The Garrett GVW-40 40mm Black Wastegate Kit is perfect for car enthusiasts and mechanics looking to boost their engine's performance. Whether you're working on a daily driver or a high - performance race car, this kit is a great fit. It features a 40mm size that ensures precise control of exhaust gases. The black finish not only looks cool but also provides some protection against corrosion. This wastegate kit can be easily installed in most turbo - charged engines, giving you a quick and effective upgrade.