The Mishimoto Protection Bundle for the 2022+ Honda Civic Si addresses the most vulnerable points of your turbocharged 1.5T before wear and contamination have a chance to take hold. Designed to work together as a system, these three components form a comprehensive defense for your cooling and PCV systems right out of the box.

The Baffled Oil Catch Can intercepts oil-laden blow-by gases before they can coat your intake valves and degrade combustion quality, making it a critical upgrade for direct-injection engines like the L15 in the Civic Si. Its 50-micron bronze filter and internal air diverter baffle separate and capture oil particles, keeping your intake clean without any permanent modifications. The can mounts at a firewall location for easy access and installs in under thirty minutes.

Paired with the catch can, the Silicone Coolant Hose Kit swaps out the factory rubber hoses for a five-layer silicone construction reinforced with heat-resistant embedded fibers. The full kit (upper hose, lower hose, and reservoir hose) bolts directly in place using the included worm-gear clamps, retaining OEM fitment while significantly improving pressure and heat tolerance.

Completing the bundle, the Performance Aluminum Radiator replaces the stock unit with a fully aluminum core featuring precision TIG-welded end tanks and a 40mm strutted tube design that resists chassis flex. With a 44% increase in core volume and an 85% boost in internal tube area, it moves heat out of the system more efficiently under demanding conditions. The magnetic drain plug adds an additional layer of protection by capturing metallic particles in the coolant before they can cause damage.

All three pieces install without bumper removal or cutting and arrive backed by the Mishimoto Lifetime Warranty.