HRM N55 head port plug kit 5inch 2008-2012 E82/E88 BMW 135i N54

2008-2012 E82/E88 BMW 135i N54 including 1M with Relocated Intake Inlets

while newer models such as the Audi S3 (8P) can be lowered between 10-40mm due to being much lower from the factory

Optimum OEp: F: 2551-0918-10   R: 2551-1170-00

Each shock is tuned with a progressive rate spring that is engineered from its inception to work with the shock’s valving

creating a finely tuned suspension system

HRM N55 head port plug kit 5inch 2008-2012 E82/E88 BMW 135i N54Have a higher boost N55? Our head port plug kit prevents boost pressure from entering the valve cover on the n55 where boost leaks can present themselves at the valve cover or internal diaphragm. *an aftermarket pcv system breather cap is recommended *professional installation is recommended. *intended for off road use only.