Review on 🔧 GM Genuine Parts 12639087 Intake Manifold Assembly: High-Quality Replacement for Optimal Engine Performance by Thomas Henry

I replaced the L86 with a 2014 L83. The packaging was great. Installation was easy, L86 ran without any problems. Bought an L86 throttle body and all new gaskets. The only problem was the intake manifold cover and those horrible Christmas tree clips on the back of the intake. After installation, the Check Engine does not light up. I have TSP headers and this mod was essential! Improved throttle response and sound! Gonna get a melody to really bring it to life. If you're considering this exchange, do it, you won't regret it.