This manifold throttle is a game-changer for my automotive performance .As a result of using this product I found that my engine responds better and runs smoother than ever before. The fabrication is top-notch and THE compatibility with my Cadillac is spot on. The only downside is that it was a bit tricky to install, but that's to be expected with any high-performance part. Overall, i would highly recommend this product to any performance car enthusiast looking to upgrade their engine`s performance..