Perrin Performance PSP-SUS-525 Sub frame Lockdown System(02-07 Wrx/Sti Rear Differential /), 1 Pack

### Editorial Review The Perrin Performance PSP-SUS-525 Subframe Lockdown System has garnered a mix of positive and cautionary feedback from customers, primarily pertaining to its performance and ease of installation. Users appreciate the straightforward installation process, noting that there is no need for press work on diff bushings, as the product simply fills existing voids. This simplicity makes it an attractive option for those looking to enhance their rear-drivetrain and rear-suspension connection effectively. Several reviews highlight the notable performance improvements that users experienced, particularly during acceleration when under boost; the enhanced rear-end rigidity provides drivers with better control. However, potential buyers should be aware that the outrigger bushings may introduce significant noise at highway speeds, which could be particularly jarring for those with vehicles like the WRX Wagon. This sound issue prompts some users to contemplate removing the bushings altogether, especially if quieter operation is a priority. Compatibility appears to be a concern for certain models, with users reporting that while some components fit well, others do not, leading to improvised solutions. The quality of the materials is generally praised, with many customers preferring the machined metal Construction of Perrin products over competing offerings. Despite some minor installation challenges and compatibility issues, the overall sentiment is that the lockdown bolts and bushings significantly contribute to driving enjoyment. Moreover, a few users encountered difficulties with the lockdown bolt installation, including issues with the bolt snapping during the process, prompting the need for additional tools or techniques to successfully fit them. Ensuring that the necessary tools, like a tap, are available beforehand is recommended to avoid these complications. In summary, while the Perrin Performance Subframe Lockdown System offers solid performance upgrades, potential buyers should proceed with a good understanding of their specific vehicle's compatibility and be cautious during installation. ### Pros and Cons **