018 forester xt 



GNP's Tumble Valve Generator Delete Kit

C$110.00 Regular Price
C$99.99Sale Price
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    Great North Performance © 2019

    Great North Performance parts will change the performance and handling of your car.

    Please drive accordingly, to addjust to the new driving dynamics.

    GNP's performance parts may not be road leagal in all provinces and states, please check with your local laws prior to installation.

    Installation of performance products may void vehicle warranty coverage, if any, on your vehicle.

    GNP is not responsible for any losses incurred from the use of any and all products sold.

    The owner of the car and user of the products are solely responsible for the legality and safety

    of their own vehicle when you modify using aftermarket components.