1957-1986 SBC Small Block Chevy Aluminum Performer Dual Plane RPM Intake manifold 350 400

**** The 1957-1986 SBC Small Block Chevy Aluminum Performer Dual Plane RPM Intake manifold has garnered mixed reviews from customers, primarily focusing on its installation challenges and overall quality. While many users acknowledge the cost-effectiveness of the product, a significant number express dissatisfaction due to the fitting issues and casting quality. Installation appears to be a common hurdle, with users noting that the intake manifold is generally wider than expected. This necessitates trimming or grinding of both the manifold and surrounding components, especially the valve covers. Some customers highlight that if they had known the fitment would require such modifications—a sentiment echoed through multiple reviews—they might have opted for a more expensive, reputable brand instead. Quality control also emerged as a critical concern, with several buyers reporting uneven bolt surfaces and overall warping that hinder optimal installation. While some users managed to make the intake work with a bit of extra effort, there’s a palpable frustration among those who found the casting flawed. This has led to a sentiment that the manifold is a "cheap" alternative, often not living up to the performance and reliability expectations expected of such a product. Overall, the product may serve well for those unperturbed by the extensive modifications and willing to accept its low-cost nature, but others may prefer investing in a name-brand solution for peace of mind and seamless installation. **